Pilz PSEN ml b 1.1 - Page 16

Function description
Operating Manual PSEN ml b 1.1/2.1/2.2
1003884-EN-12
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} Operation with active use of the Safety Device Diagnostics
– Activate/deactivate the guard locking by a combination of a Safety Device Diagnostics
command and the status of the safety inputs S31 and S41 (S31 and S41 must have a
high signal).
The safety requirements are guaranteed by the signals S31 and S41 (the fieldbus for
Safety Device Diagnostics communication is not safe).
} Operation with specified direction when activating/deactivating guard locking
A specified direction can be used to control switching of the guard locking status.
– Toggle: The safety switch changes the guard locking status (activated <-> deactiv-
ated) each time S31 and S41 are activated simultaneously.
– Force direction: The safety switch is selectively activated or deactivated by offset ac-
tivation of the rising edges at S31 and S41.
Timing diagrams
[7]
S31 + S41
Y32
12 + 22
[1] [4]
[5]
[8]
[t1]
[t1]
[t2]
[6]
[t2]
Y1
[2] [3]
SDD command guard locking
Guard locking
Actuator
Fig.: Active use of Safety Device Diagnostics
Legend
[1] Gate is open
[2] Gate is closed
[3] Guard locking is activated by the safety control system
[4] Guard locking is activated
[5] Execution of the hazardous machine function is permitted
[6] Outputs will be deactivated
[7] Guard locking will be deactivated
[8] Gate is open
[t1] Processing time of guard locking signal = 100 ms