Rockwell Automation 1000 Safety Lockout System - Manual (Page 28)

Publication 1000-UM001B-US-P - July 2000
5-4 Troubleshooting Guide
10. One at a time, check operation of SLS switches by turning to OFF
position, and check for the following:
a. SAFE light on.
b. IC dropped out.
c. 1CR dropped out.
d. Safety relay SR dropped out
e. VSR indicates safe condition.
11. VSR voltage sensing broken wire detection test.
a. With power off, remove one voltage-sensing wire from the VSR.
Then, with all SLS switches in the ON position, apply power and
turn a SLS switch off. The result should be that the safe light does
not illuminate (after cycling an SLS switch) and the system fault LED
is on. The VSR voltage hazard LED will now turn on. Turn power
off, reconnect voltage sensing wire and repeat check with the VSR
redundant voltage sensing circuit.
b. Each separately, do the same test with the two N* circuits. (No initial
fault on VSR, only when the SLS switch is turned to off does the
system fault light come on.)
12. Safety relay cable shorting checks
a. With all power off, install a shorting jumper on Allen-Bradley safety
relay 700-ZBL between terminals S10 and S11. Then power up the
system with all SLS switches in the ON position. Turn a SLS switch
to the OFF position. The SAFE light should not come on. Observe
that CH2 and K1 LEDs are off on the safety relay. Turn off all power
and remove shorting jumper.
b. With all power off, install a shorting jumper on Allen-Bradley safety
relay 700-ZBL between terminals S21 and B2. Then power up the
system with all SLS switches in the ON position. Turn a SLS switch
to the OFF position. The SAFE light should not come on. Observe
that CH1 and K2 LEDs are off on safety relay. Turn off all power
and remove shorting jumper.