Time Delay Relays - Application Data Definition: Time Delay is defined as the controlled period between the functioning of two events. A Time Delay relay is a combination of an electromechanical output relay and a control circuit. The control circuit is comprised of solid state components and timing circuits that control operation of the relay and timing range. Typical time delay functions include On-Delay, Repeat cycle (starting off), Interval, Off-Delay, Retriggerable One Shot, Repeat cycle (starting on), Pulse Generator, One Shot, On/Off Delay, and Memory Latch. Each function is explained in the table below. Time delay relays have a broad choice of timing ranges from less than one second to many days. There are many choices of timing adjustments from calibrated external knobs, DIP switches, thumbwheel switches, or recessed potentiometer. The output contacts on the electromechanical output relay are direct wired to the output terminals. The contact load ratings are specified for each specific type of time delay relay. Understanding the differences between all the functions available in time delay relays can sometimes be a daunting task. When designing circuits using time delay relays questions such as: "What initiates a time delay relay?" "Does the timing start with the application or release of voltage?" "When does the output relay come on?" SECTION 5 must be asked. Time delay relays are simply control relays with a time delay built in. Their purpose is to control an event based on time. The difference between relays and time delay relays is when the output contacts open & close: on a control relay, it happens when voltage is applied and removed from the coil; on time delay relays, the contacts will open or close before or after a pre-selected, timed interval. Typically, time delay relays are initiated or triggered by one of two methods: * application of input voltage (On Delay, Interval On, Flasher, Repeat Cycle, Delayed Interval & Interval/Flasher). * opening or closing of a trigger signal (Off Delay, Single Shot & Watchdog). These trigger signals can be one of two designs: * a control switch (dry contact), i.e., limit switch, push button, float switch, etc. * voltage (commonly known as a power trigger). To help understand, some definitions are important: Input Voltage: Control voltage applied to the input terminals (see wiring diagrams below). Depending on the function, input voltage will either initiate the unit or make it ready to initiate when a trigger signal is applied. Trigger Signal: On certain timing functions, a trigger signal is used to initiate the unit after input voltage has been applied. As noted above, this trigger signal can either be a control switch (dry contact switch) or a power trigger (voltage). Output (Load): Every time delay relay has an internal relay (usually mechanical) with contacts that open & close to control the load. They are represented by the dotted lines in the wiring diagrams. Note that the user must provide the voltage to power the load being switched by the output contacts of the time delay relay. The following tables contain both written and visual descriptions on how the common timing functions operate. A Timing Chart shows the relationship between Input Voltage, Trigger Signal (if present) and Output Contacts. 5/2 Magnecraft Solution Guide 105A FUNCTION DEFINITION TABLE Function Operation Timing Chart A. ON DELAY Power On When the input voltage U is applied, timing delay t begins. Relay contacts R change state after time delay is complete. Contacts R return to their shelf state when input voltage U is removed. Trigger switch is not used in this function. U B. REPEAT CYCLE Starting Off When input voltage U is applied, time delay t begins. When time delay t is complete, relay contacts R change state for time delay t. This cycle will repeat until input voltage U is removed. Trigger switch is not used in this function. U C. INTERVAL Power On When input voltage U is applied, relay contacts R change state immediately and timing cycle begins. When time delay is complete, contacts return to shelf state. When input voltage U is removed, contacts will also return to their shelf state. Trigger switch is not used in this function. D. OFF DELAY S Break Input voltage U must be applied continuously. When trigger switch S is closed, relay contacts R change state. When trigger switch S is opened, delay t begins. When delay t is complete, contacts R return to their shelf state. If trigger switch S is closed before time delay t is complete, then time is reset. When trigger switch S is opened, the delay begins again, and relay contacts R remain in their energized state. If input voltage U is removed, relay contacts R return to their shelf state. Upon application of input voltage U, the relay is ready to accept trigger signal S. Upon application of the trigger signal S, the relay contacts R transfer and the preset time t begins. At the end of the preset time t, the relay contacts R return to their normal condition unless the trigger switch S is opened and closed prior to time out t (before preset time elapses). Continuous cycling of the trigger switch S at a rate faster than the preset time will cause the relay contacts R to remain closed. If input voltage U is removed, relay contacts R return to their shelf state. R S close open R on off open R on off Upon application of input voltage U, the relay is ready to accept trigger signal S. Upon application of the trigger signal S, the relay contacts R transfer and the preset time t begins. During time-out, the trigger signal S is ignored. The relay resets by applying the trigger switch S when the relay is not energized. U Input voltage U must be applied continuously. When trigger switch S is closed, time delay t begins. When time delay t is complete, relay contacts R change state and remain transferred until trigger switch S is opened. If input voltage U is removed, relay contacts R return to their shelf state. U Magnecraft Solution Guide 105A t = Time Delay t t t t t close S H. ONE SHOT R = Relay Contacts t t U U S = Trigger Switch t U Upon application of input voltage U, a single output pulse of 0.5 seconds is delivered to relay after time delay t. Power must be removed and reapplied to repeat pulse. Trigger switch is not used in this function. U = Input Voltage t t G. PULSE GENERATOR Input voltage U must be applied continuously. Output changes state with every trigger switch S closure. If input voltage U is removed, relay contacts R return to their shelf state. on off t R When input voltage U is applied, relay contacts R change state immediately and time delay t begins. When time delay t is complete, contacts return to their shelf state for time delay t. This cycle will repeat until input voltage U is removed. Trigger switch is not used in this function. J. MEMORY LATCH S Make t U F. REPEAT CYCLE Starting On I. ON/OFF DELAY S Make/Break on off t SECTION 5 E. RETRIGGERABLE ONE SHOT R t U R R on off on off S close open R on off S close open R on off t t t Pulse t t Pulse t t t t t t t t U S close open R on off 5/3 Advantages of the TDR782 Time Delay Relay Time Setting Select Between 7 Different Time Scales. Marked with Both IEC and NEMA Markings Universal Socket Compatibility. SECTION 5 Socket Compatible Mounts Directly On a DIN Rail or Panel. Time Adjustment Dial Fine Tune the Time Setting. Mating Hold-Down Clip Available Secures Relay to Socket. Output Indication Status at a Glance. Excellent Immunity to Interference Conforms to IEC 61812-1/A11. Input Indication Status at a Glance. 5/14 Magnecraft Solution Guide 105A The miniature TDR782 series is a single-function, single-voltage time delay relay with multiple time ranges for the ultimate in packaging the most within the smallest space possible in a panel or on the DIN rail. The TDR782 features a screw driver adjustable knob which allows the user to choose 1 of 7 timing ranges and a large knob on top for fine tuning the timing setting. This dual adjustment design allows for supreme flexibility and timing accuracy. The dual LEDs allow the user to know when power is present at the coil and when the output is energized. When mated with the Magnecraft sockets and accessories, these ROHS compliant timers provide a complete modular system that will meet all your control relay requirements in a package that is both visually appealing and functionally outstanding. * * * * * * Offers a "one stop solution" for your power management system. Available as a DPDT and 4PDT to meet your individual needs. Switching capabilities of either 3 or 5 amps. The two LED status indicators; indicate status at a glance. Color and appearance designed to high visibility in all environments. Engineering availability allows for customized control system solutions. www.magnecraft.com Magnecraft Solution Guide 105A SECTION 5 The Complete System Solution! 847-441-2540 5/15 TDR782 Time Delay Relay/DPDT, 4PDT, 3 or 5 Amp Rating Socket Compatible Time Adjustment Dial UL Recognized File No. E191122 WHITE Input Indication Output Indication General Specifications (@ 25C) Output Characteristics Number and type of Contacts Contact Material Current rating Maximum permissible current Minimum Switching Requirement Indication (UL 508) Units A A mA On = Energized < 0.01 s LED Input Characteristics Standard Voltage Operating Range SECTION 5 Maximum consumption Indication Timing Characteristics Functions Available Time Scales Time Ranges Available % of Nominal % of Nominal LED 24 AC 120 AC 230 AC 12 DC 24 DC VAC VDC VAC VDC VA VA VA W W (See page 5/3) sec min hr Tolerance Repeatability Temperature Drift Reset Time Mechanical Setting Constant Voltage and Temperature Maximum % % % / C ms Performance Characteristics Electrical Life Mechanical Life Dielectric strength Operations @ Rated Current Unpowered Input to Contacts (Resistive) Environment Product certifications Ambient air temperature around the device Degree of protection Weight 5/16 Standard version Storage Operation V C C grams TDR782XBX DPDT Silver Alloy 5 10 100 Amber TDR782XDX 4PDT Silver Alloy 3 10 100 Amber 24, 120, 230 12, 24 85% to 115% 90% to 110% 1.7 2.6 3 1.5 1.2 Green 24, 120, 230 12, 24 85% to 115% 90% to 110% 1.7 2.6 3 1.5 1.2 Green A (On Delay) 7 0.1....1 1....10 0.1....1 1....10 0.1....1 1....10 10....100 5 0.5 0.05 50 A (On Delay) 7 0.1....1 1....10 0.1....1 1....10 0.1....1 1....10 10....100 5 0.5 0.05 50 100,000 10,000,000 2000 AC 100,000 10,000,000 2000 AC UR, CE, CSA -40...+70 -20...+60 IP 50 43 UR, CE, CSA -40...+70 -20...+60 IP 50 43 Magnecraft Solution Guide 105A www.magnecraft.com Function Operation A. When the input voltage U is applied, timing delay t begins. Relay contacts R change state after time delay is complete. Contacts return to their shelf state when power U is removed. Control switch is not used in this mode. ON DELAY Power On 847-441-2540 Timing Chart TDR782 Relay with the 70-782EL14-1 Socket U R on off t t Standard Part Numbers Input Voltage BOLD-FACED PART NUMBERS ARE NORMALLY STOCKED Functions Available Contact Configuration Rated Load Current Timing Range TDR782XBXA-12D TDR782XBXA-24D TDR782XBXA-24A TDR782XBXA-110A TDR782XBXA-230A 12 VDC 24 VDC 24VAC 110 VAC 230 VAC 0.1s 0.1s 0.1s 0.1s 0.1s to to to to to 100h 100h 100h 100h 100h A A A A A (On (On (On (On (On Delay) Delay) Delay) Delay) Delay) DPDT DPDT DPDT DPDT DPDT 5 5 5 5 5 Amps Amps Amps Amps Amps TDR782XDXA-12D TDR782XDXA-24D TDR782XDXA-24A TDR782XDXA-110A TDR782XDXA-230A 12 VDC 24 VDC 24VAC 110 VAC 230 VAC 0.1s 0.1s 0.1s 0.1s 0.1s to to to to to 100h 100h 100h 100h 100h A A A A A (On (On (On (On (On Delay) Delay) Delay) Delay) Delay) 4PDT 4PDT 4PDT 4PDT 4PDT 3 3 3 3 3 Amps Amps Amps Amps Amps Part Number Builder Contact Configuration XBX = DPDT XDX = 4PDT 0.8 (21) 1.0 (27) 2 3 4 5 6 7 8 9 10 11 3.5 (89.3) 4 1 2 3 2 41 8 5 6 7 8 12 14 9 10 11 13 5 6 7 R 12 1 4 5 8 14 1.1 (27) 4 1 2 5 8 5 6 9 12 13 14 NEMA 14 WIRING DIAGRAMS 8 TERMINAL SQUARE Bottom View BASE DPDT (ON DELAY) Magnecraft Solution Guide 105A 0.2 (5.6) 1 12 NEMA 13 0.14 (3.5) TDR782XBX 8 9 10 Un 9 0.74 (19) 14 14 TERMINAL SQUARE BASE 4PDT (ON DELAY) TDR782XDX 34 70-782EL8-1, 70-782EL14-1 SOCKETS 2.4 (61) 12 13 Input Voltage 12D = 12 VDC 24D = 24 VDC 24A = 24 VAC 110A = 110 VAC 230A = 230 VAC Other mating sockets see Section 2: 70-782E14-1, 70-782D14-1, 70-461-1, 70-378-1, 70-379-1 NOTE: Terminal size is 0.105 x 0.020 (2.68 x 0.508) 1 - - Functions A = ON Delay 9 2.6 (6.5) 1.54 (39.1) SECTION 5 Series TDR782 = 782 Miniature Timer 4 .02 (0.5) 8 12 10 16-TDR782SC Metal Hold-Down Clip See Section 3 14 p.8-11 13 2.3 NEMA .24 (6.0) (59.4) .83 (21) 41 11 41 31 21 12 9 12 11 10 9 44 14 44 34 24 14 8 5 8 7 6 5 42 12 42 32 22 12 4 1 4 3 2 1 3.3 (85) 1 5 9 2 6 1.1 (27.9) 10 3 4 3.1 7 8 11 13 .83 (21) .02 (0.5) 1.1 (27.9) 1.5 (38) A2 14 NEMA .83 (21) (79) 12 1.4 (35.5) 11 IEC: NEMA: A1 2.6 INPUT (6.5) 13 1.54 .24 (39.1) (6.0) 14 DPDT A2 IEC: NEMA: A1 14 INPUT 13 .24 (6.0) 4PDT 5/17