Cut Sheet

Volume 8—Sensing Solutions CA08100010E—July 2015 www.eaton.com V8-T5-49
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5.4
Photoelectric Sensors
SM Series Sensors
Product Overview
Unparalleled Optical
Performance—Perfect Prox
Exceptional background
rejection sets Perfect Prox
apart from all other sensors.
Just point the sensor’s visible
beam at the target and get
reliable detection regardless
of color, reflectance, contrast
or surface shape, while
ignoring background objects
just a fraction of an inch away.
Fast and Easy Setup
The SM Series features an
advanced 3-LED indicator
display to provide valuable
information at a glance.
The bright display is clearly
visible from 360°. In addition
to LEDs for power and output
status indication, the SM
features a third LED that is
part of the TargetLock
system.
TargetLock is a
microprocessor- controlled
system that enables you to
quickly and easily align the
sensor and ensure it is
operating most reliably.
●
Alignment: The
TargetLock LED provides a
quick and easy way to set
up the sensor for optimum
operation. On initial setup,
when you have achieved
the minimum signal
required for the sensor to
operate, the TargetLock
LED will blink in a short
flash pattern. As you
improve the setup and
approach the best
alignment and range, the
LED changes from short
flash to long flash to a solid
ON condition. This means
that even after you reach a
point where the sensor will
operate in the application,
you are able to further fine
tune the setup for highest
reliability.
LED Indicators
Note
1
A target that doesn’t fully block the effective sensing beam or is translucent
may cause a flashing indication and unreliable performance.
LED State
Thru-Beam/Reflex
LED Condition
Diffuse/ Perfect Prox
LED Condition
Power (green) ON Power is applied to sensor Power is applied to sensor
OFF No power No power
Output (red) ON Output is ON Output is ON
OFF Output is OFF Output is OFF
Flashing Output is short circuited or
overloaded
Output is short circuited or
overloaded
Target-Lock
(orange)
ON Excellent alignment; sensor
is operating within optimum
range
Target present—excellent
gain; sensor is operating within
optimum range
Long flash Good alignment
1
Target present—good gain
Short flash Poor alignment
1
Target present—poor gain
OFF Target is present; if no target
present, sensor is out of
alignment or beyond range
No target, or sensor is beyond
range
●
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 (for example, from
solid ON to a long flash)
indicates the gain has been
reduced. Possible causes
include bumping or
vibrating out of alignment
or contamination buildup
on the lens. With the
TargetLock LED, you are
made aware of this
condition before the
sensor stops working,
allowing you ample time to
address the problem
before your machine goes
down.
See table (this page) for
details of the function of
each of the SM Series
LED indicators.
Gain Adjustment
Thru-beam and diffuse
reflective 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 eliminates
the possibility of sensor
damage. Adjustment of the
control does not require any
special tools.
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. The threaded
barrel and jam nut allow
mounting into any 0.75 in
(19 mm) hole or a selection
of accessory mounting
brackets available from
Eaton and detailed in Ta b 8 ,
section 8.2.
Mounting Sensor using
#6 Hardware
Mounting Sensor using
a Jam Nut
Mounted SM Sensor in
18 mm Ball Swivel Bracket
See Ta b 8 , section 8.2.