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PSEN sl­1.0n 1.1/2.1/2.2
Operating Manual PSEN sl­1.0n 1.1/2.1/2.2
22174­EN­03
9
Function description
U
B
A1 A2
S31
12
22
Power supply
Power/Fault
&
&
Safety Gate
Lock
Receiver
Magnet
Actuator
There is a high signal at safety outputs 12 and 22 if the following occur simultaneously :
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The actuator is within the response range (safety gate closed) and
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Input S31 is high (control command for magnetic guard locking) and
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The holding force of the locking magnet has been tested successfully.
Safety outputs 12 and 22 are low if at least one of the following conditions are met:
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The actuator is outside the response range or
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Input S31 (control command for magnetic guard locking) is low or
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The holding force of the locking magnet has not been tested successfully.
Magnetic guard locking device and magnet monitoring
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The locking magnet is switched on if S31 (control command for magnetic guard locking)
is high and the actuator is detected (safety gate closed).
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The holding force of the locking magnet is tested on power­up.
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After S31 switches to low, wait at least 500 ms until S31 is switched back to high. Also
note the max. switching frequency (see
Technical details [ 22] ).
If an open winding or a winding short circuit is detected on a locking magnet that is
switched on, safety outputs 12 and 22 switch to a low state.
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For physical reasons, a remanence (residual magnetism) remains after the locking
magnet is switched off; this is dissipated the first time the sensor and actuator are sep­
arated.
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If the safety gate is in a locked condition and is opened by force, the safety outputs will
shut down.