111248-002 Rev 03Cutler-Hammer
Instruction Manual—SM Series™, Thru-beam
and Polarized Reflex Photoelectric Sensors
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™ is 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.
Thru-Beam Sensors
Thru-beam sensors consist of a source and detector positioned
on opposite sides of a detection zone. The source emits visible
red light, which is received by the detector. The detector output
switches when this beam of light is either blocked (when set for
dark operation), or completed (light operation).
Polarized Reflex Sensors
A reflex sensor has both a light source and detector in the same
unit. The source sends a beam of light to a retroreflector which
returns it back to the detector. A break in the light beam causes
the sensor to change output state. The visible red light beam
aids in alignment of the sensor with its retroreflector.
Polarized models are used to reliably detect shiny targets that
may reflect the light beam back to the sensor instead of
interrupting the beam. The polarizing filter conditions the beam
so that light reflected off the retroreflector is detected, but light
reflected by the target is not.
MOUNTING
The SM sensor features two mounting holes in the rectangular
section of the body for mounting to a surface with #6 or
smaller hardware. In addition, the threaded barrel and jam nut
allows mounting into any 0.75 inch (18.5 mm) hole, or a
selection of accessory mounting brackets.
Mounting
sensor using
a jam nut.
Mounting
sensor using
#6 hardware.
The following models are covered in this manual:
THRU-BEAM
15M Range Models
E65-SMTS15-HA ............DC Source ............... Cable
E65-SMTS15-HAD ..........DC Source ............... Connector
E65-SMTD15-HL ............DC Detector............. Cable .............. Light Operate
E65-SMTD15-HD............DC Detector............. Cable .............. Dark Operate
E65-SMTD15-HLD..........DC Detector............. Connector ...... Light Operate
E65-SMTD15-HDD .........DC Detector............. Connector ...... Dark Operate
POLARIZED REFLEX
3M Range Models
E65-SMPR3-GL .............. AC/DC.... 3-Wire ..... Cable .............. Light Operate
E65-SMPR3-GD..............AC/DC.... 3-Wire ..... Cable .............. Dark Operate
E65-SMPR3-GLD............AC/DC.... 3-Wire ..... Connector ...... Light Operate
E65-SMPR3-GDD ...........AC/DC.... 3-Wire ..... Connector ...... Dark Operate
E65-SMPR3-HL ..............DC ......... 4-Wire ..... Cable .............. Light Operate
E65-SMPR3-HD..............DC ......... 4-Wire ..... Cable .............. Dark Operate
E65-SMPR3-HLD............D C ......... 4-Wire ..... Connector ...... Light Operate
E65-SMPR3-HDD ...........DC ......... 4-Wire ..... Connector ...... Dark Operate
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 LOCA TIONS (E.G.
EXPLOSIVE A TMOSPHERES). IT W AS NOT DESIGNED, TESTED OR
RECOMMENDED FOR THIS USE.
• INSURE THA T 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 ONLY #6 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 MA Y NOT CONFORM WITH EST ABLISHED ST AN-
DARDS.
111248-002 Rev 03Page 2
Effective 5/00
Working
Range
Effective
Beam Diameter
(Detection Zone)
Source Beam
Pattern
Detector
Field of View
Source
Detector
The detector must be placed
within the source beam pattern
(the area containing all
the light rays emitted
by the source).
The source must be placed
within the detector
field of view for the
detection system
to operate.
Only the light
source rays that
travel in a straight line
to the receiver (the diameter
of the lens) will be detected.
An object must fully block this
beam in order to be detected.
THRU-BEAM MOUNTING LOCATION AND SETUP
Mount the source and detector units so they are aimed
directly at each other from opposite sides of the target. (The
detector should be on the dirtier side because the light
scattering effect of dirt collecting on the lens is less
significant if it takes place at the detector.) Ensure that the
area of the target to be detected will block the entire
effective beam (see illustration at right). Apply power to
both units.
Accurate sensing depends on proper alignment of the
source and detector. To begin, position the source and
detector in rough alignment so that source light is received
by the detector and the TargetLock LED on the detector
starts to flash. If the LED will not flash in any position, you
may need to reduce the distance between the source and
detector, or follow one or both of these two rough alignment
methods:
1. The source emits visible red light. Look at the source with
your eye positioned close to the detector. Mount the detector
in the area where the source light is brightest.
2.Place a retroreflector over the lens of the detector. Look at
the detector with your eye positioned close to the source.
Mount the source in the area where the light reflected from
the retroreflector is the brightest.
Obtain final alignment by rotating the detector back and forth in
the horizontal axis to find the position where the TargetLock
LED lights steady, or has the longest flash. Now tilt the
detector up and down vertically to find the position where the
LED lights steady or has the longest flash. Tighten the detector
in place. Now repeat final alignment procedure for the source.
If the LED will not light steady, decrease the distance between
the source and detector and repeat this procedure. After
alignment, tighten all mounting hardware.
TargetLock™
(Orange)
Output (Red)
Power (Green)
Gain
Adjust
LED Indicators
LED Function State Condition
Green Power ON Power is applied to sensor
OFF No power
Red Output O N Output is ON
OFF Output is OFF
Flashing Output is short circuited or
overloaded
Orange TargetLock™ ON Excellent alignment—sensor is
Alignment Aid operating within optimum range
Long Flash Good alignment*
Short Flash Poor alignment*
OFF Target is present;
sensor is out of alignment or
If no target is present: beyond
range
*A target that doesn’t fully block the effective sensing beam or is translucent
may cause a flashing indication and unreliable performance.
INDICATIONS AND ADJUSTMENTS
The SM Sensor features an advanced LED
indicator display to provide information
concerning sensor alignment and status.
Gain Adjustment
Thru-beam sensors include an
adjustment control for optimizing the
amount of gain for the application.
The 3/4-turn pot provides a 10:1
adjustment of gain. A mechanical stop
reduces the possibility of sensor damage
due to over rotation.
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 no 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.