111248-001 Rev 03Cutler-Hammer
Instruction Manual—SM Series, Perfect Prox®
and Standard Diffuse Reflective Photoelectric Sensors
Mounting
sensor using
a jam nut.
Mounting
sensor using
#6 hardware.
INTRODUCTION
The SM Series is a cost-effective photoelectric sensor family for use
in a variety demanding industrial applications. They have high
optical performance for reliable sensing, and their compact size
allows use in tight spaces.
The sensors feature TargetLock™ for easy installation and set up.
TargetLock™, a powerful alignment aid, tells you exactly when the
sensors are on target for optimum performance. Sensor status is
quickly available at a glance from the highly visible indicating LEDs.
Standard Diffuse Reflective Sensors
A diffuse reflective sensor operates by shining a beam of light out
through the lens. An object that comes within the sensor’s view
reflects part of this beam of light back to the sensor causing the
sensor to detect the object. The maximum range at which a given
object can be detected depends on how well its surface reflects
light—the less light it reflects back, the shorter the range. The ability
of a surface to reflect light depends primarily upon its material of
construction, color, and texture.
Perfect Prox® Sensors
A Perfect Prox sensor is a special diffuse reflective sensor that
includes precise background rejection. It has all of the sensing
power of a standard diffuse reflective sensor, but ignores any object
past a defined cutoff range. In addition to ignoring unwanted
background objects, the Perfect Prox can sense objects of different
color or reflectivity at virtually the same range. This makes the
Perfect Prox one of the most reliable and simple sensors to set up
and use.
MOUNTING
The SM sensor features two
mounting holes in the rectangu-
lar section of the body for
mounting to a surface with #6
or smaller hardware. In addition,
the threaded barrel and jam nut
allow mounting into any 0.75
inch (19 mm) hole, or a selection of accessory mounting brackets.
USING TARGETLOCK™
Alignment: The TargetLock LED provides a quick and easy way to
set up the sensor for optimum operation. As you approach the best
alignment and range, the LED changes from short flash, to long
flash, to a solid ON condition. Refer to the set-up procedures in the
next section.
Maintenance: Another valuable feature of the TargetLock LED is to
indicate the need for maintenance prior to loss of sensor operation.
Observing a change from the normal operation of the LED when a
target is present (for example, from solid ON to a long flash)
indicates the gain has been reduced. This may be due to such
things as sensor being bumped or vibrated out of alignment or
contamination on the lens.
WARNING
IN ORDER TO AVOID ELECTRIC SHOCK OR OTHER POSSIBLE INJURY:
• Do not use this product for human safety applications. It was not
designed, tested or recommended for this use.
• Do not use this product in hazardous locations (e.g. explosive
atmospheres). It was not designed, tested or recommended for
this use.
• Insure that the product is connected to the correct power supply
for the application. Refer to the wiring diagrams in this manual.
• Do not use tools to apply force or torque directly to the sensor
body. Align the sensor by hand before tightening the mounting
hardware.
• Use #6 or smaller mounting hardware. Use of larger hardware
can damage the sensor and possibly expose hazardous live
voltages.
• AC/DC connector version sensors are equipped with an AC-type
connector. The use of DC power with AC-type connectors may not
conform with established standards.
PERFECT PROX
50 mm Range Models
E65-SMPPO50-GL ..........AC/DC .... 3-Wire .... Cable ................. Light Operate
E65-SMPP050-GD ..........AC/DC .... 3-Wire .... Cable ................. Dark Operate
E65-SMPP050-GLD ........ AC/DC .... 3-Wire .... Connector ......... Light Operate
E65-SMPP050-GDD ........ AC/DC .... 3-Wire .... Connector ......... Dark Operate
E65-SMPP050-HL ........... DC ......... 4-Wire .... Cable ................. Light Operate
E65-SMPP050-HD ..........DC ......... 4-Wire .... Cable ................. Dark Operate
E65-SMPP050-HLD ........ DC ......... 4-Wire .... Connector ......... Light Operate
E65-SMPP050-HDD ........ DC ......... 4-Wire .... Connector ......... Dark Operate
100 mm Range Models
E65-SMPP100-GL ........... AC/DC .... 3-Wire .... Cable ................. Light Operate
E65-SMPP100-GD ..........AC/DC .... 3-Wire .... Cable ................. Dark Operate
E65-SMPP100-GLD ........ AC/DC .... 3-Wire .... Connector ......... Light Operate
E65-SMPP100-GDD ........ AC/DC .... 3-Wire .... Connector ......... Dark Operate
E65-SMPP100-HL ........... DC ......... 4-Wire .... Cable ................. Light Operate
E65-SMPP100-HD ..........DC ......... 4-Wire .... Cable ................. Dark Operate
E65-SMPP100-HLD ........ DC ......... 4-Wire .... Connector ......... Light Operate
E65-SMPP100-HDD ........ DC ......... 4-Wire .... Connector ......... Dark Operate
STANDARD DIFFUSE REFLECTIVE
200 mm Range Models
E65-SMSD200-GL ..........AC/DC .... 3-Wire ..... Cable ................ Light Operate
E65-SMSD200-GD ..........AC/DC .... 3-Wire ..... Cable ................ Dark Operate
E65-SMSD200-GLD ........ AC/DC .... 3-Wire ..... Connector ........ Light Operate
E65-SMSD200-GDD ........ AC/DC .... 3-Wire ..... Connector ........ Dark Operate
E65-SMSD200-HL ..........DC ......... 4-Wire ..... Cable ................ Light Operate
E65-SMSD200-HD ..........DC ......... 4-Wire ..... Cable ................ Dark Operate
E65-SMSD200-HLD ........ DC ......... 4-Wire ..... Connector ........ Light Operate
E65-SMSD200-HDD ........ DC ......... 4-Wire ..... Connector ........ Dark Operate
The following models are covered in this manual:
111248-001 Rev 03Page 2
Effective 5/00
SENSOR LOCATION AND SET-UP
Select a mounting location with a clear view of the object to be
detected. Mount the sensor so that the sensing beam is aimed at
the most suitable part of the target object. The actual setup
procedure varies slightly depending on your sensor type:
Standard Diffuse Reflective
Remove the target from the beam and apply power to the sensor. If
the TargetLock LED is ON or flashing, then you are detecting a
background object. Eliminate the object or reduce the gain using the
gain adjustment on the sensor. Place the target in the sensing beam.
The TargetLock LED should be on steady. If it is not, adjust the
sensor alignment, the sensor gain, or move the sensor closer to the
object until the LED lights steady. Remove the target and check for
background detection again (hysteresis latch-up after sensing an
object). Repeat procedure if necessary. If you are unable to avoid
background detection, consider using a Perfect Prox. After setup,
tighten all mounting hardware.
Perfect Prox
Remove the target from the beam and apply power to the sensor. If
the TargetLock LED is ON or flashing, then you are detecting a
background object. Eliminate the object or move the sensor farther
from the object. Place the target in the sensing beam. The Target-
Lock LED should be on steady. If it is not, move the sensor closer
or farther away until you find the range where the LED lights steady.
Position the sensor in the center of this range. Remove the target
and check for background detection again (hysteresis latch-up after
sensing an object). Repeat procedure if necessary. After setup,
tighten all mounting hardware.
PERFECT PROX APPLICATION HINTS
Perfect Prox sensors combine high excess gain with a sharp cut-off.
The optics that provide this performance can also make it possible
to misapply the sensor, giving the appearance of a malfunction.
Simple adjustments alleviate these application problems. Following
is a simplified description of how the Perfect Prox works, and tips on
adjusting the sensor for proper performance.
WHY MAKE A PERFECT PROX?
Diffuse reflective mode photoelectric sensors use high excess gain
to reliably detect targets with low reflectance (dark color, rough
texture, etc.). Since higher reflectance objects reflect more light, they
will be detected at a much greater distance. When sensing a target
against a background with higher reflectance, reliability problems
can occur.
We developed Perfect Prox to have the
high gain needed to detect low
reflectance targets, but with a sharp
cut-off to reject backgrounds. The
excess gain graph clearly shows this
gain cut-off.
HOW A PERFECT PROX WORKS
To get high gain and the sharp cut-off,
the sensor has 2 different detectors.
The first is the near detector. It has a range (for the 2-inch model) of
0 to 24 inches. The second is the far detector with a range of 2 to
24 inches. Objects closer than 2 inches are detected by only the
near detector. Objects farther than 2 inches will be detected by both
detectors. If the near signal is stronger than the far signal, the
sensor output is “on”. If the far signal is stronger than or equal to
the near signal, the output is
“off.” The result is a sensor
with high excess gain for 2
inches followed by a sharp
cutoff.
1000
10
110.1 10 10
0
RANGE (inches)
EXCESS GAIN
100
RANGE (mm)
252.5 254 254
0
FAR DETECTOR
FIELD
NEAR DETECTOR FIELD
CUT-OFF
DISTANCE
SENSOR
LED Function State Condition
Green Power ON Power is applied to sensor
OFF No power
Red Output ON Output is ON
OFF Output is OFF
Flashing Output is short circuited or
overloaded
Orange TargetLock™ ON Target present—excellent gain,
Alignment Aid operating within optimum range
Long Flash Target present—good gain
Short Flash Target present—poor gain
OFF No target or sensor beyond range
TargetLock™
(Orange)
Output (Red)
Power (Green
)
Gain
Adjust
LED Indicator
s
INDICATIONS AND ADJUSTMENTS
The SM Sensor features an advanced LED indicator
display to provide information concerning sensor
alignment and operating status.
Gain Adjustment
Diffuse reflective sensors include an adjust-
ment control for optimizing the amount of
gain for the application. The 270° pot provides
a 10:1 adjustment of gain. A mechanical stop
reduces the possibility of sensor damage due to
over rotation.
Target
Object
Background
Object
Working
Range
Detection
Zone
Target
Object
Required Range
Limit
The detector “sees”
light when the
target surface enters
the Detection Zone.
The Perfect Prox has
the ability to ignore
background objects
just beyond the
maximum range. This
is known as cutoff range.
111248-001 Rev 03 Page 3
Effective 5/00
SOLUTION:
Rotate sensor 90 degrees so
metal plate reflects to both
near and far detectors. METAL
PLATE
NEAR AND FAR
DETECTOR FIELDS
CUT-OFF
DISTANCE
SENSOR
FAR
DETECTOR FIELD
NEAR DETECTOR
FIELD
CUT-OFF
DISTANCE
PROBLEM:
Highly polished metal plate in
background reflects only to near
detector and is falsely detected.
SENSOR
METAL
PLATE
FAR
DETECTOR
FIELD
NEAR
DETECTOR FIELD
SENSORSENSOR
PROBLEM:
As part B enters the near field, the sensor turns on,
giving a “false” pulse, until B enters the far field.
A
BA
B
SOLUTION:
Rotate the sensor 90 degrees. Now part B
enters the near and far fields simultaneously.
APPLICATION:
Verify part A is placed
on top of part B as they
move by on a conveyor.
DIRECTION OF MOTION
DETECTING TARGETS MOVING PARALLEL TO SENSOR’S LENS SURFACE
When one object is to be detected as it moves on a second
“background” object, the background may cause a “false” pulse if
the sensor is not oriented properly.
To avoid these pulses, the target must enter and leave both fields
simultaneously. This is easily done by having the object approach
the sensor as shown in the illustration.
APPLICATION DIFFICULTIES?
As you can see, the sensor lens is divided in half. When the sensor
is oriented so that one half is above the other, the two detection
fields are stacked one on top of the other (see previous illustration).
Application difficulties with Perfect Prox usually come from targets or
backgrounds that reflect unequally to these two detectors.
Fortunately, these problems are easily remedied by slight readjust-
ment of the sensor’s mounting. NOTE: Backgrounds that cause
specular reflections, such as mirror-like surfaces, can occasionally
reflect more light to the near detector than to the far detector. This
will cause detection at distances greater than the sensor’s cutoff
range, resulting in a false “ON” condition. To avoid this, dull the
surface to a matte finish, or angle the sensor or background to
eliminate direct reflections.
The following examples are simple solutions to three specific
problems that can occur when installing the Perfect Prox sensor. All
drawings exaggerate field placement for purposes of illustration.
BACKGROUND OBJECTS CAUSING UNEQUAL REFLECTIONS
Any background object that reflects light to only one detector can
cause problems. Reflections to only the near detector can cause a
false “on” condition. (These reflections can come from objects up to
2 feet away for diffuse objects, or 10 feet away for retroreflectors
and mirrors.) If the background object reflects only to the far
detector, it may provide enough signal that the sensor cannot detect
a near object. If the background object does not reflect enough light
to be detected, it may reflect enough that the sensor will lock up and
not turn “off” after a near target has left the sensor’s field of view.
To solve these problems, rotate the sensor 90° to direct reflections
to both detectors. Aiming the sensor at an angle to the background
may also bring the background into the field of view of both
detectors.
FAR
DETECTOR FIELD
NEAR DETECTOR
FIELD
CUT-OFF
DISTANCE
PROBLEM:
Target moving “off axis” toward sensor, reflects only
to near detector and is detected too soon.
SENSOR
DIRECTION
OF MOTION
FAR
DETECTOR FIELD
NEAR DETECTOR
FIELD
CUT-OFF
DISTANCE
SOLUTION:
Reposition sensor or target so target moves
on sensor's optical axis.
SENSOR
DIRECTION
OF MOTION
NEAR AND F AR
DETECTOR FIELDS
CUT-OFF
DISTANCE
SOLUTION:
If sensor or target cannot be repositioned,
rotate sensor 90 degrees so target
reflects equally to both detectors.
SENSOR
DIRECTION
OF MOTION
DETECTING TARGETS MOVING HEAD-ON TOWARDS THE SENSOR
WIRING DIAGRAMS
Pin numbers are for reference only, rely on pin location when wiring.
Mode Cable Models Micro-Connector Models*
3-Wire AC/DC Models (18-264 VAC, 50/60 Hz or 18-50 VDC)
All
Sensors
4-Wire DC Models (10-30 VDC)
All
Sensors
(-) +V
Load
Load
BU
WH
(-)
BK Load
BN +V
Load
Sometimes you need to detect
an object as it approaches the
sensor head on. If the object
is not centered on the
sensor’s optical axis, it may
reflect into just one of the
detectors. The result is that
the Perfect Prox will either not
sense at all, or will act as a
regular diffuse reflective
sensor and detect the object
at too great a distance.
Repositioning the sensor or
the object so that the object
travels on the sensor’s optical
axis will solve the problem.
You may also relocate the
sensor so that the object
moves in a plane parallel to
the sensor’s lens surface.
BU
WH
BK Load
BN L1 or (-)
L2 or +V
N.C.
L2 or +V
L1
or (-)
Load
N.C.
Effective 5/00
Printed in U.S.A.
111248-001 Rev 03
Cutler-Hammer
720 80th Street SW
Everett, WA 98203-6299
425/513-5300 Fax: 425/513-5302
www.cutlerhammer.eaton.com
Page 4
Still Need Help?
Contact the
Cutler-Hammer Sensor
Application Engineers
1-800-426-9184
Fax: 425-513-5356
OPTICAL PERFORMANCE
All optical specifications are guaranteed
to be the minimum performance under
clean conditions of any product delivered
from stock. Typical performance may be
higher. Dirt in the environment will affect
optical performance by reducing the
amount of light the control receives. For
best results, sensors should be used at
distances where excess gain is higher
than 1.5 (1.5 times the amount of
sensing power required to detect an
object under ideal conditions). Higher
excess gain will allow the sensor to
overcome higher levels of contamination
on the lens.
50 mm Perfect Prox 100 mm Perfect Prox Diffuse Reflective
Maximum 2 inches 4 inches 8 inches
Range (50 mm)* (100 mm)* (200 mm)
Optimum 0.4 to 1.8 inches 0.5 to 3 inches 0.25 to 5 inches
Range (10 to 45 mm) (13 to 76 mm) (6 to 127 mm)
Cutoff 2.3 inches (58 mm) 5 inches (127 mm) - - -
Range & beyond & beyond
Field of 0.25 inch (6 mm) 0.35 inch (9 mm) 2 inch (50 mm)
View diameter at diameter at diameter at
2.25 inches (57 mm) 5 inches (127 mm) 5 inches (125 mm)
1. 50 mm Perfect Prox
2. 100 mm Perfect Prox
3. Diffuse Reflective
(based on a 90% reflectance
white card)
* Nominal Range
1000
10
110.1 10 10
0
RANGE (inches)
EXCESS GAIN
100
RANGE (mm)
252.5 254 254
0
21 3
AC/DC Models (AC Operation) AC/DC Models (DC Operation) DC Models
Input Voltage 18-264 VAC, 50/60 Hz 18-50 VDC 10-30 VDC
Power Dissipation 4 VA maximum 4 VA maximum 2 W maximum
Output Type VMOS (bi-directional) NPN (Sink) NPN and PNP (dual outputs)
Current Switching 200 mA maximum 200 mA maximum 100 mA maximum
Voltage Switching 264 VAC 50 VDC 30 VDC maximum
Off-State Leakage 500 µA maximum 500 µA maximum 10 µA maximum
Surge Current 2 A maximum 2 A maximum 1 A maximum
On-State Voltage Drop 3.5 V maximum 3.5 V maximum 2.5 V maximum
Response Time 16 mS 1.5 mS 1 mS
Short Circuit Auto reset short circuit and overload protection (Output Indicator LED will flash); IMPORTANT: During installation,
Protection correct power connections must be made first to ensure fail-safe short circuit protection of the outputs.
Light/Dark Operation By model
Temperature Range Operating: -13° to +131° F (-25° to +55° C); Storage: -13° to +158° F (-25° to +70° C)
Material of Construction Lens: Polycarbonate; Cable jacket: PVC; Body: Cycoloy
Cable/Connector 6.5 foot (2m) 4-wire cable; or 4-pin, micro connector (AC-key on AC/DC models; DC-key on DC models)
Vibration and Shock Vibration: 30 g over 10 Hz to 2 kHz; Shock: 50 g for 10 mS 1/2 sinewave pulse
Indicator LEDs Green LED: Power; Red LED: Output; Orange LED: TargetLock™
Source Light Visible Red, 660 nm
Gain Adjustment 3/4-turn pot, 10:1 adjustment of gain (provided on thru-beam and diffuse reflective sensors only)
Sunlight Immunity Perfect Prox: 5,000 footcandles; All others: 10,000 foot-candles
Enclosure Ratings NEMA 1, 3, 4, 4X,6, 6P, 12, and 13; IP 68
(Our products conform to NEMA tests as indicated, however, some severe washdown applications can exceed these
NEMA test specifications. If you have questions about a specific application, contact our Applications Department.)
Approvals CE Compliant; Contact factory for the latest list of approvals
SPECIFICATIONS
APPROXIMATE DIMENSIONS
1.70
(43) 0.83
(21)
0.75 (19)
ø 0.16 (4)
2 places
1.51
(38) 1.02
(26)
M18 x 1.0
Connector
Models
0.41 (10)
Cable
Models
0.35 (9)
1.47
(37)
1.05
(27)
0.58
(15)
0.10
(2.5)
1
.63
(41)
AC/DC Models Only
1.29 (33)
