Function description
Operating Manual PSENmlock mini, PSEN mlm 1 sa 1.1/2.1/2.2
1005802-EN-02-Draft
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5.8.2 Operation with active use of Safety Diagnostics
} [1] The safety gate is closed and is securely locked. The hazardous machine function is
executed. Safety inputs S11/S21 signal that guard locking has been activated success-
fully on the preceding device in the series connection (high). Diagnostic input Y1 is activ-
ated (high), the auxiliary release is not operated (low).
} [2] Deactivation of guard locking is requested via safety inputs S31/S41 (high).
} [3] Gate guard locking can now be deactivated with an SDD command.
} [4] The safety gate is opened.
} [5] Guard locking is requested via safety inputs S31/S41 (low).
} [6] The safety gate is closed again and guard locking is activated automatically, the guard
locking signal switches to high.
} [7] As soon as guard locking is safely secured, safety outputs 12/22 are activated (high).
} [8] Execution of the hazardous machine function is once again permitted.
Guard locking
Actuator
Y1 (high)
S11/S21 (high)
Auxiliary release (low)
S31/S41
Y32
12/22
SDD
Fig.: Timing diagram: Operation with active use of Safety Device Diagnostics
Legend
[1] Execution of the hazardous machine function is permitted
[2] Deactivation of guard locking is requested (by safety controller)
[3] Guard locking is deactivated via SDD guard locking command (not safety-related)
[4] Safety gate open
[5] Safety gate guard locking requested (by safety controller)
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