Allen-Bradley Guardmaster, User Manual

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Rockwell Automation Publication 440R-UM013E-EN-P - March 2017 49
EMD Safety Relay Timing Functions Chapter 7
Case 2
8. The B1 signal turns on before the logic link signal.
9. The logic link signal turns on. The jog on-timer starts, and the safety
outputs turn on.
10. The B1 signal turns off before on-timer elapses. The safety outputs turn
off immediately and the off-timer starts.
11. The off-timer elapses. The logic link signal turns off to end Case 2.
Case 3
12. The logic link signal at terminal L12 is on. The B1 signal turns on. The
jog on-timer starts, and the safety outputs turn on.
13. The on-timer elapses and the safety outputs turn off. The off-timer
starts.
14. During the off-timer cycle, the B1 signal is turned off and then quickly
back on. The safety outputs remain off.
15. The B1 signal must turn off before a new jog cycle can begin.
TIP
The L12 and B1 signals are interchangeable. If the B1 signal remains on and
the L12 turns off before the on-timer elapses, the safety outputs turn off
immediately.
TIP The L12 and B1 signals are interchangeable. At least one of these two
signals must remain off throughout the off-timer cycle before a new jog
cycle begins.