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Industrial controls
Safety technology
3TK28 safety relays
Manual
07/2016
NEB926157502000/RS
-AB/003
Introduction
1
Product-specific safety
information
2
Description of the individual
safety relays
3
Mounting
4
Connection
5
Dimension drawings
6
Accessories
7
Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
3ZX1012-0TK28-1AC1
Ⓟ
07/2016 Subject to change
Copyright © Siemens AG 2012.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 3
Table of contents
1 Introduction................................................................................................................................... 7
1.1 Purpose of this manual ........................................................................................................ 7
1.2 Required basic knowledge ................................................................................................... 7
1.3 Validity range ...................................................................................................................... 7
1.4 Definitions ........................................................................................................................... 8
1.5 User responsibility for system design and function ............................................................... 8
2 Product-specific safety information .................................................................................................. 9
2.1 Intended use ....................................................................................................................... 9
2.2 Current information about operational safety ...................................................................... 10
2.3 Declaration of conformity ................................................................................................... 10
2.4 General safety notes ......................................................................................................... 11
2.5 Safety information for hazardous areas.............................................................................. 12
3 Description of the individual safety relays ....................................................................................... 13
3.1 Introduction ....................................................................................................................... 13
3.2 Overview ........................................................................................................................... 14
3.3 General technical data ....................................................................................................... 18
3.4 Cable lengths .................................................................................................................... 19
3.5 General information about enabling and signaling circuits .................................................. 20
3.6 3TK28 safety relays with relay enabling circuits ................................................................. 21
3.6.1 3TK2810-0 safety relay ..................................................................................................... 21
3.6.1.1 Applications ....................................................................................................................... 21
3.6.1.2 Description of function and connection information ............................................................ 21
3.6.1.3 Structure of the 3TK2810-0 ............................................................................................... 23
3.6.1.4 Terminal assignment ......................................................................................................... 23
3.6.1.5 Display of the operating state ............................................................................................ 24
3.6.1.6 State diagram 3TK2810-0 .................................................................................................. 25
3.6.1.7 Technical data 3TK2810-0 ................................................................................................. 26
3.6.1.8 Connection examples 3TK2810-0 ...................................................................................... 31
3.6.2 3TK2820 safety relay......................................................................................................... 33
3.6.2.1 Applications ....................................................................................................................... 33
3.6.2.2 Description of function and connection information ............................................................ 33
3.6.2.3 Structure 3TK2820 ............................................................................................................ 34
3.6.2.4 Terminal assignment ......................................................................................................... 34
3.6.2.5 Display of the operating state ............................................................................................ 35
3.6.2.6 Installation 3TK2820 .......................................................................................................... 36
3.6.2.7 Connection 3TK2820 ......................................................................................................... 38
3.6.2.8 Technical data 3TK2820 .............................................................................. 42
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3TK28 safety relays
4 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.2.9 Connection examples 3TK2820 ..........................................................................................45
3.6.3 3TK2822 / 3TK2823 safety relays .......................................................................................47
3.6.3.1 Applications........................................................................................................................47
3.6.3.2 Description of function ........................................................................................................47
3.6.3.3 Connection advice ..............................................................................................................47
3.6.3.4 Structure 3TK2822/23 ........................................................................................................48
3.6.3.5 Terminal assignment ..........................................................................................................48
3.6.3.6 Display of the operating state .............................................................................................49
3.6.3.7 State diagrams 3TK2822 / 3TK2823 ...................................................................................50
3.6.3.8 Technical data 3TK2822 / 3TK2823 ....................................................................................51
3.6.3.9 Connection examples 3TK2822 / 3TK2823 .........................................................................54
3.6.4 3TK2821 / 3TK2824 safety relays .......................................................................................55
3.6.4.1 Applications........................................................................................................................55
3.6.4.2 Description of function and connection information .............................................................55
3.6.4.3 Structure 3TK2821/24 ........................................................................................................56
3.6.4.4 Terminal assignment ..........................................................................................................56
3.6.4.5 Display of the operating state .............................................................................................57
3.6.4.6 State diagrams 3TK2821 / 3TK2824 ...................................................................................57
3.6.4.7 Technical data 3TK2821 / 3TK2824 ....................................................................................58
3.6.4.8 Connection examples 3TK2821 / 3TK2824 .........................................................................61
3.6.5 3TK2824-.A.20 safety relay ................................................................................................64
3.6.5.1 Applications........................................................................................................................64
3.6.5.2 Description of function and connection information .............................................................64
3.6.5.3 Structure 3TK2824-.A.20 ....................................................................................................65
3.6.5.4 Terminal assignment ..........................................................................................................65
3.6.5.5 Display of the operating state .............................................................................................66
3.6.5.6 State diagrams 3TK2824-.A.20 ...........................................................................................66
3.6.5.7 Technical data 3TK2824-.A.20 ...........................................................................................67
3.6.5.8 Connection examples 3TK2824-.A.20 .................................................................................70
3.6.6 3TK2825 safety relay .........................................................................................................72
3.6.6.1 Applications........................................................................................................................72
3.6.6.2 Description of function and connection information .............................................................72
3.6.6.3 Commissioning...................................................................................................................72
3.6.6.4 Structure 3TK2825 .............................................................................................................73
3.6.6.5 Terminal assignment ..........................................................................................................73
3.6.6.6 Display of the operating state .............................................................................................74
3.6.6.7 State diagrams 3TK2825 ....................................................................................................75
3.6.6.8 Technical data 3TK2825 .....................................................................................................76
3.6.6.9 Connection examples 3TK2825 ..........................................................................................79
3.6.7 3TK2827 / 3TK2828 safety relays .......................................................................................82
3.6.7.1 Applications........................................................................................................................82
3.6.7.2 Description of function and connection information .............................................................82
3.6.7.3 Structure 3TK2827/28 ........................................................................................................84
3.6.7.4 Terminal assignment ..........................................................................................................84
3.6.7.5 Display of the operating state .............................................................................................85
3.6.7.6 State diagrams 3TK2827 / 3TK2828 ...................................................................................86
3.6.7.7 Technical data 3TK2827 / 3TK2828 ....................................................................................87
3.6.7.8 Connection examples 3TK2827 / 3TK2828 .........................................................................93
3.6.8 3TK2830 expansion unit .....................................................................................................96
3.6.8.1 Applications........................................................................................................................96
3.6.8.2 Description of function and connection information .............................................................96
3.6.8.3 Structure 3TK2830 .............................................................................................................97
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3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 5
3.6.8.4 Terminal assignment ......................................................................................................... 97
3.6.8.5 Display of the operating state ............................................................................................ 98
3.6.8.6 State diagrams 3TK2830 ................................................................................................... 98
3.6.8.7 Technical data 3TK2830 .................................................................................................... 99
3.6.8.8 Connection examples 3TK2830 ....................................................................................... 102
3.6.9 3TK2834 two-hand control device .................................................................................... 103
3.6.9.1 Applications ..................................................................................................................... 103
3.6.9.2 Description of function and connection information .......................................................... 103
3.6.9.3 Structure 3TK2834 .......................................................................................................... 104
3.6.9.4 Terminal assignment ....................................................................................................... 104
3.6.9.5 Display of the operating state .......................................................................................... 105
3.6.9.6 Technical data 3TK2834 .................................................................................................. 106
3.6.9.7 Connection example ........................................................................................................ 109
3.7 3TK28 safety relays with solid-state enabling circuits ....................................................... 110
3.7.1 3TK2840 safety relay....................................................................................................... 110
3.7.1.1 Applications ..................................................................................................................... 110
3.7.1.2 Description of function and connection information .......................................................... 110
3.7.1.3 Structure 3TK2840 .......................................................................................................... 111
3.7.1.4 Terminal assignment ....................................................................................................... 111
3.7.1.5 Display of the operating state .......................................................................................... 112
3.7.1.6 State diagrams 3TK2840 ................................................................................................. 113
3.7.1.7 Technical data 3TK2840 .................................................................................................. 114
3.7.1.8 Connection examples 3TK2840 ....................................................................................... 116
3.7.2 3TK2841 safety relay....................................................................................................... 118
3.7.2.1 Applications ..................................................................................................................... 118
3.7.2.2 Description of function and connection information .......................................................... 118
3.7.2.3 Structure 3TK2841 .......................................................................................................... 119
3.7.2.4 Terminal assignment ....................................................................................................... 119
3.7.2.5 Display of the operating state .......................................................................................... 120
3.7.2.6 State diagrams 3TK2841 ................................................................................................. 121
3.7.2.7 Technical data 3TK2841 .................................................................................................. 122
3.7.2.8 Connection examples 3TK2841 ....................................................................................... 124
3.7.3 3TK2842 safety relay....................................................................................................... 127
3.7.3.1 Applications ..................................................................................................................... 127
3.7.3.2 Description of function and connection information .......................................................... 127
3.7.3.3 Structure 3TK2842 .......................................................................................................... 128
3.7.3.4 Terminal assignment ....................................................................................................... 128
3.7.3.5 Display of the operating state .......................................................................................... 129
3.7.3.6 State diagrams 3TK2842 ................................................................................................. 130
3.7.3.7 Technical data 3TK2842 .................................................................................................. 131
3.7.3.8 Connection examples 3TK2842 ....................................................................................... 133
3.8 3TK28 safety relays with contactor relay enabling circuits ................................................ 136
3.8.1 3TK2805 / 3TK2806 safety relays .................................................................................... 136
3.8.1.1 Applications ..................................................................................................................... 136
3.8.1.2 Description of function and connection information .......................................................... 136
3.8.1.3 Structure 3TK2805/06 ..................................................................................................... 137
3.8.1.4 Terminal assignment ....................................................................................................... 137
3.8.1.5 Display of the operating states ......................................................................................... 138
3.8.1.6 State diagrams 3TK2805 / 3TK2806 ................................................................................ 138
3.8.1.7 Technical specifications 3TK2805/ 3TK2806 .................................................................... 139
3.8.1.8 Connection examples 3TK2805/ 3TK2806 ....................................................................... 140
Table of contents
3TK28 safety relays
6 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.2 3TK2850 / 3TK2851 / 3TK2852 safety relay......................................................................142
3.8.2.1 Applications......................................................................................................................142
3.8.2.2 Description of function and connection information ...........................................................142
3.8.2.3 Structure 3TK285 .............................................................................................................143
3.8.2.4 Terminal assignment ........................................................................................................144
3.8.2.5 Display of the operating state ...........................................................................................145
3.8.2.6 State diagrams 3TK2850 / 3TK2851 / 3TK2852 ................................................................146
3.8.2.7 Technical data 3TK2850 / 3TK2851 / 3TK2852 .................................................................147
3.8.2.8 Connection examples 3TK2850 / 3TK2851 / 3TK2852 ......................................................156
3.8.3 3TK2853 safety relay .......................................................................................................158
3.8.3.1 Applications......................................................................................................................158
3.8.3.2 Description of function and connection information ...........................................................158
3.8.3.3 Structure 3TK2853 ...........................................................................................................159
3.8.3.4 Terminal assignment ........................................................................................................160
3.8.3.5 Display of the operating state ...........................................................................................161
3.8.3.6 State diagrams 3TK2853 ..................................................................................................162
3.8.3.7 Technical data 3TK2853 ...................................................................................................163
3.8.3.8 Connection examples 3TK2853 ........................................................................................166
3.8.4 3TK2856 / 3TK2857 safety relays .....................................................................................171
3.8.4.1 Applications......................................................................................................................171
3.8.4.2 Description of function and connection information ...........................................................171
3.8.4.3 Structure 3TK2856/57 ......................................................................................................172
3.8.4.4 Terminal assignment ........................................................................................................173
3.8.4.5 Display of the operating state ...........................................................................................174
3.8.4.6 State diagrams 3TK2856 / 3TK2857 .................................................................................175
3.8.4.7 Technical data 3TK2856 / 3TK2857 ..................................................................................176
3.8.4.8 Connection examples 3TK2856 / 3TK2857 .......................................................................179
4 Mounting ................................................................................................................................... 183
4.1 Warning notices ...............................................................................................................183
4.2 Mounting the device on a DIN rail .....................................................................................184
4.3 Mounting the device on a level surface .............................................................................185
4.4 Disassembling the device .................................................................................................186
5 Connection ................................................................................................................................ 189
5.1 Connection data for terminal blocks ..................................................................................189
5.2 Connecting terminal blocks ...............................................................................................190
5.3 Disconnecting ..................................................................................................................192
5.4 Plugging in terminal blocks ...............................................................................................194
6 Dimension drawings ................................................................................................................... 195
6.1 Dimension drawings 3TK28 ..............................................................................................195
7 Accessories............................................................................................................................... 205
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 7
Introduction
1
1.1
Purpose of this manual
Note
Original manual
The manual for the 3TK28 safety relays described below is the
original manual.
This manual contains a detailed description of the 3TK28 safety relays. This manual
provides you with the information you require to configure, commission, and use 3TK28
safety relays. Typical application examples provide you with a clear and practice-oriented
introduction.
Furthermore, the manual contains dimension drawings, circuit diagrams, and technical data
of the 3TK28 safety relays to facilitate configuration.
1.2
Required basic knowledge
A general knowledge of the following areas is needed in order to understand this manual:
● Low-voltage switchgear
● Digital circuit logic
● Automation systems
● Safety systems
1.3
Validity range
The manual is valid for the available 3TK28 safety relays. It describes the components that
are valid at the time of publication.
SIEMENS reserves the right of including a Product Information for each new component,
and for each component of a later version.
Introduction
1.4 Definitions
3TK28 safety relays
8 Manual, 07/2016, NEB926157502000/RS-AB/003
1.4
Definitions
"3TK28" always applies to all variants of the 3TK28 safety relays.
1.5
User responsibility for system design and function
The products described here were developed to perform safety-related functions as part of
an overall installation or machine.
A complete, safety-related system is generally equipped with sensors, evaluation units, and
signaling units, and uses reliable shutdown concepts.
It is the responsibility of the manufacturer of a system or machine to ensure that the product
functions properly.
Siemens AG, its regional offices, and associated companies (hereinafter referred to as
"Siemens") cannot guarantee all the properties of an entire plant, system or machine that
has not been designed by Siemens.
Nor can Siemens assume liability for recommendations that appear or are implied in the
following description. No new guarantee, warranty, or liability claims beyond the scope of the
Siemens general terms of supply are to be derived or inferred from the following description.
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 9
Product-specific safety information
2
2.1
Intended use
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Proper use of hardware products
This equipment is only allowed to be used for the applications described in the catalog and
in the technical description, and only in conjunction with non-Siemens equipment and
components recommended by Siemens.
Correct transport, storage, installation and assembly, as well as careful operation and
maintenance, are required to ensure that the product operates safely and without faults.
Before you run any sample programs or programs you have written yourself, make sure
that running the plant cannot cause injury to anyone else or damage to the machine itself.
EU note: Commissioning is absolutely prohibited until it has been ensured that the machine
in which the component described here is to be installed complies with the stipulations of
the Directive 2006/42/EC.
Product-specific safety information
2.2 Current information about operational safety
3TK28 safety relays
10 Manual, 07/2016, NEB926157502000/RS-AB/003
2.2
Current information about operational safety
Important note for maintaining operational safety of your system
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Please take note of our latest information
Systems with safety-related characteristics are subject to special operational safety
requirements on the part of the operator. The supplier is also obliged to comply with special
product monitoring measures. For this reason, we publish a special newsletter containing
information on product developments and features that are (or could be) relevant to
operation of safety-related systems. By subscribing to the appropriate newsletter, you will
ensure that you are always up-to-date and able to make changes to your system, when
necessary:
SIEMENS newsletter (http://www.siemens.com/industrial-controls/newsletter)
Sign on to the following newsletter under "Products & Solutions":
• Control Components and System Engineering News
• Safety Integrated Newsletter
2.3
Declaration of conformity
The manufacturer declares that the safety components of the SIRIUS 3TK series in the
designs marketed by us comply with the applicable basic safety and health requirements of
the EC Directives* stated (including amendments) and that the stated standards* were
applied in their design and construction.
* You can download the complete EC Declaration of Conformity as a PDF.
Product-specific safety information
2.4 General safety notes
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 11
2.4
General safety notes
Note
Safety category 4 per DIN EN 954-1 / SIL 3 per IEC 61508 / PL e per DIN EN ISO 13849-1
The 3TK28 safety relays have been designed such that applications up to category 4 per
DIN EN
954-1 / SIL 3 per IEC 61508 / PL e per DIN EN ISO 13849-1 can be implemented.
CAUTION
Protection against electrostatic charge
When handling and installing the 3TK safety relays, ensure that the components are
protected from being electrostatically charged. Changes to the system configuration and
wiring are only permissible while the supply voltage is switched off.
Connection of 3TK safety relays is only permissible when the power supply units (PELV
and SELV) are switched off.
WARNING
Hazardous voltage
Will Cause Death, Serious Injury or Property Damage
Installing devices in control cabinets
Taking the ambient conditions into account, you must install the devices in control cabinets
with the IP32, IP43 or IP54 degree of protection.
CAUTION
Noise immunity/grounding
The following must be grounded in accordance with the regulations to ensure noise
immunity of the 3TK28 safety relays:
• PELV / SELV power supplies (please also observe the documentation of the respective
power supply).
Note
Operational faults and malfunctions in communication
If the EMC Directive 2004/108/EC
is not complied with when plants and devices are
installed, communication breaks may occur.
Note
The 3TK28 devices are products for environment A. These devices can
cause unwanted
radio interference in residential environments. The user may be required to implement
appropriate measures in this case.
Product-specific safety information
2.5 Safety information for hazardous areas
3TK28 safety relays
12 Manual, 07/2016, NEB926157502000/RS-AB/003
2.5
Safety information for hazardous areas
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Installation of the 3TK28 safety relays in hazardous areas
The components of the 3TK28 are
not
suitable for installation in hazardous areas.
Please contact your ATEX specialist.
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 13
Description of the individual safety relays
3
3.1
Introduction
SIRIUS 3TK28 safety relays are mainly used in autonomous safety applications that are not
connected to a safety-related bus system. Here they are used to evaluate sensors and
ensure safety-related shutdown in case of a hazard. They also check and monitor the
sensors, actuators, and the safety-related functions of the safety relay.
Applications
Depending on the version of the device and the external wiring with sensors and actuators,
applications up to Category 4 in accordance with DIN EN 954-1 or SILCL 3 in accordance
with IEC 62061 / PLe as specified in DIN EN ISO 13849-1 can be implemented.
In these applications, 3TK28 safety relays perform the following functions:
● Monitoring the safety functions of the sensors
● Monitoring of the sensor lines
● Monitoring of correct functioning of the safety relay
● Monitoring of actuators for standstill
● Safety-related shutdown in case of hazards
Description of the individual safety relays
3.2 Overview
3TK28 safety relays
14 Manual, 07/2016, NEB926157502000/RS-AB/003
3.2
Overview
Overview of 3TK28 safety relays
The following tables provide an overview of the 3TK28 safety relays.
3TK28 safety relays with relay enabling circuits
3TK28..
20
21
22
23
24
25
27
28
30
34
SENSORS
Electromechanical X X X X X X X X - X
Solid-state
-
-
-
-
-
-
-
-
-
-
Magnetically-operated switches X - - - - - - - - -
START TYPE
Auto
X
X
X
-
X
X
-
X
-
-
Monitored
X
X
-
X
X
X
X
-
-
-
ENABLING CIRCUITS
Instantaneous 3 NO 3 NO 2 NO 2 NO 2 NO 3 NO 2 NO 2 NO 4 NO 2 NO +
2 NC
Delayed
-
-
-
-
-
-
2 NO
2 NO
-
-
SIGNALING CIRCUITS
Relay
1 NC
1 NC
-
-
-
2 NC
1 NC
1 NC
-
2 NC
Solid-state
-
-
-
-
-
-
-
-
-
-
Max. achievable SIL acc. to
IEC 61508 / IEC 62061
3 2 3 3 2 3 3 / 2
(tv)
3 / 2
(tv)
as BU 3
Max. achievable PL acc. to
EN ISO 13849-1
e d e e d e e / d
(tv)
e / d
(tv)
as BU e
Description of the individual safety relays
3.2 Overview
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 15
3TK28 safety relays with solid-state enabling circuits
3TK28..
40
41
42
SENSORS
Electromechanical X X X
Solid-state
-
X
X
Magnetically-operated switches X X X
START TYPE
Auto
X
X
X
Monitored
X
X
X
ENABLING CIRCUITS
Instantaneous
2
2
1
Delayed
-
-
1
SIGNALING CIRCUITS
Relay
-
-
-
Solid-state
-
-
-
Max. achievable SIL acc. to
IEC 61508 / IEC 62061
2 3 3
Max. achievable PL acc. to
EN ISO 13849-1
d e e
3TK28 safety relays with contactor relay enabling circuits
3TK28..
05
06
50
51
52
53
56
57
SENSORS
Electromechanical
X
X
X
X
X
X
-
-
Solid-state
-
-
-
-
-
X
-
-
Magnetically-operated switches
-
-
X
X
X
X
-
-
START TYPE
Auto
-
X
X
X
X
X
-
-
Monitored - - X X X X - -
ENABLING CIRCUITS
Instantaneous
5 NO
5 NO
3 NO
2 NO
6 NO
3 NO+1 SS
6 NO+1 SS
1 SS
Delayed
-
-
-
-
-
-
-
3 NO
SIGNALING CIRCUITS
Relay
1 NC
1 NC
-
1 NC
1 NC
-
1 NC
-
Solid-state
-
-
-
-
-
-
-
-
Max. achievable SIL acc. to
IEC 61508 / IEC 62061
3 3 2 2 2 3 as BU as BU
Max. achievable PL acc. to
EN ISO 13849-1
e e d d d e as BU as BU
NO = normally-open; SS = solid-state; NC = normally-closed; as BU = as basic unit
Description of the individual safety relays
3.2 Overview
3TK28 safety relays
16 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK28 speed/standstill monitoring
3TK28..
10-0
10-1
SENSORS
Electromechanical X X
Solid-state
-
X
Magnetically-operated switches - X
START TYPE
Auto
X
X
Monitored
-
X
ENABLING CIRCUITS
Instantaneous
3 NO + 1 NC
2 NO
Delayed
-
-
SIGNALING CIRCUITS
Relay
1 CO
Solid-state
2
2
Achievable SIL / PL
Max. achievable SIL acc. to
IEC 61508 / IEC 62061
3 3
Max. achievable PL acc. to
EN ISO 13849-1
e e
SENSORS
Without sensors
X
-
Sensors
-
PNP, NPN, HTL, TTL, SIN/COS, NAMUR
NO = normally-open; SS = solid-state; NC = normally-closed; CO = changeover
You will find further information on 3TK2810-1 speed/standstill monitors in Manual 3TK2810-
1 safety-related speed monitor
(http://support.automation.siemens.com/WW/view/en/43707376)
Description of the individual safety relays
3.2 Overview
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 17
3TK28 multifunctional devices
3TK28..
26
45
SENSORS
Electromechanical X X
Solid-state
X
X
Magnetically-operated switches X X
START TYPE
Auto
X
X
Monitored
X
X
ENABLING CIRCUITS
Instantaneous
See manual
3TK2826
See manual
3TK2845
Delayed
SIGNALING CIRCUITS
Relay
See manual
3TK2826
See manual
3TK2845
Solid-state
Max. achievable SIL acc. to
IEC 61508 / IEC 62061
3 3
Max. achievable PL acc. to
EN ISO 13849-1
e e
You will find further information on 3TK2826 in Manual 3TK2826
(http://support.automation.siemens.com/WW/view/en/24044904)
You will find further information on 3TK2845 in Manual 3TK2845
(http://support.automation.siemens.com/WW/view/en/25613330)
You will find comprehensive help with selecting products in Catalog IC10
(www.siemens.com/industrial-controls/catalogs)
Description of the individual safety relays
3.3 General technical data
3TK28 safety relays
18 Manual, 07/2016, NEB926157502000/RS-AB/003
3.3
General technical data
Technical data valid for all 3TK28 products in this manual.
Product brand name
SIRIUS
Product designation
Safety relay
Version of the product
for EMERGENCY STOP and protective doors
Installation environment with respect to EMC
The 3TK products are only suitable for Class A
environments. These devices can cause unwanted radio
interference in residential environments. The user is
required to implement appropriate measures in this
case.
IP degree of protection of the housing
IP40
IP degree of protection of the terminal
IP20
Touch protection against electric shock
V
Safe from finger-touch
Hardware failure tolerance / according to IEC 61508
1
Ambient temperature
•
during storage
•
during operation
°C
-40 ... +80
-25 ... +60
Atmospheric pressure
•
according to SN 31205
hPa
900 ... 1060
Relative air humidity
•
during operation
%
10 ... 95
Maximum operating altitude above MSL
m
2000
Vibration resistance according to IEC 60068-2-6
5 ... 500 Hz: 0.75 mm
Shock resistance
15g / 11 ms
Rated impulse strength
V 4000
Mounting position
Any
Type of fixing
Snap-on mounting
Type of electrical connection
3TK28..-1....
screw-type
3TK28..-2....
spring-loaded
Certificate of suitability
•
TÜV / BG approval
•
UL certification
Yes
Yes
You will find further technical data in the Technical Data chapters of each product and in the
Dimension Drawings chapter.
Description of the individual safety relays
3.4 Cable lengths
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 19
3.4
Cable lengths
The cable lengths specified in the table are valid for a cable cross-section of 1.5 mm².
Sensor - evaluation unit distance for 3TK28 devices
Sensor - evaluation unit distance
in meters (1-channel)
Sensor - evaluation unit distance
in meters (2-channel)
3TK2805 150 150
3TK2806
150
150
3TK2820 (DC)
1000
1000
3TK2820 (AC)
1000
1000
3TK2821
1000
500
3TK2822 / 23
-
500
3TK2824 (DC) 1000 500
3TK2824 (AC)
1000
500
3TK2825
1000
500
3TK2827 / 28
1000
500
3TK2830-.CB30
1000 *
500
3TK2830-.AJ20
300 *
150
3TK2830-.AL20
80 *
40
3TK2834
-
500
3TK2840
2000
2000
3TK2841 2000 2000
3TK2842
2000
2000
3TK2850 / 51 / 52
2000
2000
3TK2853
2000
2000
3TK2856 / 57
1000*
-
* only for protected installation if not in the same switchboard as the basic unit
Description of the individual safety relays
3.5 General information about enabling and signaling circuits
3TK28 safety relays
20 Manual, 07/2016, NEB926157502000/RS-AB/003
3.5
General information about enabling and signaling circuits
Relay enabling circuits:
When a safety function is requested or a fault detected, the 3TK28 safety relays enter the
safe state. This means:
Relay enabling circuits with NO function OPEN
Relay enabling circuits with NC function CLOSE
Relay signaling circuits:
Relay signaling circuits always have NC functionality with 3TK28 devices.
Relay signaling circuits thus always operate inversely with respect to the relay enabling
circuits with NO functionality.
Solid-state enabling circuits:
Solid-state enabling circuits in 3TK28 safety-related devices always operate according to the
NO principle.
When a safety function is requested or a fault detected, the 3TK28 safety relays enter the
safe state. This means:
Solid-state enabling circuits switch to the inactive state.
Solid-state signaling circuits:
Solid-state signaling circuits in 3TK28 safety relays signal the state of the enabling circuits
(==> functioning synchronously with the solid-state enabling circuits).
When a safety function is requested or a fault detected, the 3TK28 safety relays enter the
safe state. This means:
Solid-state signaling circuits switch to the inactive state.
Contactor enabling circuits:
When a safety function is requested or a fault detected, the 3TK28 safety relays enter the
safe state. This means:
Contactor enabling circuits with NO function OPEN
Contactor enabling circuits with NC function CLOSE
Contactor signaling circuits:
Contactor signaling circuits always have NC functionality with 3TK28 devices.
Contactor signaling circuits thus always operate inversely with respect to the contactor
enabling circuits with NO functionality.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 21
3.6
3TK28 safety relays with relay enabling circuits
3.6.1
3TK2810-0 safety relay
3.6.1.1
Applications
Applications of the 3TK2810-0 safety relay
You can use the 3TK2810-0 safety relays for safety standstill detection on 3-phase and
1-phase induction motors, e.g. to disengage protective door release mechanisms on
machine tools or to activate stopping brakes.
3.6.1.2
Description of function and connection information
The 3TK2810-0 safe standstill monitor measures a voltage of the coasting motor induced by
remanent magnetization at 3 terminals of the stator winding.
If the induction voltage approaches 0, this means motor standstill for the device and the
output relay is activated.
To enable adaptation of the device to the most varied types of motors and applications, the
voltage threshold Uan, below which the 3TK2810-0 detects standstill, can be set. The
duration for which Uan must be undershot to detect standstill definitively and enable the
output circuit can also be set (standstill time ts).
The device also detects wire break between the measurement inputs L1 / L2 / L3. If a wire
break is detected, the output relay goes into the safe position (as it does when the motor is
running). This state is stored and can be cleared by (briefly) jumpering terminals X2 - X3. X1
- X2: Feedback circuit for connecting external contactors (NC contact). If the feedback circuit
is not required, terminals X1 - X2 must be jumpered; otherwise a fault will be signaled.
WARNING
Hazardous voltage!
Can cause electric shock and burns.
The control terminals X1 / X2 / X3 are not electrically isolated from the measurement inputs
L1 / L2 /L3.
For this reason only use floating contacts for the control terminals.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
22 Manual, 07/2016, NEB926157502000/RS-AB/003
Device properties
● PLe per EN ISO 13849-1; SIL 3 per IEC 61508 / IEC 62061
● Wire-break detection in the measurement circuit
● Positive-action safe output contacts: 3 NO contacts, 1 NC contact for 250 V AC
● 2 semiconductor signaling outputs
● 1 changeover signaling output
● Settable voltage threshold Uan
● Settable standstill time ts
● LED displays for motor standstill, wire break, and operating voltage
● Suitable for use with frequency converters
Practical note (operation with frequency converter)
A frequency converter generates an offset during braking (DC component). This can be
detected as a wire break and stored by the standstill monitor. The same operation also
occurs during DC braking.
The enabling circuits are only released when:
● braking has ended, i.e. the standstill monitor no longer detects a DC component (-> motor
stopped) and control terminals X2 - X3 are jumpered.
● or a manual reset is performed via these terminals.
If the 3TK2810 is used with a frequency converter, terminals X2 - X3 must be jumpered or a
manual reset must be performed before restart.
Use of control terminals X1 / X2 / X3
● Feedback circuit X1-X2: Use a floating contact here that provides appropriate isolation for
the level of maximum measurement input voltage (motor voltage).
● Reset X3-X2: For instance, if you control terminal X3 from a PLC via a coupling relay, use
a floating contact here that provides appropriate isolation for the level of maximum
measurement input voltage (motor voltage).
WARNING
Hazardous voltage!
Can cause electric shock and burns.
The control terminals X1 / X2 / X3 are not electrically isolated from the measurement inputs
L1 / L2 /L3.
For this reason only use floating contacts for the control terminals.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 23
3.6.1.3
Structure of the 3TK2810-0
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③
Time setting
④ Labels
3.6.1.4
Terminal assignment
Terminal
Description
A1
L/+ control supply voltage U
s
A2
N/- control supply voltage Us
A3
24 V DC power supply to signaling outputs
A4
Ground for signaling outputs
L1, L2, L3
Signal inputs
X1, X2, X3
Control terminals
11, 12
NC contact, positive-action, enabling circuit
23, 24; 33, 34; 43, 44
NO contact, positive-action, enabling circuit
51, 52, 54
Signaling output, changeover contact
64
Signaling output "enable"
74
Signaling output "fault"
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
24 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.1.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● DEVICE
– lights up green during operation
– lights up red on internal device faults
● OUT
– lights up yellow on EMF > Uan
– flashes green when ts elapses
– green steady light on enabling the output contacts
● SF
– flashes on faults in the measurement and feedback circuit and on insufficient auxiliary
voltage UH (see flashing code)
LED flashing codes of the red LEDs "SF" in order of priority
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 25
3.6.1.6
State diagram 3TK2810-0
Figure 3-1 tE: Detection time after wire break
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
26 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.1.7
Technical data 3TK2810-0
3TK2810-0G...
3TK2810-0B...
EMC emitted interference
IEC 61000-6-2, IEC 61000-6-3
Item designation
• according to DIN 40719 extendable after
IEC 204-2 according to IEC 750 KT
• according to DIN EN 61346-2 F
Number of sensor inputs
1-channel or
2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
measuring inputs
Product feature
transverse contact-secure
No
Safety Integrity Level (SIL)
according to
IEC 61508
SIL3
SIL claim limit (for a subsystem)
according to
EN 62061
3
Safety integrity level (SIL)
for delayed release
circuit according to IEC 61508
SIL3
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to
ISO 13849-1 e
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour
(PFHD)
with high demand rate
according to
EN 62061
1/h
0.0000000015
T1 value
for proof test interval or service life
according to IEC 61508
a 20
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 27
3TK2810-0G...
3TK2810-0B...
Number of outputs
as contact-affected switching
element as NO contact safety-related
• as contact-affected switching element as NC
contact for reporting function instantaneous
switching
2
• as contact-affected switching element as NO
contact safety-related instantaneous switching 4
• as contact-affected switching element as NO
contact safety-related delayed switching 0
• as contact-less semiconductor switching
element
– for reporting function
– non-delayed 2
– delayed switching 0
– safety-related
– non-delayed 0
– delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input No
Design of the electrical connection
jumper
socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 3
– at DC-13 at 24 V A 2
• of the NC contacts of the relay outputs at
AC-15
– at 115 V A 2
– at 230 V A 2
Thermal current
of the contact-affected switching
element maximum
A 5
Electrical operating cycles as operating time
typical
200 000
Mechanical operating cycles as operating time
typical
50 000 000
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
28 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2810-0G...
3TK2810-0B...
Design of the fuse link
for short-circuit
protection of the NO contacts of the relay
outputs required
quick: 5 A
Type of voltage
of the controlled supply
voltage
AC DC
Control supply voltage frequency 1 rated value
Hz
50
—
Control supply voltage frequency 2 rated value
Hz
60
—
Control supply voltage
1
for DC
final rated
value
• for DC rated value V — 24
Operating range factor control supply voltage
rated value of the magnet coil
• at 50 Hz for AC
– initial value 0.8 —
– final value 1.1 —
• at 60 Hz for AC
– initial value 0.8 —
– final value 1.1 —
• for DC
—
0.9
—
1.2
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 29
3TK2810-0G...
3TK2810-0B...
Product function
• automatic start No
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed
contact-Normally open contact
No
• magnetic switch monitoring Normally closed
contact-Normally closed contact
No
• emergency stop function No
• protective door monitoring No
• standstill monitoring Yes
• step mat monitoring No
• monitored start-up No
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring No
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring No
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
30 Manual, 07/2016, NEB926157502000/RS-AB/003
Input data (L1-L2-L3)
Measurement/motor voltage
V Max. 690 AC (IEC), max. 600 AC (UL)
Input resistances
kΩ
Approx. 400
Reponse value Uan
mV Approx. 20 ... 400; settable
Standstill time ts
s
0.2 ... 6, settable
Figure 3-2 Derating table
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 31
3.6.1.8
Connection examples 3TK2810-0
*
Motor contactors
Figure 3-3 Without evaluation of the feedback circuit
*
Motor contactors
Figure 3-4 With evaluation of the feedback circuit
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
32 Manual, 07/2016, NEB926157502000/RS-AB/003
①
With jumper between X2-X3 for automatic acknowledgment of open-circuit detection
Figure 3-5 Use of the 3TK2810-0 standstill monitor in a wye-delta connection
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 33
3.6.2
3TK2820 safety relay
3.6.2.1
Applications
Applications of the 3TK2820 safety relay
You can use the 3TK2820 safety relay in EMERGENCY STOP devices according to
DIN EN ISO 13850 and in safety circuits according to VDE 0113-1 or DIN EN 60204-1, e.g.
for movable guards and protective doors.
Depending on the external circuitry, SILCL 3 in accordance with IEC 62061 or PLe in
accordance with EN 13849-1 can be achieved. Depending on the hazard assessment,
additional measures may be necessary in the sensor circuit (e.g. protected cable
installation).
When the safety relay is used in "automatic start" mode, automatic restart (acc. to
EN 60204-1, section 9.2.5.4) after shutdown in an emergency (EMERGENCY STOP) must
be prevented by suitable means.
3.6.2.2
Description of function and connection information
The 3TK2820 safety relay has three enabling circuits (safe circuits, NO) and one signaling
circuit (non-safe, NC). The number of enabling circuits can be increased by adding one or
more 3TK2830 expansion blocks. Two LEDs indicate the operating state of the device.
The devices also monitor the sensor circuits for cross-circuits. This is done based on various
potentials in the sensor circuits.
When the EMERGENCY STOP buttons or limit switches are released and the ON button is
pressed, the internal circuit of the safety relay and the external contactors are monitored to
ensure that they are functioning correctly.
Connect the EMERGENCY STOP button or the limit switch at terminals T1/IN1 and T2/IN2.
The ON button is connected in series with the NC contacts of the external contactors
(feedback circuit) at terminals T3/IN3.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
34 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.2.3
Structure 3TK2820
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③
Selector switch
④ Labels
3.6.2.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
IN1
Sensor channel 1
IN2
Sensor channel 2
IN3
ON button, feedback circuit
T1
Test output 1 (for IN1)
T2
Test output 2 (for IN2)
T3
Test output 3 (for IN3)
13 - 14 Enabling circuit 1 (NO, relay contact)
23 - 24
Enabling circuit 2 (NO, relay contact)
33 - 34
Enabling circuit 3 (NO, relay contact)
41 - 42
Signaling circuit (NC, relay contact)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 35
3.6.2.5
Display of the operating state
Two LEDs and a slide switch indicate the operating state and functioning of the device:
● DEVICE
● OUT
Operating state of 3TK2820
LED
Operation
DEVICE OUT Line supply EMERGENCY
STOP
ON Enabling circuit
On Not pressed Pressed Closed
Pressed
Not pressed
Open
Not pressed
Not pressed
Open
Fault
Fault in sensor circuit
Open
= off
= on
Selector switch
Start
Up
Automatic start
Down Monitored start
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
36 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.2.6
Installation 3TK2820
Warning notices
Warning notices before installation, wiring, and commissioning
WARNING
Hazardous voltage! Can cause electric shock and burns. Turn off and lock out all power
supplying this device before working on this device.
Mounting the device on a DIN rail
Requirements
● At the installation location, a horizontal 35 mm mounting rail in accordance with
DIN EN 60715 is properly secured
● Please observe the information about the mounting position in Chapter "General technical
data (Page 18)"
DIN rail mounting procedure
Step
Operating instruction
Figure
1 Hang the back of the device onto the upper
edge of the DIN rail
2 Press the lower half of the device against the
DIN rail until the device engages
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 37
Disassembling the device
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Requirements
● All system interface connections are terminated.
● The terminal blocks have been removed or disconnected.
Disassembling the device from a DIN rail
Step
Operating instruction
Figure
1
Unlock the device using a screwdriver
2 Pull the lower half of the device away from
the DIN rail.
3 Lift the device from the upper edge of the
DIN rail.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
38 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.2.7
Connection 3TK2820
Connection data for terminal blocks
Specification and value
in the case of removable
terminal blocks with screw-
type terminals
Specification and value
in the case of removable terminal blocks with spring-
loaded terminals
Screwdriver
Cross-tip screwdriver
Size: PZ 1 (⌀ 4 mm)
Torque: 0.8 … 1.2 Nm
Screwdriver
Size: 0 or 1 (width to 3 mm) for raising the terminal
springs
DIN 5264-A; 0.5 x 3
Rigid cable
A = 8mm
1 x 0.5 ... 2.5 mm2
1 x AWG 20 to 14
2 x 0.5 ... 1.5 mm2
2 x AWG 20 to 16
A = 10 mm
1 x 0.5 ... 2.5 mm2
1 x AWG 20 to 14
A = 12 mm
1 x 0.5 ... 4 mm2
1 x AWG 20 to 12
Flexible cable with end
sleeve/cable lug
A = 8 mm
1 x 0.5 ... 2.5 mm2
1 x AWG 20 to 14
2 x 0.5 ... 1.0 mm2
2 x AWG 20 to 18
A = 10 mm
1 x 0.5 ... 1.5 mm2
1 x AWG 20 to 16
A = 12 mm
1 x 0.5 ... 2.5 mm2
1 x AWG 20 to 14
Flexible cable
A = 8 mm
1 x 0.5 ... 2.5 mm2
1 x AWG 20 to 14
2 x 0.5 ... 1.5 mm2
2 x AWG 20 to 16
A = 10 mm
1 x 0.5 ... 2.5 mm2
1 x AWG 20 to 14
A = 12 mm
1 x 0.5 ... 4 mm2
1 x AWG 20 to 12
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 39
Connecting terminal blocks
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Procedure for screw-type terminal blocks
Step
Operating instruction
1
Insert the relevant cable into square on the screw-type terminal until it engages.
2
Hold the cable in the screw-type terminal.
3
Tighten the screw of the terminal in which the cable is inserted.
4
Pull on the cable to ensure it is screwed tight.
Procedure for spring-loaded terminal blocks
Step
Operating instruction
Figure
1 To release the clamping springs, insert the flat-head
screwdriver as far as it will go into the square opening of
the spring-loaded terminal. Please observe a 10°
horizontal angular deviation of the screwdriver to the oval
opening.
2
Insert the cable into the oval opening as far as it will go.
3
Hold the cable in the spring-loaded terminal.
4 Remove the screwdriver.
5 Pull on the cable to ensure it is tight.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
40 Manual, 07/2016, NEB926157502000/RS-AB/003
Disconnecting
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Removing terminal blocks from the device
Step
Operating instruction
Figure
1 Insert a flat-head screwdriver between the clip
of the terminal block and the front panel
①
.
2 Lift the terminal block out of the guiderail of
the device ②
Disconnecting screw-type terminals
Step
Operating instruction
1
Unscrew the screw of the screw-type terminal.
2
Remove the cable from the unscrewed screw-type terminal.
Disconnecting spring-loaded terminals
Step
Operating instruction
1 Insert the flat-head screwdriver into the square opening of the spring-loaded terminal until it engages. Please
observe a 10° horizontal angular deviation of the screwdriver to the oval opening.
2
Remove the cable from the oval opening.
3
Remove the screwdriver.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 41
Plugging in terminal blocks
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Requirements
You must have removed the terminal blocks, for the purpose of replacing a device, for
example.
Procedure when plugging in the terminal blocks
Step
Operating instruction
Figure
1 Insert the removable terminal block into the
guiderail of the device.
2 Check that the clip of the removable terminal
block closes flush with the front panel.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
42 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.2.8
Technical data 3TK2820
3TK2820-.AJ..
3TK2820-.AL..
3TK2820-.CB..
EMC emitted interference
IEC 60947-5-1, IEC 61000
Item designation
• according to DIN 40719 extendable after
IEC 204-2 according to IEC 750
—
• according to DIN EN 61346-2 F
Number of sensor inputs
1-channel or
2-channel
1
Design of the cascading
—
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature
transverse contact-secure
Yes
Safety Integrity Level (SIL)
according to
IEC 61508
SIL3
SIL claim limit (for a subsystem)
according to
EN 62061
3
Safety integrity level (SIL)
for delayed release
circuit according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to
ISO 13849-1
—
Category
• according to EN 954-1 —
• according to ISO 13849-1 4
Safety device type
according to IEC 61508-2
Type A
Probability of dangerous failure per hour
(PFHD)
with high demand rate
according to
EN 62061
1/h 0.00000000094
T1 value
for proof test interval or service life
according to IEC 61508
a 20
Number of outputs
as contact-affected
switching element as NO contact safety-related
• as NC contact for reporting function
instantaneous switching
1
• as NO contact safety-related instantaneous
switching
3
• as NO contact safety-related delayed
switching
0
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 43
3TK2820-.AJ..
3TK2820-.AL..
3TK2820-.CB..
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching —
• feedback input Yes
• start input Yes
Design of the electrical connection
jumper
socket
No
Switching capacity current
• at AC-15 at 24 V A 4
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 4
– at DC-13 at 24 V A 4
• of the NC contacts of the relay outputs
at AC-15
– at 115 V A 4
– at 230 V A 4
Thermal current
of the contact-affected
switching element maximum
A 5
Electrical operating cycles as operating time
typical
200 000
Mechanical operating cycles as operating time
typical
10 000 000
Design of the fuse link
for short-circuit
protection of the NO contacts of the relay
outputs
required
gL/gG: 10 A or quick-response: 10 A or MCB type
B: 2 A or MCB type C: 1.6 A or SITOP select
diagnostics module (order No.: 6EP1961-2BA00)
Type of voltage
of the controlled supply
voltage
AC AC/DC
Control supply voltage frequency
1
rated
value
Hz 50
Control supply voltage frequency
2
rated
value
Hz 60
Control supply voltage
1
for DC
final rated
value
• for DC rated value V — 24
Operating range factor control supply voltage
rated value
of the magnet coil
• at 50 Hz for AC
0.85
1.1
• at 60 Hz for AC
0.85
1.1
• for DC — 0.85
— 1.2
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
44 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2820-.AJ..
3TK2820-.AL..
3TK2820-.CB..
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed
contact-Normally open contact
No
• magnetic switch monitoring Normally closed
contact-Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring No
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring Yes
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 45
3.6.2.9
Connection examples 3TK2820
Figure 3-6 Autostart (2-channel)
Figure 3-7 Monitored start (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
46 Manual, 07/2016, NEB926157502000/RS-AB/003
Figure 3-8 Autostart (1-channel)
Figure 3-9 Monitored start (1-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 47
3.6.3
3TK2822 / 3TK2823 safety relays
3.6.3.1
Applications
Applications of the 3TK2822/23 safety relay
You can use the 3TK2822 safety relay in safety circuits according to DIN EN / IEC 60204-1,
e.g. on movable guards and protective doors.
You can use the 3TK2823 safety relay in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5. Depending on the external circuitry, a maximum performance level
PLe/Cat. 4 in accordance with DIN EN ISO 13849-1 or SILCL 3 in accordance with
DIN EN/IEC 62061 can be achieved with this device.
3.6.3.2
Description of function
The 3TK2822/23 safety relays have two instantaneous redundant enabling circuits with NO
functions. The enabling circuits are for the safety-related deactivation of actuators.
Diagnostics is performed using three LEDs.
The 3TK2822/23 safety relays are suitable for monitoring actuator and sensor circuits
according to DIN EN / IEC 60204-1 in "Autostart" or "Monitored start" mode (depending on
device variant).
When the EMERGENCY STOP buttons are released or position switches operated and the
ON button is pressed, the internal circuit of the safety relay and the external contactors are
monitored to ensure that they are functioning correctly.
If monitoring results in a fault-free state, it is possible to start the device using the ON button
(in "monitored start" mode). This closes the enabling circuits. In "Autostart" mode, starting
and therefore closing the enabling circuits is initiated directly after closure of the sensor
contacts upon detection of the fault-free state.
The number of enabling circuits can be increased by adding one or more 3TK2830
expansion blocks.
With the safety relays, the ON circuit Y33/34 is checked for short-circuit. That means it is
identified as a fault if Y33/34 is closed before the EMERGENCY STOP button is reset.
The devices also monitor the sensor circuits for cross-circuits. This is done based on various
potentials in the sensor circuits.
3.6.3.3
Connection advice
Connect the EMERGENCY STOP button or the limit switch to terminals Y11, Y12, Y21, and
Y22. Connect the ON button in series with the NC contacts of the external contactors
(feedback circuit) to terminals Y33, Y34. (See Chapter Connection examples 3TK2822 /
3TK2823 (Page 54)).
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
48 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.3.4
Structure 3TK2822/23
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.6.3.5
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y11; Y12
Channel 1, EMERGENCY STOP or limit switch
Y21; Y22
Channel 2, EMERGENCY STOP or limit switch
Y33; Y34
On button, feedback circuit
13 - 14
Enabling circuit 1, (NO)
23 - 24
Enabling circuit 2, (NO)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 49
3.6.3.6
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● CHANNEL 1
● CHANNEL 2
Operating states of 3TK2822/23
= off
= on
LED
Operation
POWER CHANNEL 1 CHANNEL 2 Line supply EMERGENCY
STOP
ON Enabling circuit
On Not pressed Pressed Closed
Pressed
Not pressed
Open
Not pressed
Not pressed
Open
Fault
• Relay welded
• Motor contactor welded
• Fault in electronics
• Short-circuit in ON circuit (on 3TK2823 only)
Open
Cross-circuit in EMERGENCY STOP circuit
(minimum fault current IKmin = 0.5 A; PTC fuse
responds) or no supply voltage
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
50 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.3.7
State diagrams 3TK2822 / 3TK2823
Figure 3-10 State diagram 3TK2822
Figure 3-11 State diagram 3TK2823
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 51
3.6.3.8
Technical data 3TK2822 / 3TK2823
3TK2822-.....
3TK2823-.....
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
—
Design of the cascading
none
Type of the safety-related wiring of the inputs
two-channel
Product feature transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem)
according to EN
62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with
high demand rate according to EN 62061
1/h 0.0000000013
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Number of outputs
as contact-affected switching element
as NO contact safety-related
• as NC contact for reporting function instantaneous
switching
0
• as NO contact safety-related instantaneous switching 2
• as NO contact safety-related delayed switching 0
Stop category
according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
52 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2822-.....
3TK2823-.....
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 5
– at DC-13 at 24 V A 5
• of the NC contacts of the relay outputs at AC-15
– at 115 V A —
– at 230 V
A
—
Thermal current
of the contact-affected switching element
maximum
A 5
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time typical
10 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs
required
gL/gG: 6 A, or quick: 10 A
Type of voltage of the controlled supply voltage
AC/DC
Control supply voltage frequency 1 rated value
Hz
50
Control supply voltage frequency 2 rated value
Hz
60
Control supply voltage 1 for DC final rated value
• for DC rated value V 24
Operating range factor control supply voltage rated value
of the magnet coil
• at 50 Hz
– for AC
0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
0.85
1.2
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 53
3TK2822-.....
3TK2823-.....
Product function
• automatic start Yes No
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
No
• emergency stop function No Yes
• protective door monitoring Yes No
• standstill monitoring No
• step mat monitoring Yes
• monitored start-up No Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring No Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Utilization category
acc. to VDE0660-200,
DIN EN / IEC 60947-5-1
Rated operational voltage
Ue [V]
Rated operational current Ie [A]
if all enabling circuits are loaded
50 °C 60 °C 70 °C
AC-15
230
5
4.5
4
DC-13
24
5
4.5
4
115
0.2
0.2
0.2
230
0.1
0.1
0.1
Continuous current I
th
5
4.5
4
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
54 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.3.9
Connection examples 3TK2822 / 3TK2823
Figure 3-12 Autostart (2-channel)
Figure 3-13 Monitored start (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 55
3.6.4
3TK2821 / 3TK2824 safety relays
3.6.4.1
Applications
Applications of the 3TK2821/24 safety relay
You can use the 3TK2821/24 safety relays in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, as a basic
unit or contact extension.
With the device, a maximum performance level PLe/Cat. 4 in accordance with
DIN EN ISO 13849-1 or SILCL 3 in accordance with DIN EN/IEC 62061 can be achieved.
Depending on the hazard assessment, additional measures may be necessary in the sensor
circuit (e.g. protected cable installation). If the 3TK2821/24 is used as a contact extension,
the achievable PL / Cat. / SIL is equivalent to that of the basic unit.
Table 3- 1 Achievable SIL CL/PL/Cat. in applications
1-channel
2-channel
Contact extension
SIL (DIN EN / IEC 61508)
1
1 (2)*
3
PL (DIN EN ISO 13849)
c
c (d)*
e
Cat. (DIN EN ISO 13849)
1
1
4
* PL d or Cat 4 can only be achieved if faults can be ruled out for the positive opening
contacts (to IEC 60947-5-1 Annex K) and for the mechanical system. In the sensor circuit,
DC = 0.
3.6.4.2
Description of function and connection information
The 3TK2821 safety relay has three enabling circuits (safe circuits) as NO circuits and a
signaling circuit as an NC circuit.
The 3TK2824 safety relay has two enabling circuits (safe circuits) as NO circuits.
The number of enabling circuits can be increased by adding one or more 3TK2830
expansion blocks.
The operating state and functioning are indicated by three LEDs.
When the EMERGENCY STOP buttons or limit switches are released and the ON button is
pressed, the internal circuit of the safety relay and the external contactors are monitored to
ensure that they are functioning correctly.
Connect the EMERGENCY STOP button or the limit switch in the supply cable between A1
and +24 V or in the supply cable of the A1 terminal (L/+24 V DC). If evaluation is to take
place via two channels, then connect channel 2 between A2 and 0 V or N. Connect the ON
button in series with the NC contacts of the external contactors (feedback circuit) to the
terminals Y1, Y2.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
56 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.4.3
Structure 3TK2821/24
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.6.4.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y1; Y1
On button, feedback circuit
13; 14
Enabling circuit 1, (NO)
23; 24
Enabling circuit 1, (NO)
33; 34
Enabling circuit 1, (NO) (3TK2821 only)
41; 42
Signaling circuit 1, (NC) (3TK2821 only)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 57
3.6.4.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● CHANNEL 1
● CHANNEL 2
Operating states of 3TK2821/24
= off
= on
LED
Operation
POWER CHANNEL 1 CHANNEL 2 Line
supply
EMERGENCY
STOP
ON Enabling circuit
On Not pressed Pressed Closed
Pressed
Not pressed
Open
Not pressed
Not pressed
Open
Fault
• Relay welded
• Motor contactor welded
• Fault in electronics
Open
Cross-circuit or ground fault in EMERGENCY
STOP circuit (minimum fault current IKmin = 0.5 A;
PTC fuse responds) or no supply voltage
3.6.4.6
State diagrams 3TK2821 / 3TK2824
Figure 3-14 State diagram 3TK2821/24
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
58 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.4.7
Technical data 3TK2821 / 3TK2824
3TK2821-.C...
3TK2824-.B...
3TK2824-.C...
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after
IEC 204-2 according to IEC 750 KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel or single-channel and two-channel
Product feature transverse contact-secure
No
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem)
according to
EN 62061
1
Safety integrity level (SIL)
for delayed release
circuit according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO
13849-1 —
Category
• according to EN 954-1 3
• according to ISO 13849-1 3 2
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with high demand rate according to EN 62061
1/h 0.0000000011 0.00000000087
T1 value
for proof test interval or service life
according to IEC 61508
a 20
Number of outputs
as contact-affected switching
element as NO contact safety-related
• as NC contact for reporting function
instantaneous switching 1 0
• as NO contact safety-related instantaneous
switching 3 2
• as NO contact safety-related delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 59
3TK2821-.C...
3TK2824-.B...
3TK2824-.C...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 5 6
– at DC-13 at 24 V A 5 6
• of the NC contacts of the relay outputs at
AC-15
– at 115 V A 5 —
– at 230 V A 5 —
Thermal current
of the contact-affected switching
element
maximum
A 5
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time
typical
10 000 000
Design of the fuse link
for short-circuit protection
of the NO contacts of the relay outputs required
gL/gG: 6 A, or quick: 10 A
Type of voltage
of the controlled supply voltage
AC/DC DC AC/DC
Control supply voltage frequency 1 rated value
Hz
50
—
50
Control supply voltage frequency 2 rated value
Hz
60
—
60
Control supply voltage 1 for DC final rated value
• for DC rated value V 24
Operating range factor control supply voltage rated
value
of the magnet coil
• at 50 Hz
– for AC 0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
0.85
1.2
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
60 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2821-.C...
3TK2824-.B...
3TK2824-.C...
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed
contact-Normally open contact
No
• magnetic switch monitoring Normally closed
contact-Normally closed contact
No
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring No
• monitored start-up No
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Utilization category
acc. to VDE0660-200,
DIN EN / IEC 60947-5-1
Rated operational voltage
Ue [V]
Rated operational current Ie [A]
if all enabling circuits are loaded
50 °C 60 °C 70 °C
AC-15
230
5
4.5
4
DC-13
24
5
4.5
4
115
0.2
0.2
0.2
230
0.1
0.1
0.1
Continuous current I
th
5
4.5
4
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 61
3.6.4.8
Connection examples 3TK2821 / 3TK2824
Figure 3-15 EMERGENCY STOP (1-channel)
Figure 3-16 EMERGENCY STOP (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
62 Manual, 07/2016, NEB926157502000/RS-AB/003
Figure 3-17 Protective door monitoring (1-channel)
Figure 3-18 Protective door monitoring (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 63
Figure 3-19 3TK2821 as contact extension
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
64 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.5
3TK2824-.A.20 safety relay
3.6.5.1
Applications
Applications of 3TK2824-.A.20 safety relay
You can use the 3TK2824-.A.20 safety relay in EMERGENCY STOP devices according to
DIN EN ISO 60947-5-5 and in safety circuits according to DIN EN IEC 60204-1, e.g. for
movable guards and protective doors. With the device, a maximum performance level
PLc/Cat. 1 in accordance with DIN EN ISO 13849-1 or SILCL 1 in accordance with
DIN EN/IEC 62061 can be achieved. Depending on the hazard assessment, additional
measures may be necessary in the sensor circuit (e.g. protected cable installation). When
the safety relay is used in "automatic start" mode, automatic restart (acc. to
DIN EN IEC 60204-1, Sections 9.2.5.4.2 and 10.8.3) after shutdown in an emergency
(EMERGENCY STOP) must be prevented by the higher-level control.
Table 3- 2 Achievable SIL CL/PL as an evaluation unit
1-channel
2-channel
SILCL (in accordance with IEC 62061)
1
1
PL (DIN EN ISO 13849) c c
Cat. (DIN EN ISO 13849)
1
1
3.6.5.2
Description of function and connection information
The 3TK2824 safety relay has two enabling circuits (safe circuits) as NO circuits. The
number of enabling circuits can be increased by adding one or more 3TK2830 expansion
blocks. The operating state and functioning are indicated by three LEDs.
When the EMERGENCY STOP buttons or limit switches are released and the ON button is
pressed, the internal circuit of the safety relay and the external contactors are monitored to
ensure that they are functioning correctly.
Connect the EMERGENCY STOP button or the limit switch to terminals Y11, Y12 and Y21,
Y22. The ON button is connected in series with the NC contacts of the external contactors
(feedback circuit) at terminals Y33, Y34.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 65
3.6.5.3
Structure 3TK2824-.A.20
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.6.5.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y11; Y12
Channel 1, EMERGENCY STOP or limit switch
Y21; Y22
Channel 2, EMERGENCY STOP or limit switch
Y33; Y34
On button, feedback circuit
13 - 14
Enabling circuit 1, (NO)
23 - 24
Enabling circuit 2, (NO)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
66 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.5.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● CHANNEL 1
● CHANNEL 2
Operating states of 3TK2824-.A.20
= off
= on
LED
Operation
POWER CHANNEL 1 CHANNEL 2 Line supply EMERGENCY
STOP
ON Enabling circuit
On Not pressed Pressed Closed
Pressed
Not pressed
Open
Not pressed
Not pressed
Open
Fault
• Relay welded
• Motor contactor welded
• Fault in electronics
Open
Cross-circuit in EMERGENCY STOP circuit or no
supply voltage
3.6.5.6
State diagrams 3TK2824-.A.20
Figure 3-20 State diagram 3TK2824-.A.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 67
3.6.5.7
Technical data 3TK2824-.A.20
3TK2824-.A...
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring
of the inputs
single-channel or single-channel and
two-channel
Product feature
transverse contact-secure
No
Safety Integrity Level (SIL) according to IEC 61508
SIL2
SIL claim limit (for a subsystem) according to EN 62061
1
Safety integrity level (SIL)
for delayed release circuit
according
to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 d
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 3
• according to ISO 13849-1 2
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.00000000087
T1 value
for proof test interval or service life
according to
IEC 61508
a 20
Number of outputs
as contact-affected switching element
as
NO contact safety-related
• as NC contact for reporting function instantaneous switching 0
• as NO contact safety-related instantaneous switching 2
• as NO contact safety-related delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
68 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2824-.A...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 6
– at DC-13 at 24 V A 6
• of the NC contacts of the relay outputs at AC-15
– at 115 V A —
– at 230 V
A
—
Thermal current
of the contact-affected switching element
maximum
A 5
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time typical
10 000 000
Design of the fuse link
for short-circuit protection of the NO
contacts of the relay outputs
required
gL/gG: 6 A, or quick: 10 A
Type of voltage of the controlled supply voltage
AC
Control supply voltage frequency 1 rated value
Hz
50
Control supply voltage frequency 2 rated value
Hz
60
Control supply voltage 1 for DC final rated value
• for DC rated value V —
Operating range factor control supply voltage rated value
of
the magnet coil
• at 50 Hz
– for AC
0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
—
—
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 69
3TK2824-.A...
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-Normally
open contact
No
• magnetic switch monitoring Normally closed contact-Normally
closed contact
No
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring No
• monitored start-up No
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
70 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.5.8
Connection examples 3TK2824-.A.20
Figure 3-21 Protective door monitoring autostart (2-channel)
Figure 3-22 EMERGENCY STOP (2-channel) with additional ON button
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 71
Figure 3-23 EMERGENCY STOP (1-channel) with additional ON button
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
72 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.6
3TK2825 safety relay
3.6.6.1
Applications
Applications of the 3TK2825 safety relay
You can use the 3TK2825 safety relay in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, e.g. for
movable guards and protective doors.
Depending on the external circuitry, a maximum performance level PLe/Cat. 4 in accordance
with DIN EN ISO 13849-1 or SILCL 3 in accordance with DIN EN/IEC 62061 can be
achieved with this device.
3.6.6.2
Description of function and connection information
The 3TK2825 safety relays have three instantaneous redundant enabling circuits with NO
functions and two instantaneous one-channel signaling circuits. The enabling circuits are
used for safety-related shutdown of actuators; the signaling contacts are used for a non-
safety-related signaling function.
Diagnostics is performed using three LEDs.
The 3TK2825 is suitable for monitoring actuator and sensor circuits according to
DIN EN / IEC 60204-1 in "Autostart" or "Monitored start" mode.
When the EMERGENCY STOP buttons are released or position switches operated and the
ON button is pressed, the redundant safety relays, the electronics, and the external
contactors are monitored to ensure that they are functioning correctly.
If monitoring results in a fault-free state, it is possible to start the device using the ON button
(in "monitored start" mode). This closes the enabling circuits. In autostart mode, starting and
therefore closing the enabling circuits is initiated directly after closure of the sensor contacts
on detection of the fault-free state.
With 3TK2825, the ON circuit Y33/34 is checked for short-circuit. That means it is identified
as a fault if Y33/34 is closed before the EMERGENCY STOP button is reset.
The device also monitors the sensor circuits for cross-circuits. This is done based on various
potentials in the sensor circuits.
3.6.6.3
Commissioning
After the supply voltage is applied to terminals A1 and A2, the 3TK2825 safety relay is ready
for operation. The internal parts of the circuit are constantly monitored for faults during
operation.
If any sensor is operated, or a fault is detected, the safety relay disconnects without delay.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 73
3.6.6.4
Structure 3TK2825
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.6.6.5
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y10; Y11
Channel 1, (1-channel)
Y11; Y12
Channel 1, (2-channel)
Y21; Y22
Channel 2, (2-channel)
Y33; Y34
On button, feedback circuit
Y43; Y44
Switchover between automatic start and monitored start
13 - 14
Enabling circuits, (NO)
23 - 24
33 - 34
41 - 42
Enabling circuits, (NC contacts)
51 - 52
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
74 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.6.6
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● CHANNEL 1
● CHANNEL 2
Operating states of 3TK2825
= off
= on
LED
Operation
POWER CHANNEL 1 CHANNEL 2 Line supply EMERGENCY
STOP
ON Enabling circuit
On Not pressed Pressed Closed
Pressed
Not pressed
Open
Not pressed
Not pressed
Open
Fault
• Relay welded
• Motor contactor welded
• Fault in electronics
• Short-circuit in ON circuit
Open
Cross-circuit in EMERGENCY STOP circuit
(minimum fault current IKmin = 0.5 A; PTC fuse
responds)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 75
3.6.6.7
State diagrams 3TK2825
Figure 3-24 State diagram 3TK2825
Figure 3-25 State diagram 3TK2825
*) = monitored start
**) = autostart
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
76 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.6.8
Technical data 3TK2825
3TK2825-.A...
3TK2825-.B...
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.0000000015
T1 value
for proof test interval or service life
according to
IEC 61508
a 20
Number of outputs
as contact-affected switching element
as
NO contact safety-related
• as NC contact for reporting function instantaneous
switching
2
• as NO contact safety-related instantaneous switching 3
• as NO contact safety-related delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 77
3TK2825-.A...
3TK2825-.B...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 6
– at DC-13 at 24 V A 6
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 6
– at 230 V
A
6
Thermal current
of the contact-affected switching element
maximum
A 6
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time typical
10 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs
required
gL/gG: 6 A, or quick: 10 A
Type of voltage of the controlled supply voltage
AC
DC
Control supply voltage frequency
• 1 rated value Hz 50 —
• 2 rated value Hz 60 —
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of
the magnet coil
• at 50 Hz
– for AC
0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
0.85
1.1
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
78 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2825-.A...
3TK2825-.B...
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
No
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring Yes
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Utilization category
DIN EN / IEC 60947-5-1
Rated operational voltage
Ue [V]
Rated operational current Ie [A]
if all enabling circuits are loaded
60 °C 70 °C
AC-15
230
6
4
DC-13
24
6
4
115
0.2
0.2
230
0.1
0.1
Continuous current I
th
6
4
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 79
3.6.6.9
Connection examples 3TK2825
Figure 3-26 Monitored start (1-channel)
Figure 3-27 Monitored start (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
80 Manual, 07/2016, NEB926157502000/RS-AB/003
Figure 3-28 Autostart (1-channel)
Figure 3-29 Autostart (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 81
Figure 3-30 Grounding
Note
It is not necessary to connect the PE terminal for the device to function. For this reason, we
recommend that you do not wire this terminal.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
82 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.7
3TK2827 / 3TK2828 safety relays
3.6.7.1
Applications
Applications of the 3TK2827/28 safety relay
You can use 3TK2827/28 safety relays in:
● EMERGENCY STOP devices acc. to DIN EN / IEC 60947-5-5
● Safety circuits acc. to DIN EN / IEC 60204-1, e.g. for monitoring safety guards
● Circuits in which controlled shutdown, STOP category 1 is necessary.
Depending on the external circuitry, you can achieve maximum performance level
PLe/Cat. 4/SIL 3 for instantaneous enabling circuits and maximum performance level
PLd/Cat. 3/SILCL 2 acc. to DIN EN ISO 13849-1/IEC 62061 for time-delayed enabling
circuits with this device.
3.6.7.2
Description of function and connection information
The 3TK2827/28 safety relays have two time-delayed and two instantaneous enabling
circuits as NO circuits and one instantaneous signaling circuit as an NC circuit. The
operating state and functioning are indicated by five LEDs.
When the EMERGENCY STOP buttons or the limit switch are released, when the ON circuit
Y33, Y34 is closed, the redundant safety relay, the electronics, and the controlled motor
contactors are checked for correct functioning.
With the 3TK2827 (monitored start), the ON circuit Y33, Y34 is checked for a short-circuit,
that is, it is identified as a fault if Y33, Y34 is closed before the EMERGENCY STOP button
is closed.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 83
OFF-delay times
The table below provides an overview of the OFF-delay times tv
Table 3- 3 3TK2827
Rated control supply voltage
US [V]
Start type
OFF delay tV
[s]
Article No. Screw-type
Article No.
Spring-loaded
24 V DC
Monitored
0,05 ... 3
3TK2827-1BB41
3TK2827-2BB41
24 V AC Monitored 0,05 ... 3 3TK2827-1AB21 3TK2827-2AB21
115 V AC
Monitored
0,05 ... 3
3TK2827-1AJ21
3TK2827-2AJ21
230 V AC Monitored 0,05 ... 3 3TK2827-1AL21 3TK2827-2AL21
24 V DC
Monitored
0,05 ... 30
3TK2827-1BB40
3TK2827-2BB40
24 V AC
Monitored
0,05 ... 30
3TK2827-1AB20
3TK2827-2AB20
115 V AC
Monitored
0,05 ... 30
3TK2827-1AJ20
3TK2827-2AJ20
230 V AC
Monitored
0,05 ... 30
3TK2827-1AL20
3TK2827-2AL20
Table 3- 4 3TK2828
Rated control supply voltage
US [V]
Start type
OFF delay tV
[s]
Article No. Screw-type
Article No.
Spring-loaded
24 V DC
Auto
0,05 ... 3
3TK2828-1BB41
3TK2828-2BB41
24 V AC
Auto
0,05 ... 3
3TK2828-1AB21
3TK2828-2AB21
115 V AC
Auto
0,05 ... 3
3TK2828-1AJ21
3TK2828-2AJ21
230 V AC
Auto
0,05 ... 3
3TK2828-1AL21
3TK2828-2AL21
24 V DC
Auto
0,05 ... 30
3TK2828-1BB40
3TK2828-2BB40
24 V AC
Auto
0,05 ... 30
3TK2828-1AB20
3TK2828-2AB20
115 V AC
Auto
0,05 ... 30
3TK2828-1AJ20
3TK2828-2AJ20
230 V AC
Auto
0,05 ... 30
3TK2828-1AL20
3TK2828-2AL20
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
84 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.7.3
Structure 3TK2827/28
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③
Time setting
④ Labels
3.6.7.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y10; Y11
Channel 1, (1-channel)
Y11; Y12
Channel 1, (2-channel)
Y21; Y22
Channel 2, (2-channel)
Y33; Y34
On button, feedback circuit
13 - 14
Enabling circuits, (NO)
23 - 24
31 - 32
Enabling circuit, (NC)
47 - 48
Enabling circuits (NO), time-delayed
57 - 58
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 85
3.6.7.5
Display of the operating state
The operating state and functioning of the device are indicated by five LEDs:
● POWER
● CHANNEL 1
● CHANNEL 2
● CH 1 (t)
● CH 2 (t)
Operating states of 3TK2827/28
= off
= on
LED
Operation
POWER Ch 1 Ch 2 Ch 1 (t) Ch 2 (t) Line
supply
EMERGENCY
STOP
ON Enabling circuit
On Not pressed Pressed Closed
Pressed, delay
time running
Not pressed FK1 & FK2 open,
FK1 (t) & FK2 (t)
closed
Pressed
Not pressed
Open
Not pressed
Not pressed
Open
Fault
• Relay welded
• Motor contactor welded
• Fault in electronics
• Short-circuit in ON circuit
Open
Cross-circuit in EMERGENCY STOP circuit (minimum fault
current IKmin = 0.5 A;
PTC fuse responds) or supply voltage missing
Ch1 = Channel 1
Ch2 = Channel 2
FK1 = enabling circuit 1, instantaneous
FK2 = enabling circuit 2, instantaneous
FK1 (t) = enabling circuit 1, time-delayed
FK2 (t) = enabling circuit 2, time-delayed
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
86 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.7.6
State diagrams 3TK2827 / 3TK2828
Figure 3-31 State diagram 3TK2827 (monitored start)
Figure 3-32 State diagram 3TK2828 (Autostart)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 87
3.6.7.7
Technical data 3TK2827 / 3TK2828
Technical data 3TK2827
3TK2827-.A...
3TK2827-.B...
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according
to IEC 61508
SIL2
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 d
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.0000000027
T1 value
for proof test interval or service life
according to
IEC 61508
a 20
Number of outputs
as contact-affected switching element
as
NO contact safety-related
• as NC contact for reporting function instantaneous switching 1
• as NO contact safety-related instantaneous switching 2
• as NO contact safety-related delayed switching 2
Stop category according to DIN EN 60204-1
0 + 1
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
88 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2827-.A...
3TK2827-.B...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 5
– at DC-13 at 24 V A 5
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 5
– at 230 V
A
5
Thermal current
of the contact-affected switching element
maximum
A 5
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time typical
10 000 000
Design of the fuse link
for short-circuit protection of the NO
contacts of the relay outputs
required
gL/gG: 6 A, or quick: 10 A
Type of voltage of the controlled supply voltage
AC
DC
Control supply voltage frequency 1 rated value
Hz
50
—
Control supply voltage frequency 2 rated value
Hz
60
—
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of
the magnet coil
• at 50 Hz
– for AC
0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
0.85
1.1
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 89
3TK2827-.A...
3TK2827-.B...
Product function
• automatic start No
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-Normally
open contact
No
• magnetic switch monitoring Normally closed contact-Normally
closed contact
No
• emergency stop function Yes
• protective door monitoring No
• standstill monitoring No
• step mat monitoring Yes
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
90 Manual, 07/2016, NEB926157502000/RS-AB/003
Technical data 3TK2828
3TK2828-.A...
3TK2828-.B...
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature
transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
SIL2
Performance level (PL) according to ISO 13849-1
e
Performance Level (PL)
for delayed release circuit
according
to ISO 13849-1
d
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.0000000027
T1 value
for proof test interval or service life
according to
IEC 61508
a 20
Number of outputs
as contact-affected switching element
as
NO contact
safety-related
• as NC contact for reporting function instantaneous
switching
1
• as NO contact safety-related instantaneous switching 2
• as NO contact safety-related delayed switching 2
Stop category according to DIN EN 60204-1
0 + 1
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 91
3TK2828-.A...
3TK2828-.B...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 5
– at DC-13 at 24 V A 5
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 5
– at 230 V
A
5
Thermal current
of the contact-affected switching element
maximum
A 5
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time typical
10 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs
required
gL/gG: 6 A, or quick: 10 A
Type of voltage of the controlled supply voltage
AC
DC
Control supply voltage frequency 1 rated value
Hz
50
—
Control supply voltage frequency 2 rated value
Hz
60
—
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of
the magnet coil
• at 50 Hz
– for AC
0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
0.85
1.1
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
92 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2828-.A...
3TK2828-.B...
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
No
• emergency stop function No
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring Yes
• monitored start-up No
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring No
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Utilization category
DIN EN / IEC 60947-5-1
Rated operational voltage
Ue [V]
Rated operational current Ie [A]
if all instantaneous / time-delayed enabling
circuits are loaded
60 °C 70 °C
AC-15
230
5 / 3
4 / 3
DC-13
24
5 / 2
4 / 3
115
0.2 / 0.2
0.2 / 0.2
230
0.1/ 0,1
0.1/ 0.1
Continuous current I
th
5 / 5
4 / 4
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 93
3.6.7.8
Connection examples 3TK2827 / 3TK2828
Figure 3-33 Monitored start (1-channel)
Figure 3-34 Monitored start (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
94 Manual, 07/2016, NEB926157502000/RS-AB/003
Figure 3-35 Autostart (1-channel)
Figure 3-36 Autostart (2-channel)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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Figure 3-37 Grounding
Note
It is not necessary to connect the PE terminal for the device to function. For this reason, we
recommend that you do not wire this terminal.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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3.6.8
3TK2830 expansion unit
3.6.8.1
Applications
Applications of 3TK2830 expansion unit
The 3TK2830 is used to expand the enabling circuits. You can use it together with all 3TK28
basic units. The maximum achievable performance level PL / Cat. in accordance with
DIN EN ISO 13849-1, or SILCL in accordance with IEC 62061 is equivalent to the
performance level PL / Cat. / SIL of the basic unit if the external circuitry (cable connection
between basic unit and expansion unit) is failsafe.
3.6.8.2
Description of function and connection information
The 3TK2830 has four safe enabling circuits as NO circuits and one positive-action NC
circuit. Two LEDs indicate the operating state.
The 3TK2830 is controlled via any enabling circuit of the basic unit. The NC circuit 51/52 of
the 3TK2830 is looped into the feedback circuit of the basic unit.
The 3TK2830 expansion unit is checked for correct functioning by means of the feedback
circuit of the connected basic unit.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 97
3.6.8.3
Structure 3TK2830
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.6.8.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
13 - 14
Enabling circuit 1, (NO)
23 - 24
Enabling circuit 2, (NO)
33 - 34
Enabling circuit 3, (NO)
43 - 44
Enabling circuit 4, (NO)
51 - 52
Monitoring of the 3TK2830 (NC)
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
98 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.8.5
Display of the operating state
The operating state and functioning of the device are indicated by two LEDs:
● CHANNEL 1
● CHANNEL 2
Operating states of 3TK2830
= off
= on
LED
Operation
Channel 2
Channel 2
Line supply
Enabling circuit
On Closed
Open
Fault
• Relay jammed
• Motor contactor jammed
• Fault in electronics
• Supply voltage missing
3.6.8.6
State diagrams 3TK2830
Figure 3-38 State diagrams 3TK2830
.CB30
.A.20
1)
50 ms
100 ms
2)
25 ms
80 ms
3)
30 ms
200 ms
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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3.6.8.7
Technical data 3TK2830
3TK2830-.A...
3TK2830-.C...
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after IEC 204-2 according
to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
—
Design of the cascading
none
Type of the safety-related wiring of the inputs
—
Product feature transverse contact-secure
No
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according
to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 corresponds to basic unit
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.0000000012
T1 value
for proof test interval or service life
according to
IEC 61508
s 630 720 000
Number of outputs
as contact-affected switching element
as NO
contact safety-related
• as NC contact for reporting function instantaneous switching 0
• as NO contact safety-related instantaneous switching 4
• as NO contact safety-related delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input No
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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3TK2830-.A...
3TK2830-.C...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 5
– at DC-13 at 24 V A 5
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 5
– at 230 V
A
5
Thermal current
of the contact-affected switching element
maximum
A 5
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time typical
10 000 000
Design of the fuse link
for short-circuit protection of the NO
contacts of the relay outputs
required
gL/gG: 6 A, or quick: 10 A
Type of voltage of the controlled supply voltage
AC
AC/DC
Control supply voltage frequency 1 rated value
Hz
50
Control supply voltage frequency 2 rated value
Hz
60
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of the
magnet coil
• at 50 Hz
– for AC
0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
—
0.85
—
1.2
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 101
3TK2830-.A...
3TK2830-.C...
Product function
• automatic start No
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-Normally
open contact
No
• magnetic switch monitoring Normally closed contact-Normally
closed contact
No
• emergency stop function No
• protective door monitoring No
• standstill monitoring No
• step mat monitoring No
• monitored start-up No
Acceptability for application
• safety-related circuits No
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring No
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring No
• tactile sensor monitoring No
• valve monitoring No
Utilization category
acc. to DIN EN / IEC 60947-5-1
Rated operational voltage
Ue [V]
Rated operational current Ie [A]
if all enabling circuits are loaded
40 °C 50 °C 60 °C 70 °C
AC-15
230
5
4
3.5
3
DC-13
24
5
4
3.5
3
115
0.2
0.2
0.2
0.2
230
0.1
0.1
0.1
0.1
Continuous current I
th
5
4
3.5
3
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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3.6.8.8
Connection examples 3TK2830
Figure 3-39 EMERGENCY STOP
Figure 3-40 EMERGENCY STOP with time delay
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 103
3.6.9
3TK2834 two-hand control device
3.6.9.1
Applications
Applications of the 3TK2834 two-hand control device
The 3TK2834 two-hand control device is suitable for installation in controllers for the
following presses:
● Hydraulic presses DIN EN 693,
● Eccentric presses and similar presses DIN EN 692,
● Screw presses DIN EN 692,
A maximum performance level PLe/Cat. 4 in accordance with DIN EN ISO 13849-1/SILCL 3
in accordance with IEC 62061 or Category III C acc. to DIN EN 574 can be achieved with
this device.
3.6.9.2
Description of function and connection information
The 3TK2834 two-hand control device has two enabling circuits as NO circuits and two
signaling circuits as NC circuits. The operating state and functioning are indicated by five
LEDs.
Pressing buttons S1 and S2 simultaneously (< 0.5 s) closes the enabling circuits. Releasing
one button, opens the enabling circuits. They will only close again when both buttons are
released and pressed again.
1. Apply operating voltage to terminals A1 and A2. The operating voltage must be
disconnected at the same time as the driving energy of the press.
2. Closing the feedback circuit: Connect a jumper to Y11, Y12 or NC contacts of external
contactors.
3. Connecting the input circuit:
Connect button S1 to terminals Y21, Y22, Y23 and
button S2 to terminals Y31, Y32, Y33
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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3.6.9.3
Structure 3TK2834
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.6.9.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
13; 14
Enabling circuit 1, (NO)
23; 24
Enabling circuit 2, (NO)
31; 32
Signaling circuit 1, (NC)
41; 42
Signaling circuit 2, (NC)
Y11, Y12
Feedback circuit
Y21; Y22; Y23
Button S1
Y31; Y32; Y33
Button S2
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 105
3.6.9.5
Display of the operating state
The operating state and functioning of the device are indicated by five LEDs:
● POWER
● S 1 ON
● S 2 ON
● CHANNEL 1
● CHANNEL 2
Operating states of 3TK2834
= off
= on
LED
Operation
POWER
S 1 ON
S 2 ON
Channel 1
Channel 2
Button
Not pressed
Only S1 pressed
Only S2 pressed
S1 and S2 pressed
The device cannot start with the following faults:
● Short-circuit, e.g. between the buttons
● Defective relay coils
● Wire break
● Jammed contacts
The output relays do not pick up if
● simultaneity (< 0.5 s) is not achieved
● only one button is pressed
● feedback circuit Y11, Y12 is open.
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
106 Manual, 07/2016, NEB926157502000/RS-AB/003
3.6.9.6
Technical data 3TK2834
3TK2834-.A...
3TK2834-.B...
EMC emitted interference
EN 60947-5-1
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
—
Design of the cascading
none
Type of the safety-related wiring of the inputs
two-channel
Product feature transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type A
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.0000000014
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Number of outputs
as contact-affected switching element
as NO contact safety-related
• as NC contact for reporting function instantaneous
switching
0
• as NO contact safety-related instantaneous switching 4
• as NO contact safety-related delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input No
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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3TK2834-.A...
3TK2834-.B...
Design of the electrical connection jumper socket
Yes
Breaking capacity current at AC-15 at 24 V
A
—
Switching capacity current
of the NO contacts of the relay
outputs
• at AC-15 at 230 V A 5
• at DC-13
– at 24 V A 6
– at 115 V A 0.2
– at 230 V A 0.1
Switching capacity current
of the NC contacts of the relay
outputs
• at AC-15
– at 115 V A 5
– at 230 V A 5
• at DC-13
– at 115 V A 0.2
– at 230 V A 0.1
Thermal current
of the contact-affected switching element
maximum
A 6
Electrical operating cycles as operating time typical
100 000
Mechanical operating cycles as operating time
typical
10 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs
required
gL/gG: 6 A, or quick: 10 A
Type of voltage of the controlled supply voltage
AC
DC
Control supply voltage frequency 1 rated value
Hz
50
—
Control supply voltage frequency
2
rated value
Hz 60 —
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of the magnet coil
• at 50 Hz
– for AC
0.85
1.1
• at 60 Hz
– for AC
0.85
1.1
• for DC
0.85
1.1
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
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3TK2834-.A...
3TK2834-.B...
Product function
• automatic start No
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
No
• emergency stop function No
• protective door monitoring No
• standstill monitoring No
• step mat monitoring No
• monitored start-up No
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring No
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Utilization category
acc. to VDE 0660 Part 200,
DIN EN / IEC 60947-5-1
Rated operational voltage
Ue [V]
Rated operational current Ie [A]
if all instantaneous / time-delayed enabling
circuits are loaded
60 °C 70 °C
AC-15
230
6
4
DC-13
24
6
4
115
0.2
0.2
230
0.1
0.1
Continuous current I
th
6
4
Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 109
3.6.9.7
Connection example
Figure 3-41 Two-hand
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
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3.7
3TK28 safety relays with solid-state enabling circuits
3.7.1
3TK2840 safety relay
3.7.1.1
Applications
Applications of the 3TK2840 safety relay
You can use the 3TK2840 safety relay in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, e.g. for
movable guards and protective doors. Depending on the external circuitry, a maximum
performance level PLd / Cat. 3 in accordance with DIN EN ISO 13849-1 or SILCL 2 in
accordance with IEC 62061 can be achieved.
3.7.1.2
Description of function and connection information
The 3TK2840 safety relay has two solid-state outputs. The operating state and functioning
are indicated by three LEDs.
All internal parts of the circuit are cyclically monitored for faults during operation.
Connect the EMERGENCY STOP button or the position switch to terminals Y11, Y12, and
Y21, Y22. The ON button is connected in series with the NC contacts of the external
actuators (feedback circuit) at terminals Y33, Y34.
The 3TK2840 safety relay and the controlled contractors Q1 and Q2 require the same
ground potential.
Performance level PLd in accordance with DIN EN ISO 13849-1 or SILCL 2 in accordance
with IEC 62061 is only achieved in conjunction with 2 external actuators with positive-action
feedback contacts.
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 111
3.7.1.3
Structure 3TK2840
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.7.1.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y11; Y12
Channel 1, EMERGENCY STOP or position switch
Y21; Y22
Channel 2, EMERGENCY STOP or position switch
Y20
Parameterization "single-channel sensor connection"
Y33; Y34
ON button, feedback circuit
14; 24
Solid-state outputs
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
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3.7.1.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● RUN
● FAULT
Operating states of 3TK2840
= off
= on
LED
Operation
POWER RUN FAULT Line supply EMERGENCY
STOP
ON Outputs
On Not pressed Pressed On
Pressed
Not pressed
Off
Not pressed
Not pressed
Off
Fault
• Fault in electronics
• Cross-circuit in EMERGENCY STOP circuits
Off
Supply voltage missing
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 113
3.7.1.6
State diagrams 3TK2840
Figure 3-42 State diagram 3TK2840 autostart
Figure 3-43 State diagram 3TK2840 monitored start
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
114 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.1.7
Technical data 3TK2840
3TK2840-1B...
3TK2840-2B...
EMC emitted interference
EN 60947-5-1, EN 61000-6-2, EN 61000-6-4
Item designation
• according to DIN 40719 extendable after
IEC 204-2 according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL2
SIL claim limit (for a subsystem)
according to
EN 62061
2
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 d
• for delayed release circuit according to ISO
13849-1
—
Category
• according to EN 954-1 3
• according to ISO 13849-1 3
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with high demand rate according to EN 62061
1/h 0.000000011
T1 value
for proof test interval or service life
according to IEC 61508
a 20
Number of outputs
as contact-less semiconductor
switching element
• for reporting function
– non-delayed 0
– delayed switching 0
• safety-related
– non-delayed 2
– delayed switching 0
Stop category according to DIN EN 60204-1
0
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 115
3TK2840-1B...
3TK2840-2B...
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Design of the electrical connection jumper socket
Yes
Switching capacity current
of semiconductor outputs
for enabling circuit
for DC-13
at 24 V
A 0.5
Type of voltage of the controlled supply voltage
DC
Control supply voltage 1 for DC final rated value
• for DC rated value V 24
Operating range factor control supply voltage rated
value
of the magnet coil
for DC
0.9
1.15
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed
contact-Normally open contact
No
• magnetic switch monitoring Normally closed
contact-Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring No
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring Yes
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring Yes
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
116 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.1.8
Connection examples 3TK2840
Figure 3-44 Autostart (2-channel)
Figure 3-45 Monitored start (2-channel)
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 117
Figure 3-46 Autostart (1-channel)
Figure 3-47 Monitored start (1-channel)
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
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3.7.2
3TK2841 safety relay
3.7.2.1
Applications
Applications of the 3TK2841 safety relay
You can use the 3TK2841 safety relay in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, e.g. with
movable guards and protective doors or with contactless protective equipment according to
DIN EN / IEC 61496-1, electrical equipment of furnaces according to VDE 0116 and
automatic gas burner control systems for gas burners according to DIN EN 298. Depending
on the external circuitry, a max. performance level PLe / Cat. 4 per DIN EN ISO 13849-1 or
SIL 3 per DIN EN / IEC 62061 can be achieved with this device.
The device can monitor safety shutdown mats with evaluation according to the cross-circuit
principle (see Figure 3-54 Safety shutdown mat (Page 126))
3.7.2.2
Description of function and connection information
The solid-state 3TK2841 safety relay has two safe solid-state outputs. The operating state
and functioning are indicated by three LEDs. On startup, the device runs a self-test in which
the internal electronics are checked for correct functioning. All internal parts of the circuit are
cyclically monitored for faults during operation.
Connect the EMERGENCY STOP button or the position switches or light array to terminals
Y11, Y12, and Y21, Y22. Connect the ON button in series with the NC contacts of the
external actuators to the supply voltage L+ (24 V DC) and to terminal Y34. The cascade
input 1 must either be routed via a safe output or directly to supply voltage L+ (24 V DC).
External actuators or loads can be connected to safe outputs 14, 24. Make sure that the
actuators or loads and the 3TK2841 solid-state safety relay have the same ground potential.
Parallel connection of outputs 14 and 24 to increase the load current is not permissible.
If solid-state sensors are used (light array monitoring, etc.) and in single-channel operation,
Y35 must be connected to L+ (24 V DC). For autostart operation, Y32 must be routed
directly and Y34 via NC contacts of the external actuators to L+ (24 V DC).
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 119
3.7.2.3
Structure 3TK2841
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③ Labels
3.7.2.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y11; Y12
Channel 1, EMERGENCY STOP or position switch
Y21; Y22
Channel 2, EMERGENCY STOP or position switch
Y35
with / without cross-circuit detection
Y32
Parameterization "single-channel sensor connection"
Y34
ON button, feedback circuit
1
Cascade input
14; 24
Safe solid-state outputs
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
120 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.2.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● RUN
● FAULT
Operating states of 3TK2841
= off
= on
= flashing
LED
Operation
POWER RUN FAULT Line supply EMERGENCY
STOP
ON Outputs
On Not pressed Pressed On
Pressed
1)
Not pressed
Off
Not pressed
Not pressed
Off
Self-test on startup approx. 7 s
Fault
• Fault in electronics
• Change of pin assignment during operation
• Short-circuit to 24 V2)
Off
Supply voltage missing
1) Sensor circuits open; cross-circuit between sensors; short-circuit of sensors to ground.
2) Only on circuit variant with "cross-circuit detection"
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 121
3.7.2.6
State diagrams 3TK2841
Figure 3-48 State diagram 3TK2841 autostart
Figure 3-49 State diagram 3TK2841 monitored start
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
122 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.2.7
Technical data 3TK2841
3TK2841-1B...
3TK2841-2B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
cascading or in-service switching
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature
transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.00000000005
T1 value
for proof test interval or service life
according to
IEC 61508
a 20
Number of outputs
as contact-less semiconductor switching
element
• for reporting function
– non-delayed 0
– delayed switching 0
• safety-related
– non-delayed 2
– delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching Yes
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 123
3TK2841-1B...
3TK2841-2B...
Design of the electrical connection jumper socket
Yes
Switching capacity current
of semiconductor outputs
for
enabling circuit
for DC-13
at 24 V
A 1.5
Type of voltage of the controlled supply voltage
DC
Control supply voltage 1 for DC final rated value
• for DC rated value V 24
Operating range factor control supply voltage rated value
of
the magnet coil
for DC
0.9
1.15
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring Yes
• light grid monitoring Yes
• light barrier monitoring Yes
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring Yes
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring Yes
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring Yes
• position switch monitoring Yes
• tactile sensor monitoring Yes
• valve monitoring No
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
124 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.2.8
Connection examples 3TK2841
Figure 3-50 Autostart (2-channel)
Figure 3-51 Monitored start (2-channel)
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 125
Figure 3-52 Autostart (2-channel) without cross-circuit detection
Figure 3-53 Monitored start (1-channel)
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
126 Manual, 07/2016, NEB926157502000/RS-AB/003
Figure 3-54 Safety shutdown mat
Figure 3-55 Cascading
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 127
3.7.3
3TK2842 safety relay
3.7.3.1
Applications
Applications of the 3TK2842 safety relay
You can use the 3TK2842 safety relay in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, e.g. with
movable guards and protective doors or with contactless protective equipment according to
DIN EN / IEC 61496-1, electrical equipment of furnaces according to DIN EN 50156-1 and
automatic gas burner control systems for gas burners according to DIN EN 298.
Depending on the external circuitry, a max. performance level PLe / Cat. 4 per
DIN EN ISO 13849-1 or SIL 3 per DIN EN / IEC 62061 can be achieved with this device.
The device can monitor safety shutdown mats with evaluation according to the cross-circuit
principle (see Figure 3-62 Safety shutdown mat, autostart (2-channel) (Page 135))
3.7.3.2
Description of function and connection information
The solid-state 3TK2842 safety relay has a safe solid-state output and a time-delayed safe
solid-state output.
The operating state and functioning are indicated by three LEDs.
On startup, the device runs a self-test in which the internal electronics are checked for
correct functioning. All internal parts of the circuit are cyclically monitored for faults during
operation.
Connect the EMERGENCY STOP button or the position switches or light array to terminals
Y11, Y12, and Y21, Y22. Connect the ON button in series with the NC contacts of the
external actuators to the supply voltage L+ (24 V DC) and to terminal Y34. The cascade
input 1 must either be routed via a safe output or directly to supply voltage L+ (24 V DC).
External actuators or loads can be connected to safe outputs 14, 28. Make sure that the
actuators or loads and the 3TK2842 solid-state safety relay have the same ground potential.
If solid-state sensors are used (light array monitoring, etc.) and in single-channel operation,
Y35 must be connected to L+ (24 V DC). For autostart operation, Y32 must be routed
directly and Y34 via NC contacts of the external actuators to L+ (24 V DC).
Correct functioning of the sensor circuits is checked by means of a clocked signal.
OFF-delay times
The table below provides an overview of the OFF-delay times tv
Table 3- 5 3TK2842
Rated control supply voltage
US
[V]
Start type
OFF delay tV [s]
Article No. Screw-type
Article No.
Spring-type
24 V DC Auto/
monitored
0,05 ... 3
3TK2842-1BB41
3TK2842-2BB41
0,05 ... 30 3TK2842-1BB42 3TK2842-2BB42
5 ... 300
3TK2842-1BB44
3TK2842-2BB44
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
128 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.3.3
Structure 3TK2842
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③
Time setting
④ Labels
3.7.3.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y11; Y12
Channel 1, EMERGENCY STOP or position switch
Y21; Y22
Channel 2, EMERGENCY STOP or position switch
Y35
with / without cross-circuit detection
Y32
Parameterization "single-channel sensor connection"
Y34
ON button, feedback circuit
1
Cascade input
14
Safe solid-state output
28
Safe solid-state output, delayed
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 129
3.7.3.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● RUN
● FAULT
Operating states of 3TK2842
= off
= on
= flashing
LED
Operation
POWER RUN FAULT Line supply EMERGENCY
STOP
ON Outputs
On Not pressed Pressed On
Pressed
1)
Not pressed
Off
Not pressed
Not pressed
Off
3)
Pressed
Not pressed
On / Off
Self-test on startup approx. 7 s
Fault
• Fault in electronics
• Change of pin assignment during operation
• Short-circuit to 24 V2)
Off
Supply voltage missing
1) Sensor circuits open; cross-circuit between sensors; short-circuit of sensors to ground.
2) Only on circuit variant with "cross-circuit detection"
3) Delay time running
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
130 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.3.6
State diagrams 3TK2842
Figure 3-56 State diagram 3TK2842 autostart
Figure 3-57 State diagram 3TK2842 monitored start
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 131
3.7.3.7
Technical data 3TK2842
3TK2842-1B...
3TK2842-2B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
cascading or in-service switching
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature
transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem)
according to EN
62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
SIL3
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 e
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with
high demand rate according to EN 62061
1/h 0.00000000005
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Number of outputs
as contact-less semiconductor
switching element
• for reporting function
– non-delayed 0
– delayed switching 0
• safety-related
– non-delayed 1
– delayed switching 1
Stop category
according to DIN EN 60204-1
0 + 1
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
132 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2842-1B...
3TK2842-2B...
Design of the input
• cascading-input/functional switching Yes
• feedback input Yes
• start input Yes
Design of the electrical connection jumper socket
Yes
Switching capacity current
of semiconductor outputs
for
enabling circuit
for DC-13
at 24 V
A 1.5
Type of voltage of the controlled supply voltage
DC
Control supply voltage 1 for DC final rated value
• for DC rated value V 24
Operating range factor control supply voltage rated value
of the magnet coil
for DC
0.9
1.15
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring Yes
• light grid monitoring Yes
• light barrier monitoring Yes
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring Yes
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring Yes
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring Yes
• position switch monitoring Yes
• tactile sensor monitoring Yes
• valve monitoring No
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 133
3.7.3.8
Connection examples 3TK2842
①
Converter
Figure 3-58 Protective door monitoring, autostart (2-channel)
①
Converter
Figure 3-59 EMERGENCY STOP, monitored start (2-channel)
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
134 Manual, 07/2016, NEB926157502000/RS-AB/003
①
Converter
Figure 3-60 EMERGENCY STOP, monitored start (1-channel)
①
Frequency converter without safety function
Figure 3-61 Light array monitoring, (2-channel) without cross-circuit detection
Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 135
①
Converter
Figure 3-62 Safety shutdown mat, autostart (2-channel)
①
Converter
Figure 3-63 Cascading, EMERGENCY STOP + protective door monitoring, (2-channel)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
136 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8
3TK28 safety relays with contactor relay enabling circuits
3.8.1
3TK2805 / 3TK2806 safety relays
3.8.1.1
Applications
The 3TK2805 / 3TK2806 contactor safety combinations are used in EMERGENCY STOP
circuits and in circuits for monitoring protective equipment, such as safety guards.
3.8.1.2
Description of function and connection information
Internal control of the contactor safety combination is implemented according to
DIN EN / IEC 60204-1, paragraph 9.4.2.2 so that the function of the safety circuit is retained
in case of a fault in the contactor relay. The supply voltage must meet the requirements of
DIN EN / IEC 60204-1. (Terminal "A2" must be connected to the side of the control circuit
that is connected to the protective circuit.) On each ON and OFF cycle of the machine to be
switched, the contacts of the contactor relays are checked for correct opening and closure.
This is achieved, for example, by:
● Disconnecting and reconnecting the control voltage at the main switch
● Operating and releasing the EMERGENCY STOP device
● Opening and closing the safety guard.
Note
1-channel sensor connection
A 1
-channel control of the contactor safety combination can be implemented by
connecting terminal X6 directly to "A2" a
nd connecting the EMERGENCY STOP device
between terminal X1 and the connected terminals X3; X5.
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 137
3.8.1.3
Structure 3TK2805/06
Front view
No.
Meaning
①
Display LEDs
②
Terminal blocks
③ Labels
3.8.1.4
Terminal assignment
Terminal
Description
A1
L/+
A2 N/-
X1 ... X6
Control connections
13 - 14
23 - 24
33 - 34
43 - 44
53 - 54
Enabling circuits (NO)
65 - 66
Signaling circuits / feedback circuit
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
138 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.1.5
Display of the operating states
Operating states of 3TK2805/06
"POWER" indicates that the device is energized.
"CHANNEL 1" and "CHANNEL 2" light up if the ON button has been operated and the
contacts of the EMERGENCY STOP button or the position switch are closed.
3.8.1.6
State diagrams 3TK2805 / 3TK2806
Figure 3-64 Automatic start
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 139
3.8.1.7
Technical specifications 3TK2805/ 3TK2806
Ambient temperature
•
during storage
•
during operation
°C
-55 ... +80
-25 ... +55
HFT
1
Classification
Type A
Rated control supply voltage
24 V AC/DC; 110 V AC; 230 V AC
Rated insulation voltage
•
for control circuit
V Ui = 400
Ui = 250
Rated impulse withstand voltage
•
for control circuit
kV Uimp = 4
Uimp = 1.5
Short-circuit protection
Fuse-links LV HBC, NEOZED, and DIAZED
No-weld fuse protection at
•
for enabling circuit
•
and signaling circuit
IK ≥ 1 kA
Operational class gL(gG) 6 A / fast 10 A
Operational class gL(gG) 6 A / fast 6 A
Utilization category
acc. to VDE0660-200,
DIN EN / IEC 60947-5-1
Rated operational voltage
Ue [V]
Rated operational current Ie [A]
if all enabling circuits are loaded
50 °C
55 °C
AC-1 / AC-12
6
6
AC-15
24
4
4
230
4
3
400
3
3
DC-13
24
6
6
230
0,5
0,5
Rated power
AC-3 230 0.55 kW 0.55 kW
400
1.1 kW
1.1 kW
Continuous current Ith
Breaking capacity at
cosφ = 0.7 ... 1
ohmic
230 V AC
24 V DC
10
10
Σ max 30
8
8
Σ max 24
In case of fault, outputs 13/14, 23/24, 33/34, 43/44, and 53/54 switch off. Signaling contact
65/66 switches on.
You can obtain further technical data of the 3TK2805/06 safety relays on request from:
Technical Assistance (http://www.siemens.com/sirius/technical-assistance)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
140 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.1.8
Connection examples 3TK2805/ 3TK2806
Connection examples 3TK2805
Figure 3-65 Monitored start; EMERGENCY STOP (2-channel)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 141
Connection examples 3TK2806
Figure 3-66 Autostart; protective door (2-channel)
Figure 3-67 Autostart; protective door (1-channel)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
142 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.2
3TK2850 / 3TK2851 / 3TK2852 safety relay
3.8.2.1
Applications
Applications of the 3TK285 safety combination
You can use the 3TK285 safety combination in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, e.g. for
movable guards and protective doors. Depending on the external circuitry, a maximum
performance level PLd / Cat. 3 in accordance with DIN EN ISO 13849-1 or SILCL 2 in
accordance with IEC 62061 can be achieved with this device.
3.8.2.2
Description of function and connection information
The solid-state 3TK285 safety combination has two contactor relays The operating state and
functioning are indicated by three LEDs.
All internal parts of the circuit are cyclically monitored for faults during operation.
Connect the EMERGENCY STOP button or the position switch to terminals Y11, Y12, and
Y21, Y22.
The ON button is connected to Y34 and L+ (24 DC). Terminals Y33, Y34 are jumpered
during autostart operation. Y20 and Y21 are jumpered during 1-channel operation.
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 143
3.8.2.3
Structure 3TK285
Front view
No.
Meaning
①
Removable terminal block
②
Display LEDs
③
Terminal blocks
④ Labels
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
144 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.2.4
Terminal assignment
Terminal
Description
A1
L/+
A2 N/-
Y11; Y12
Channel 1, EMERGENCY STOP or position switch
Y21; Y22 Channel 2, EMERGENCY STOP or position switch
Y20
Parameterization "single-channel sensor connection"
Y33; Y34
ON button feedback circuit
13 - 14
Contact units (see contact units graphic)
1)
Auxiliary contact units
Figure 3-68 Contact units
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 145
3.8.2.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● RUN
● FAULT
Operating state of 3TK285
= off
= on
LED
Operation
POWER RUN FAULT EMERGENCY
STOP
ON Outputs Cause
Not pressed Pressed On Normal operation
Pressed No function Off EMERGENCY STOP
(protective door) pressed
Not pressed Not pressed Contactors opened;
press ON button to start
Fault
• Fault in electronics
• Change of pin assignment
during operation
• Short-circuit to 24 V
Off
EMERGENCY STOP
(protective door) not
pressed
⇒ device errors
No supply voltage
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
146 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.2.6
State diagrams 3TK2850 / 3TK2851 / 3TK2852
2) For contact units, see Chapter: Terminal assignment (Page 144)
Figure 3-69 State diagram 3TK2850 / 3TK2851 / 3TK2852 autostart
Figure 3-70 State diagram 3TK2850 / 3TK2851 / 3TK2852 monitored start
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 147
3.8.2.7
Technical data 3TK2850 / 3TK2851 / 3TK2852
Technical data 3TK2850
3TK2850-.A...
3TK2850-.B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL2
SIL claim limit (for a subsystem) according to EN 62061
2
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 d
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 3
• according to ISO 13849-1 3
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.000000012
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Number of outputs
as contact-affected switching element
as NO contact safety-related
• as NC contact for reporting function instantaneous
switching
0
• as NO contact safety-related instantaneous switching 3
• as NO contact safety-related delayed switching 0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
148 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2850-.A...
3TK2850-.B...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 6
– at DC-13 at 24 V A 10
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 6
– at 230 V
A
6
Thermal current
of the contact-affected switching element
maximum
A —
Electrical operating cycles as operating time typical
—
Mechanical operating cycles as operating time typical
30 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs
required
gL/gG: 10 A
Type of voltage of the controlled supply voltage
AC
DC
Control supply voltage frequency 1 rated value
Hz
50
—
Control supply voltage frequency 2 rated value
Hz
60
—
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of the magnet coil
• at 50 Hz
– for AC
0.9
—
1.15
—
• at 60 Hz
– for AC
0.9
—
1.15
—
• for DC
—
0.85
—
1.1
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
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3TK2850-.A...
3TK2850-.B...
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring No
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
150 Manual, 07/2016, NEB926157502000/RS-AB/003
Technical data 3TK2851
3TK2851-.A...
3TK2851-.B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature
transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL2
SIL claim limit (for a subsystem)
according to EN
62061
2
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 d
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 3
• according to ISO 13849-1 3
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with
high demand rate according to EN 62061
1/h 0.000000011
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Number of outputs
as contact-affected switching element
as NC contact
for reporting function
instantaneous
switching
1
Number of outputs
as contact-affected switching element
as NO contact safety-related instantaneous switching
2
Number of outputs
as contact-affected switching element
as NO contact safety-related delayed switching
0
Stop category according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 151
3TK2851-.A...
3TK2851-.B...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 6
– at DC-13 at 24 V A 10
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 6
– at 230 V
A
6
Thermal current
of the contact-affected switching element
maximum
A —
Electrical operating cycles as operating time typical
—
Mechanical operating cycles as operating time typical
30 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs
required
gL/gG: 10 A
Type of voltage of the controlled supply voltage
AC
DC
Control supply voltage frequency 1 rated value
Hz
50
—
Control supply voltage frequency 2 rated value
Hz
60
—
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of the magnet coil
• at 50 Hz
– for AC
0.9
—
1.15
—
• at 60 Hz
– for AC
0.9
—
1.15
—
• for DC
—
0.85
—
1.1
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
152 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2851-.A...
3TK2851-.B...
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring No
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 153
Technical data 3TK2852
3TK2852-.A...
3TK2852-.B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
none
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature
transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL2
SIL claim limit (for a subsystem) according to EN 62061
2
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 d
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 3
• according to ISO 13849-1 3
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with
high demand rate according to EN 62061
1/h 0.000000011
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Number of outputs
as contact-affected switching element
as NO contact safety-related
• as NC contact for reporting function instantaneous
switching
1
• as NO contact safety-related instantaneous switching 6
• as NO contact safety-related delayed switching 0
Stop category
according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching No
• feedback input Yes
• start input Yes
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
154 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2852-.A...
3TK2852-.B...
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 6
– at DC-13 at 24 V A 10
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 6
– at 230 V
A
6
Thermal current
of the contact-affected switching element
maximum
A —
Electrical operating cycles as operating time typical
—
Mechanical operating cycles as operating time typical
30 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs
required
gL/gG: 10 A
Type of voltage of the controlled supply voltage
AC
DC
Control supply voltage frequency 1 rated value
Hz
50
—
Control supply voltage frequency 2 rated value
Hz
60
—
Control supply voltage 1 for DC final rated value
• for DC rated value V — 24
Operating range factor control supply voltage rated value
of the magnet coil
• at 50 Hz
– for AC
0.9
—
1.15
—
• at 60 Hz
– for AC
0.9
—
1.15
—
• for DC
—
0.85
—
1.1
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 155
3TK2852-.A...
3TK2852-.B...
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring No
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
156 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.2.8
Connection examples 3TK2850 / 3TK2851 / 3TK2852
2) For contact units, see Chapter: Terminal assignment (Page 144)
Figure 3-71 Autostart (2-channel)
Figure 3-72 Autostart (1-channel)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 157
Figure 3-73 Monitored start (2-channel)
Figure 3-74 Monitored start (1-channel)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
158 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.3
3TK2853 safety relay
3.8.3.1
Applications
Applications of the 3TK2853 safety combination
You can use the 3TK2853 safety combination in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, e.g. for
movable guards and protective doors and contactless protective equipment. Depending on
the external circuitry, a maximum performance level PLe / Cat. 4 in accordance with
DIN EN ISO 13849-1 or SILCL 3 in accordance with IEC 62061 can be achieved.
3.8.3.2
Description of function and connection information
The 3TK2853 solid-state safety combination has two contactor relays as switching elements,
one safe solid-state output, one safe input for cascading and one input for functional
switching.
The operating state and functioning are indicated by three LEDs.
On startup, the device runs a self-test in which the internal electronics are checked for
correct functioning.
All internal parts of the circuit are cyclically monitored for faults during operation.
With safe output 2, expansion units, such as 3TK2830/56/57 and external actuators or loads,
can be switched. Also, cascading with units 3TK2841/42/45/53 is possible via safe output 2.
In the case of PLd/e or SILCL 2/3, single-channel cascading is only possible within one
cabinet.
Make sure that the actuator/load and the 3TK2853 safety combination have the same
ground potential.
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 159
3.8.3.3
Structure 3TK2853
Front view
No.
Meaning
①
Removable terminal block
②
Display LEDs
③
Terminal blocks
④ Labels
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
160 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.3.4
Terminal assignment
Terminal
Description
A1
L/+
A2 N/-
Y11; Y12
Channel 1, EMERGENCY STOP or position switch
Y21; Y22 Channel 2, EMERGENCY STOP or position switch
Y35
with / without cross-circuit detection
Y32
Parameterization "single-channel sensor connection"
Y33; Y34
ON button, feedback circuit
1
Cascade input
2
Safe solid-state output (24V DC / 1A)
3
Power supply for external switches
4
Input for functional switching
13, 14
Contact units
1)
Auxiliary contact units
Figure 3-75 Contact units
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 161
3.8.3.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● RUN
● FAULT
Operating states of 3TK2853
= off
= on
= flashing
LED
Operation
POWER RUN FAULT EMERGENCY
STOP
ON Outputs Cause
Not pressed Pressed On Normal operation
Pressed no function Off EMERGENCY STOP
(protective door) pressed
Not pressed Not pressed Contactors opened;
press ON button to start
Fault
• Fault in electronics
• Change of pin assignment
during operation
• Short-circuit to 24 V
Off
-
No supply voltage
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
162 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.3.6
State diagrams 3TK2853
2) For contact units, see Chapter: Terminal assignment (Page 160)
Figure 3-76 State diagram 3TK2853 autostart
Figure 3-77 State diagram 3TK2853 monitored start
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 163
3.8.3.7
Technical data 3TK2853
3TK2853-2B...
3TK2853-1B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
1
Design of the cascading
cascading and in-service switching
Type of the safety-related wiring of the inputs
single-channel and two-channel
Product feature
transverse contact-secure
Yes
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
—
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 —
Category
• according to EN 954-1 4
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.000000011
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
164 Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2853-2B...
3TK2853-1B...
Number of outputs
as contact-affected switching element
as NO contact safety-related
• as contact-affected switching element as NC contact for
reporting function instantaneous switching
0
• as contact-affected switching element as NO contact
safety-related instantaneous switching
3
• as contact-affected switching element as NO contact
safety-related delayed switching
0
• as contact-less semiconductor switching element
– for reporting function
– non-delayed 0
– delayed switching 0
– safety-related
– non-delayed 1
– delayed switching 0
Stop category
according to DIN EN 60204-1
0
Design of the input
• cascading-input/functional switching Yes
• feedback input Yes
• start input Yes
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 6
– at DC-13 at 24 V A 10
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 6
– at 230 V A 6
Thermal current
of the contact-affected switching element
maximum
A —
Electrical operating cycles as operating time typical
—
Mechanical operating cycles as operating time typical
30 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs required
gL/gG: 10 A
Type of voltage of the controlled supply voltage
DC
Control supply voltage frequency
1
rated value
Hz —
Control supply voltage frequency 2 rated value
Hz
—
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 165
3TK2853-2B...
3TK2853-1B...
Control supply voltage 1 for DC final rated value
• for DC rated value V 24
Operating range factor control supply voltage rated value
of the magnet coil
• at 50 Hz
– for AC —
—
• at 60 Hz
– for AC
—
—
• for DC
0.85
1.1
Product function
• automatic start Yes
• rotation speed monitoring No
• laser scanner monitoring Yes
• light grid monitoring Yes
• light barrier monitoring Yes
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring Yes
• standstill monitoring No
• step mat monitoring Yes
• monitored start-up Yes
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring Yes
• position switch monitoring Yes
• tactile sensor monitoring Yes
• valve monitoring No
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
166 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.3.8
Connection examples 3TK2853
2) For contact units, see Chapter: Terminal assignment (Page 160)
Figure 3-78 Autostart (2-channel)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 167
Figure 3-79 Autostart (1-channel)
Figure 3-80 Monitored start (2-channel)
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
168 Manual, 07/2016, NEB926157502000/RS-AB/003
Figure 3-81 Monitored start (1-channel)
Figure 3-82 Light array monitoring (2-channel) without cross-circuit detection
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 169
Figure 3-83 Cascading
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
170 Manual, 07/2016, NEB926157502000/RS-AB/003
Figure 3-84 without functional operation
Figure 3-85 with isolated contact, functionally operated
Figure 3-86 with non-isolated contact, functionally operated
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 171
3.8.4
3TK2856 / 3TK2857 safety relays
3.8.4.1
Applications
Applications of 3TK2856/57 expansion units
You can use the 3TK2856/57 expansion units in conjunction with all 3TK28/3RA7 basic
units. It is used to expand the enabling circuits.
The maximum achievable performance level PL / Cat. in accordance with
DIN EN ISO 13849-1, or SILCL in accordance with IEC 62061 is equivalent to the PL / Cat. /
SILCL of the basic unit if the external circuitry (connection between basic unit and expansion
unit) is failsafe.
3.8.4.2
Description of function and connection information
The 3TK2856/57 expansion units have two contactor relays as switching elements, one safe
solid-state output, one safe input for cascading and one input for functional switching.
The operating state and functioning are indicated by three LEDs.
On startup, the device runs a self-test in which the internal electronics are checked for
correct functioning.
All internal parts of the circuit are cyclically monitored for faults during operation.
With safe output 2, additional expansion units, such as 3TK2830/56/57 and external
actuators or loads, can be switched.
Also, cascading with units 3TK2841/42/45/53 is possible via safe output 2. In the case of
PLd/e or SILCL 2/3, single-channel cascading is only possible within one cabinet.
Make sure that the actuator/load and the 3TK2856/57 expansion unit have the same ground
potential.
OFF-delay times
The table below provides an overview of the OFF-delay times tv.
Table 3- 6 3TK2856
Rated control supply voltage
US [V]
Start type
OFF delay tV
[s]
Article No.
Screw-type
Article No.
Spring-loaded
24 V DC
-
-
3TK2856-1BB40
3TK2856-2BB40
Table 3- 7 3TK2857
Rated control supply voltage
US [V]
Start type
OFF delay tV
[s]
Article No.
Screw-type
Article No.
Spring-loaded
24 V DC -
0,05 ... 3
3TK2857-1BB41
3TK2857-2BB41
0,05 ... 30
3TK2857-1BB42
3TK2857-2BB42
5 ... 300 3TK2857-1BB44 3TK2857-2BB44
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
172 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.4.3
Structure 3TK2856/57
Front view
No.
Meaning
①
Removable terminal block
②
Display LEDs
③
Terminal blocks
④ Labels
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 173
3.8.4.4
Terminal assignment
Terminal
Description
A1
L/+
A2 N/-
1
Cascade input
2 Safe solid-state output (24V DC / 1A)
3
Power supply for external switches
4
Input for functional switching
13; 14
Contact units (see contact units graphic)
1)
Auxiliary contact units
Figure 3-87 Contact units
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
174 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.4.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
● POWER
● RUN
● FAULT
Operating state of 3TK2856/57
= off
= on
= flashing
LED
Operation
POWER RUN FAULT EMERGENCY
STOP
Op. switching Contactors Output 2 Cause
Self-test on startup approx. 7 s
Closed
Closed
On
On
Normal operation
Open
Off
Contactors off
Open Off Open
EMERGENCY
STOP
For 3TK2857 only
Open
-
On
Off
Time elapsed
Fault
• Fault in electronics
• Contactor welded
Off -
Supply voltage missing
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003 175
3.8.4.6
State diagrams 3TK2856 / 3TK2857
2) For contact units, see Chapter: Terminal assignment (Page 173)
Figure 3-88 State diagram 3TK2856
Figure 3-89 State diagram 3TK2857
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
176 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.4.7
Technical data 3TK2856 / 3TK2857
3TK2856-.B...
3TK2857-.B...
EMC emitted interference
IEC 60947-5-1, IEC 60000-4-3,
IEC 60000-4-5, IEC 60000-4-6
Item designation
• according to DIN 40719 extendable after IEC 204-2
according to IEC 750
KT
• according to DIN EN 61346-2 F
Number of sensor inputs 1-channel or 2-channel
—
Design of the cascading
cascading and in-service switching
Type of the safety-related wiring of the inputs
—
Product feature
transverse contact-secure
No
Safety Integrity Level (SIL) according to IEC 61508
SIL3
SIL claim limit (for a subsystem) according to EN 62061
3
Safety integrity level (SIL)
for delayed release circuit
according to IEC 61508
— SIL3
Performance Level (PL)
• according to ISO 13849-1 e
• for delayed release circuit according to ISO 13849-1 — e
Category
• according to EN 954-1 corresponds to basic unit
• according to ISO 13849-1 4
Safety device type according to IEC 61508-2
Type B
Probability of dangerous failure per hour (PFHD)
with high
demand rate according to EN 62061
1/h 0.000000011
T1 value
for proof test interval or service life
according
to IEC 61508
a 20
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
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3TK2856-.B...
3TK2857-.B...
Number of outputs
as contact-affected switching element
as NO contact safety-related
• as contact-affected switching element as NC contact for
reporting function instantaneous switching
1 0
• as contact-affected switching element as NO contact
safety-related instantaneous switching
6 0
• as contact-affected switching element as NO contact
safety-related delayed switching
0 3
• as contact-less semiconductor switching element
– for reporting function
– non-delayed 0
– delayed switching 0
– safety-related
– non-delayed 1
– delayed switching 0
Stop category
according to DIN EN 60204-1
0 1
Design of the input
• cascading-input/functional switching Yes
• feedback input Yes
• start input Yes
Design of the electrical connection jumper socket
Yes
Switching capacity current
• at AC-15 at 24 V A 4 —
• of the NO contacts of the relay outputs
– at AC-15 at 230 V A 6
– at DC-13 at 24 V A 10
• of the NC contacts of the relay outputs at AC-15
– at 115 V A 6
– at 230 V A 6
Thermal current
of the contact-affected switching element
maximum
A —
Electrical operating cycles as operating time typical
—
Mechanical operating cycles as operating time typical
30 000 000
Design of the fuse link
for short-circuit protection of the
NO contacts of the relay outputs required
gL/gG: 10 A
Type of voltage of the controlled supply voltage
DC
Control supply voltage frequency
1
rated value
Hz —
Control supply voltage frequency 2 rated value
Hz
—
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
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3TK2856-.B...
3TK2857-.B...
Control supply voltage 1 for DC final rated value
• for DC rated value V 24
Operating range factor control supply voltage rated value
of the magnet coil
• at 50 Hz
– for AC —
—
• at 60 Hz
– for AC
—
—
• for DC
0.85
1.1
Product function
• automatic start No
• rotation speed monitoring No
• laser scanner monitoring No
• light grid monitoring No
• light barrier monitoring No
• magnetic switch monitoring Normally closed contact-
Normally open contact
No
• magnetic switch monitoring Normally closed contact-
Normally closed contact
Yes
• emergency stop function Yes
• protective door monitoring No
• standstill monitoring No
• step mat monitoring No
• monitored start-up No
Acceptability for application
• safety-related circuits Yes
• safety cut-out switch Yes
• magnetically operated switches monitoring No
• EMERGENCY-OFF circuit monitoring Yes
• proximity switches monitoring No
• opto-electronical protection device monitoring No
• position switch monitoring Yes
• tactile sensor monitoring No
• valve monitoring No
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
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3.8.4.8
Connection examples 3TK2856 / 3TK2857
2) For contact units, see Chapter: Terminal assignment (Page 173)
Figure 3-90 3TK2823 expanded with 3TK2856/57
Figure 3-91 3TK2841 expanded with 3TK2856/57
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
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Figure 3-92 3TK2853 expanded with 3TK2856/57
Figure 3-93 without functional operation
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
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Figure 3-94 with isolated contact, functionally operated
Figure 3-95 with non-isolated contact, functionally operated
Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
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3TK28 safety relays
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Mounting
4
4.1
Warning notices
Warning notices before installation, wiring, and commissioning
WARNING
Hazardous voltage! Can cause electric shock and burns. Turn off and lock out all power
supplying this device before working on this device.
Mounting
4.2 Mounting the device on a DIN rail
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4.2
Mounting the device on a DIN rail
Requirements
● At the installation location, a horizontal 35 mm mounting rail in accordance with
DIN EN 60715 is properly secured
● Please observe the information about the mounting position in chapter "General technical
data (Page 18)"
DIN rail mounting procedure
Note
The procedure is shown applied to the 45
mm housing. The procedure for 22.5 mm devices
is analogous.
For installation of the 3TK2820, see Section:
Mounting the device on a DIN rail (Page 36)
Step
Operating instruction
Figure
1 Hang the back of the device onto the upper edge
of the DIN rail
2 Press the lower half of the device against the DIN
rail until the device engages
Mounting
4.3 Mounting the device on a level surface
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4.3
Mounting the device on a level surface
Requirements
Please note the following requirements for mounting on a level surface:
● Please observe the information about the mounting position in the chapter "General
technical data (Page 18)".
● Two properly executed drill holes with thread or plug on the level surface
For details of the distances between the drilled holes, please refer to the relevant
dimension drawings in the chapter "Dimension drawings 3TK28 (Page 195)".
● Two screws with a maximum thread diameter of 4.8 mm
● Two plastic securing brackets
Please refer to the accessories list for the relevant article number in the chapter
"Accessories (Page 205)".
Note
The procedure is shown applied to the 45 mm housing. The procedure for 22.5 mm
devices is analogous.
Procedure for mounting on a level surface
Step
Operating instruction
Figure
1 Insert the securing brackets into the openings
provided on the device until they engage.
2 Hold the device up to the surface prepared for
screw fastening.
3 Insert the screws through the oblong holes in the
securing brackets.
4 Screw the device onto the level surface so that it
is secure.
Mounting
4.4 Disassembling the device
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4.4
Disassembling the device
WARNING
Hazardous voltage
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Requirements
● All system interface connections are terminated.
● The terminal blocks have been removed or disconnected.
Note
The procedure is shown applied to the 45
mm housing. The procedure for 22.5 mm
devices is analogous.
Disassembling the device from a DIN rail
Step
Operating instruction
Figure
1
Pull the device down until the lower half
can be pulled away from the DIN rail.
2 Pull the lower half of the device away
from the DIN rail.
3 Lift the device from the upper edge of
the DIN rail.
Mounting
4.4 Disassembling the device
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Disassembling the device from a level surface
Step
Operating instruction
Figure
1
Hold the device firmly.
2 Unscrew the cap screws.
3
Lift the device from the level surface.
4 Remove the securing brackets from the
device.
See also
Disassembling the device (Page 37)
Mounting
4.4 Disassembling the device
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Connection
5
5.1
Connection data for terminal blocks
The following connection data apply dependent on the removable terminal block:
Specification and value
in the case of removable
terminal blocks with screw-type
terminals
Specification and value
in the case of removable
terminal blocks with spring-
loaded terminals
Screwdriver
Cross-tip screwdriver
Size: PZ 2 (⌀ 5 … 6 mm)
Torque: 0.8 … 1.2 Nm
Article No.: 8WA2803
Screwdriver
Size: 0 or 1 (width to 3 mm) for
raising the terminal springs
Article No.: 8WH9200-0AA0
Rigid cable
Maximum number of cables x
cable cross-section:
1 x 0.5 … 4.0 mm2
or
2 x 0.5 … 2.5 mm2
Maximum number of cables x
cable cross-section:
2 x 0.25 … 1.5 mm2
Flexible cable with end
sleeve/cable lug
Maximum number of cables x
cable cross-section:
1 x 0.5 … 2.5 mm2
or
2 x 0.5 … 1.5 mm2
Maximum number of cables x
cable cross-section:
2 x 0.25 … 1.5 mm2
Flexible cable
Not allowed Maximum number of cables x
cable cross-section:
2 x 0.25 … 1.5 mm2
Connection
5.2 Connecting terminal blocks
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5.2
Connecting terminal blocks
WARNING
Hazardous voltage
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Procedure for screw-type terminal blocks
Note
The procedure is shown applied to the 45
mm housing. The procedure for 22.5 mm devices
is analogous.
Step
Operating instruction
Figure
1 Insert the relevant cable into square on the
screw-type terminal until it engages.
2
Hold the cable in the screw-type terminal.
3 Tighten the screw of the terminal in which the
cable is inserted.
4 Pull on the cable to ensure it is screwed tight.
Connection
5.2 Connecting terminal blocks
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Procedure for spring-loaded terminal blocks
Step
Operating instruction
Figure
1 To release the terminal spring, insert the 3-mm
flat-head screwdriver into the square opening
of the spring-loaded terminal until it engages.
Please observe a 10° horizontal angular
deviation of the screwdriver to the oval
opening.
2 Insert the cable into the oval opening as far as
it will go.
3
Hold the cable in the spring-loaded terminal.
4
Remove the screwdriver.
5 Pull on the cable to ensure it is tight.
See also
Connecting terminal blocks (Page 39)
Connection
5.3 Disconnecting
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5.3
Disconnecting
WARNING
Hazardous voltage
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Removing terminal blocks from the device
Note
Order of removal
Remove terminal block A before terminal block B, and C before D.
Note
The procedure is shown applied to the 45
mm housing. The procedure for 22.5 mm devices
is analogous.
Step
Operating instruction
Figure
1 Insert a flat-head screwdriver between the clip
of the terminal block and the front panel ①.
2 Pull the terminal block out to the front
②
.
3 Lift the terminal block out of the mechanically
coded guiderail of the device ③.
Connection
5.3 Disconnecting
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Disconnecting screw-type terminals
Step
Operating instruction
Figure
1
Unscrew the screw of the screw-type terminal.
2 Remove the cable from the unscrewed screw-
type terminal.
Disconnecting spring-loaded terminals
Step
Operating instruction
Figure
1 Insert the flat-head screwdriver into the square
opening of the spring-loaded terminal until it
engages. Please observe a 10° horizontal
angular deviation of the screwdriver to the oval
opening.
2
Remove the cable from the oval opening.
3 Remove the screwdriver.
Connection
5.4 Plugging in terminal blocks
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5.4
Plugging in terminal blocks
WARNING
Hazardous voltage
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Requirements
You must have removed the terminal blocks, for the purpose of replacing a device, for
example.
Procedure when plugging in the terminal blocks
Note
Removable terminal blocks are mechanically coded to prevent polarity reversal
The removable terminal blocks are mechanically coded to prevent polarity reversal and are
labeled with A, B, C or D on the inside. Only use the slots shown in the diagram below.
Note
Plug-in sequence
Connect terminal block B before terminal block A, and D before C.
Note
The procedure is shown applied to the 45
mm housing. The procedure for 22.5 mm devices
is analogous.
Step
Operating instruction
Figure
1 Insert the removable terminal block into the
mechanically coded guiderail of the device
①
.
2
Slide the removable terminal block back until it
audibly engages.
3 Check that the clip of the removable terminal
block closes flush with the front panel ②.
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Dimension drawings
6
6.1
Dimension drawings 3TK28
All dimensions in mm
Figure 6-1 3TK2810/25/26/27/28/34/45 screw-type
Figure 6-2 3TK2810/25/26/27/28/34/45 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
3TK28 safety relays
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Figure 6-3 3TK2820
3TK2820-1...
A
103,6
B
113
3TK2820-2...
A
111,2
B
113
X
≥ 5
Y
≥ 5
Z
≥ 5
Dimension drawings
6.1 Dimension drawings 3TK28
3TK28 safety relays
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Figure 6-4 3TK2821/22/23/24/30 screw-type
Figure 6-5 3TK2821/22/23/24/30 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
3TK28 safety relays
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Figure 6-6 3TK2840/41/42 screw-type
Figure 6-7 3TK2840/41/42 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
3TK28 safety relays
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Figure 6-8 3TK2850/51 screw-type
Figure 6-9 3TK2850/51 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
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Figure 6-10 3TK2852 screw-type
Figure 6-11 3TK2852 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
3TK28 safety relays
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Figure 6-12 3TK2853 screw-type
Figure 6-13 3TK2853 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
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Figure 6-14 3TK2856 screw-type
Figure 6-15 3TK2856 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
3TK28 safety relays
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Figure 6-16 3TK2857 screw-type
Figure 6-17 3TK2857 spring-loaded
Dimension drawings
6.1 Dimension drawings 3TK28
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Accessories
7
Accessories for 3TK28
The following accessories are available for the 3TK28 devices.
Designation
Article number
Suitable for:
Device identification labels
20 mm x 7 mm, pastel turquoise
3RT1900-1SB20 3TK28
Labels
19 mm x 6 mm, pastel turquoise
3RT1900-1SB60 3TK28
Labels
19 mm x 6 mm, zinc yellow
3RT1900-1DB60 3TK28
Push-in lugs
(for screw fastening; 2 are required for each device)
3RP1903 3TK28
Sealable cover
(to secure against unauthorized operation of the setting
elements)
3RP1902 3TK2827; 3TK2828
Sealable cover
(to secure against unauthorized operation of the setting
elements)
3TK2826-0DA00-0HA0 3TK2826
Sealable membrane
(to secure against operation of the setting elements)
3TK2820-0AA00 3TK2820
Screwdriver
for all devices with spring-loaded terminals
3.0 mm x 0.5 mm
3RA2908-1A 3TK28 (with spring-loaded terminals)
Accessories
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