Rockwell Automation Allen-Bradley VisiSight 42JT Series User manual

Installation Instructions
42JT VisiSight™ Photoelectric Clear Object Sensors
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Default Settings:
Output Mode: Dark Operate (Output ON when the light
between sensor and reflector is blocked)
Output Type: Auto PNP or NPN (The sensor monitors the load
connection continuously and automatically configures the
output to PNP or NPN)
Sensor User Interface
LED Status
The table below provides LED status in the RUN mode i.e., during
operation, the sensor is always in RUN mode, except when being
taught.
Mounting the Sensor
Securely mount the sensor on a firm, stable surface or support.
An application which is subject to excessive vibration or shifting
may cause intermittent operation. For installation convenience,
Rockwell Automation offers a wide range of mounting brackets
(see the Accessories section for more details).
Green
OFF Power is OFF
ON Power is ON
Flashing (6 Hz) Unstable light level (0.5 <
margin < 2)
Flashing (1.5 Hz) Output short circuit protection
active
Yellow OFF Output de-energized
ON Output energized
Yellow LED Pushbutton
Green LED
General Specifications
Replace with A2 for 2 m cable, F4 for 4-pin DC micro (M12) QD, P4 on
4-pin DC pico (M8) QD.
ECOLAB on P4 and A2 models only
UL: -20…+50°C (-4…122°F)
Alignment Indication
For short range applications the visible light beam of the sensor
suffices as alignment aid.
The alignment feature may be used for longer range applications.
Alignment of the sensor is indicated via change in intensity of the
green LED in the Alignment Mode, as follows:
1. Press and release the pushbutton twice within three seconds.
After three seconds, the green LED turns OFF for 0.5 second
indicating the sensor is in the alignment mode.
2. Align the sensor to the reflector. The intensity of green LED
increases with better alignment. Secure it in a position that
42JT-C2LAT1-
Environmental
Certifications cULus and CE Marked for all applicable directives
Operating Environment IP67, IP69K, ECOLAB
Operating Temperature [C (F)] -20…+60° (-4…+140°)
Storage Temperature [C (F)] -20…+80° (-4…+179°)
Optical
Light Source Visible red 660 nm
Sensing Range 0…2 m (0…6.6 ft)
Adjustments Pushbutton
Electrical
Voltage 10…30V DC
Current Consumption 30 mA max.
Sensor Protection Reverse polarity, short circuit protection
Outputs
Response Time 0.5 ms
Output Type Auto NPN or PNP
Output Function Selectable light operate or dark operate
Output Current 100 mA max.
Output Leakage Current 10 μA max.
Mechanical
Housing Material ABS
Lens Material PMMA
Cover Material PMMA
Connection Types 2 m PUR cable, 4-pin DC micro (M12) QD ona 150 mm
PUR pigtail, 4-pin pico (M8) integral QD
Optional Accessories Mounting brackets, cordsets

2
yields the highest intensity of the green LED. Press and release
the button once to return to the RUN mode—or the sensor
returns to the RUN mode automatically in two minutes.
VisiSight™ Configuration
The 42JT VisiSight is configured using the pushbutton (or Remote
Teach) and the LED indicators on the sensor. There are five
features that can be configured:
• Static Teach: Standard sensitivity/sensing range adjustment
• Dynamic Teach (running process)
• Light operate (LO) or dark operate (DO) output
• Auto PNP/NPN, dedicated NPN or dedicated PNP
• Pushbutton lock/unlock
The sensor output is disabled during Teach.
Teach Sensitivity/Sensing Range
Static Teach:
Teaching the sensitivity/sensing range is a two step process:
Standard Teach:
1. Install and align the reflector
2. Teach reflector as target:
Align the sensor to the reflector. Press and hold button for three
seconds until the yellow LED starts flashing. Release the button.
The reflector has now been aligned.
With the reflector in the sensor’s field of view, press and release
the button. The teach process is complete.
If the push button is not pressed within 30 seconds, the sensor
exits teach mode and returns to RUN mode without learning
new setting.
t > 3 s
Reflector
t < 0.5 s
Reflector
Dynamic Teach (Running Process):
If the targets to be detected are moving with the sensor aimed at
the running process, press and hold the button for three seconds
until the yellow LED starts flashing. The sensitivity will
automatically be taught in the next 30 seconds provided the
sensor sees two cycles of “target” and “no target.”
Teach Light Operate (L.O.) or Dark Operate (D.O.)
The default setting of the output is Dark Operate (DO)
DO setting means that output turns ON when the target is
detected. If the application requires the output to turn OFF when
the target is detected, the setting may be changed to Light
Operate (LO).
1. To access the teach output mode setting:
2. To change the sensor output mode setting:
Output Type Selection:
Auto PNP/NPN, Dedicated NPN, Dedicated PNP)
The default setting is Auto PNP/NPN. This means the sensor
monitors the load connection and automatically configures for
the proper operation, i.e., PNP or NPN.
The following applications are covered with dedicated PNP or
dedicated NPN selection:
a. Parallel wiring of multiple sensor outputs: select dedicated
PNP or dedicated NPN setting, as needed.
b. If the load is connected for NPN configuration but to a
different power supply than the power to the sensor or via a
load enabling contact (e.g., a relay contact in series with the
load): select dedicated NPN.
Selection can be made as follows:
1. To access output type: Press and hold the pushbutton for
nine seconds (until both LEDs start flashing synchronously). At
the release of the button, the current setting of output type is
indicated by the slow flashing of the LED (or LEDs) as follows:
Press and hold button for six seconds until green LED starts
flashing. Release the button. The current setting is indicated by
the yellow LED:
L.O.: Yellow LED ON
D.O.: Yellow LED OFF
Press and release the button within ten seconds to toggle from
L.O. to D.O., the selection indicated by the yellow LED.
Thesensorretainsthe setting perthe lastbuttondepressionand
returns to the RUN mode ten seconds after the last button is
depressed.
t > 6 s
t < 0.5 s

3
• Auto PNP/NPN: both LEDs flashing
• Dedicated NPN: green LED flashing
• Dedicated PNP: yellow LED flashing
2. To change output type: Press and release the pushbutton
within ten seconds to select desired type. Each press of the
button will cycle to the next output setting. The type selected
is indicated by the LEDs. The sensor retains the setting per the
last button depression and returns to the RUN mode ten
seconds after the last button is pressed.
Pushbutton Lock/Unlock
The pushbutton or remote teach (RT) can be used to prevent
unauthorized users from changing teach settings.
To lock the pushbutton: press and release the button three
times within three seconds. Both LEDs flash synchronously for
three seconds indicating that the pushbutton is now locked.
To unlock the pushbutton: press and release the button three
times within three seconds. Both LEDs flash asynchronously for
three seconds indicating that the pushbutton is now unlocked.
Permanent Lock: The pushbutton may be permanently locked
by connecting the white wire (pin 2) to –V.
Remote Teach (RT)
The sensor can be taught remotely via the white wire (pin 2).
Connection to +V acts the same as the button being pressed and
no connection is the same as the button not being pressed. The
sensor can be taught by following the same teach/timing
sequence as used in the pushbutton teach. For example, connect
to the +V for more than three seconds to align and install the
reflector, disconnect from the +V; while the reflector is in the
sensor’s field of view and there is no target, connect to the +V for
less than one second to complete the teach process. All
pushbutton functions can also be carried out via RT.
Wiring Diagrams
The quick-disconnect connector is shown in the following
diagrams. The pin numbers correspond to male connectors on
the sensor.
Micro (M12) Male QD on Pigtail and
Integral Pico (M8) Male QD
Output Wiring
Normal operation: no connection.
Remote Teach: connect to +V. Refer to the Remote Teach section.
Pushbutton lock: connect to -V. Refer to the Pushbutton Lock/Unlock
section.
Approximate Dimensions [mm (in.)]
4
3
1
2
3
2
1
4
M12 Male M8 Male
Brown (1)
White (2)
Black (4)
Blue (3)
+V
Remote Teach/Lock 
Output (Auto NPN or PNP)
-V
LO
DO
12
(0.47)
M8 x 1
34
(1.34)
22.9
(0.90)
25.4
(1.0)
2.6
(0.10)
20
(0.79)
12
(0.47)
34
(1.34)
22.9
(0.90)
25.4
(1.0)
2.6
(0.10)
20
(0.79)
2.8
(0.11)
Clearance for
M3 or #4-40 screw
(2 places)
Clearance for
M3 or #4-40 screw
(2 places)

10000290639 Ver 01
December 2012
Printed in Germany
068-14493
Spot Size
* The spot size is square in shape with one side dimension per the graph.
Linear increase in spot size to 2 meters.
Accessories
Stainless Steel Mounting Brackets
60-BJS-L1
0 0.2
(0.66) 0.4 (1.31) 0.6 (1.97) 0.8 (2.62) 1.0 (3.28)
0
10
20
30
40
Size [mm]*
Distance [m (ft)]
12
(0.47)
18.6
(0.73)
33
(1.3)
14
(0.55)
24
(0.95)
8 (0.32)
15°
R 25.4
(R 1.0)
60-BJT-L2
Reflectors
92-118 Micro cube reflector
30°
20°
63.5
(2.5)
8
(0.32)
14
(0.55) R 25.4
(1.0)
12
(0.47)
18.6
(0.73)
33
(1.3)
10°
40.0
(1.58)
51.0
(2.01)
10 (0.39)
51.0 (2.01)
38.0 (1.50)
3.5
(0.14)
60.7
(2.39)
7.0
(0.28)
20 (0.79)