Allen-Bradley Rockwell Automation VisiSight 42JT Installation Instructions Download Page 3

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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 push button for 12 

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:

• 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 push button 

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. 

Push Button Lock/Unlock

The push button or remote teach (RT) can be used to prevent 
unauthorized users from changing teach settings.

To lock the push button:

 press and release the button three 

times within three seconds. Both LEDs flash synchronously for 
three seconds indicating that the push button is now locked.

To unlock the push button: 

press and release the button three 

times within three seconds. Both LEDs flash asynchronously for 
three seconds indicating that the push button is now unlocked.

Permanent Lock: 

The push button 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 push button teach (e.g., connect to the 
+V for more than three seconds to teach the “target,” disconnect 
from the +V; remove the target and connect to the +V for less 
than one second to teach the “no target” condition. All push 
button functions can also be carried out via RT.

IO-Link

See instructions for IO-Link on 

www.ab.com

. Remote Teach (pin 2) 

is disabled in IO-Link operation. If output is selected as dedicated 
NPN, IO-Link communication is unavailable.

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

Transmitted Beam Receiver

Transmitted Beam Emitter

Normal operation

: no connection. (Disabled in IO-Link operation.)

Remote teach

: connect to +V. Refer to the Remote Teach section.

Push button lock

: connect to -V. Refer to the Push Button Lock/Unlock section.

For 

Normal operation

, white wire (pin 2) and black wire (pin 4) needs no connection. To disable light source, 

connect white wire (pin 2) to +V or disable light source via IO-Link.

Approximate Dimensions [mm (in.)]

4

3

1

2

3

2

1

4

M12 Male

M8 Male

Brown (1)

Black (4)

White (2)

Blue (3)

+V

Output Auto NPN/PNP or IO-Link

Remote Teach/Lock 

-V

+

-

Brown (1)

White (2)

Blue (3)

Test

Black (4)

IO-Link

V

V

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)

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