Rockwell Automation 42EF RightSight Photoelectric Sensors with Teach Function - Manual (Page 2)

Publication 75044–124–01(B)
November 2005
Printed in USA
PHOTOSWITCH R is a registered trademark of Rockwell Automation.
Visit our web site at www.ab.com.
Mounting the Sensor
Securely mount the sensor on a firm, stable surface or support. A mounting which is subject
to excessive vibration or shifting may cause intermittent operation. Refer to
www.ab.com/sensors for information on vertical and horizontal adjustment as well as fixed
mounting brackets. The sensor is supplied with a single 18mm mounting nut for either nose or
base mounting options.
Wiring the Sensor
The RightSight photoelectric sensor is available in either a 2m (6.5ft) cable or 4Ćpin micro
quick disconnect as identified on page 1. Rockwell Automation recommends the use of the
889D Series of cordsets and patchords for the QD models. All external wiring should
conform to the National Electrical Code and all applicable local codes.
Configuring the Sensor
These versions of the RightSight contain a teach function with pushbutton rather than a
manual adjustment knob for adjusting the sensors sensitivity level. This function allows the
sensor to learn" both a light and a dark condition (background/target) presented to it and
automatically adjusts sensitivity to its optimal level for the application. Follow the steps below
to configure the sensor for your specific application.
1. Ensure that the sensor is securely mounted and wired. The green LED will be illuminated
indicating that power is applied to the sensor.
2. With the sensor pointed at the light condition, press the pushbutton for five seconds and
then release. The green PWR/STAB LED will turn OFF and the orange SET/SCP LED will
turn ON to indicate that the sensor is learning the light condition. When this condition has
been learned, it will then flash prompting the user to present the dark condition.
3. With the sensor pointed at the dark condition, press the pushbutton for five seconds and
then release. The orange SET/SCP LED will turn ON to indicate that the sensor is learning
the dark condition. When this condition has been learned, it will turn OFF and the green
PWR/STAB LED will turn ON. The sensor is now ready for operation.
Note
S The light condition must be presented first followed by the dark condition. Depending on
the operation, this may be either the background or target.
If there is no background, in the case
of a diffuse sensor, present the target first.
S A flashing green PWR/STAB LED indicates an unstable application condition (little contrast
between the light and dark conditions). If this occurs, the sensor will provide reliable
detection of a target, but may deteriorate over time due to contamination (dirt/dust).
S If insufficient contrast is present between both conditions, it may be necessary to skew the
sensor by up to 20_ or change the reflectivity of one of the conditions. For example, when
using a standard diffuse sense mode, painting a reflective background with a nonreflective
finish may help. With fixed focus sensing modes, it may be necessary to use a model with
different light source color to acheive maximum contrast.
Short-Circuit Protection
RightSight photoelectric sensors provide shortĆcircuit protection (SCP) on the output leads.
This feature is intended to protect the sensor from damage in the event that the output load is
shorted to ground. If this condition does occur, the SCP will activate and the orange LED and
green LED will flash until the source of the short is removed. The SCP limits are set to 100mA
over the entire voltage range.
Wiring Diagrams
10.8–30V DC Sensors
Models with Dual NPN and PNP Outputs
Brown
Blue
White
Black
+
–
+
–
1
2
4
3
Cable QuickĆDisconnect
Brown
White
Black
Blue
1
3 2
4 Load
Load
Load
Load
DC Micro
Note: All wire colors on quick-disconnect models shown refer to Allen-Bradley cordsets.
Dimensions—mm (inches)
10
(0.40)
16.5
(0.65)
10
(0.40)
19
(0.75)
20.5
(0.81)
4
(0.16)
9.6
(0.38)
3.6 (0.145) Diameter
Clearance for #6-32
Screw (2 Places)
M18 X 1.0 Thread
46.7
(1.84) 27.5
(1.08)
27
(1.06)
34.5
(1.36)
1.78
(0.07) 32.7
(1.29)
50.08
(2.0)
28.6
(1.125)
10_Adjustment in
Each Direction
Accessories
Right Angle Bracket #60–2657
Swivel/Tilt Bracket #60–2649
57.15
(2.25)
7.95
(0.31)
Notes
1. Damage may occur to sensor housing if torque above 20in-lb is applied to the 18mm locknut.
2. Optional mounting kit (60–2716) comes with two 75012–025–01, one 75012–097–01 locknut, internal tooth
star washer, and screws/nuts for through-hole mounting.