Troubleshooting Guide; Typical Wiring Diagram - Allen-Bradley GuardShield 440L-T2KA series Installation Instructions Manual

GuardShield Type 2 Safety Light Curtain

Troubleshooting Guide

The light curtain conducts an internal self-test after startup. If an error occurs, an appropriate signal combination is sent through the status
indicators to the transmitter and receiver.
Condition
No.
6
Internal fault, receiver
Internal fault, transmitter
7
External fault
8
External fault (MPCE error)
The function Relay monitoring is activated and after clearing the OSSD the input Relay
9
monitoring does not recognize a change of state.

Typical Wiring Diagram

(GuardShield™ Type 2 with start/restart interlock and EDM and the OSSDs connected directly to contactors)
Machine
Test
Signal
Note: If MPCE/EDM is not used, the GuardShield™ Type 2 OSSDs is connected to a safety relay module, which is configured for EDM.
(1) Nonsafety auxiliary output can be connected to a lamp or a PLC.
10
Error Description
+ 24V DC
SENDER RECEIVER
Brown
S1
Test
Pink
Black
Blue
24V Ground
Rockwell Automation Publication 440L-IN011B-EN-P - October 2017
• Replace receiver
• Check connections transmitter/receiver
• Exchange transmitter
• Check connections of OSSD outputs for short circuit against +24V DC and GND (cable,
connected devices)
• Replace receiver
• Check connection for Relay monitoring
• Check connected relay for closed contact (if OSSD ON—input Relay monitoring must
have GND level, if OSSD OFF—input Relay monitoring must have +24V)
• Switch-on only after POWER OFF/ON
S2
Start/Restart
Brown
Red
Gray OSSD 1
K2
OSSD 2
K1
Yellow MPCE/EDM
White
Blue
Auxiliary
Green
Signal (1)
Action
L1 L2 L3
Bulletin 100S
Safety Contactors
or 700S Safety Relays
M