Function description
Operating Manual PSENmlock mini, PSEN mlm 1 sa 1.1/2.1/2.2
1005802-EN-02-Draft
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5.3 Safety inputs S11 and S21 (series connection)
The safety switch has safety inputs S11 und S21, enabling additional safety switches to be
connected.
If safety input S11/S21 is switched off, safety output 12/22 is also switched off.
Safety outputs 12/22 are connected via safety inputs S11/S21, see Series
connection [
33].
5.4 Diagnostic output/signal output Y32
} Signal output/diagnostic output Y32 without SDD mode
– When the correct actuator has been detected (safety gate detected as closed), there
is a high signal at signal output/diagnostic output Y32.
} Signal output/diagnostic output Y32 with SDD mode
– If an SDD fieldbus module is used, the signal output/diagnostic output Y32 is activ-
ated for writing data.
5.5 Diagnostic input Y1
If an SDD fieldbus module is used, the diagnostic input Y1 is automatically activated and
data is read.
If no SDD fieldbus module is used, the diagnostic input Y1 must be connected to 24 V.
In a series connection, the signal output/diagnostic output Y32 must be connected to dia-
gnostic input Y1 on the next sensor in the series connection, see Series
connection [
33].
5.6 Activation of safety inputs S31 and S41 (solenoid operation)
Guard locking
} Guard locking on the safety switch is activated/deactivated via the safety inputs S31 and
S41.
} In the series connection, safety outputs 32/42 forward activation of the solenoid to the
next safety switch.
} Guard locking can only be activated when the actuator provided for the safety switch is
engaged (failsafe locking mechanism).
} Guard locking on the safety switch is based on a bistable, electromechanical prin-
ciple.
If the power supply is interrupted, the guard locking device maintains the last position it
had prior to the power interruption. This means:
– Guard locking remains deactivated, if it was deactivated prior to the power interrup-
tion
or
– Guard locking remains activated, if it was activated prior to the power interruption.
} Guard locking may only be deactivated by the higher level safety controller once the haz-
ardous machine movement has been completed.
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