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PSEN opII4B Series
Automatic start and restart
Automatic start
When the safety light curtain is switched on the safety light curtain starts automatically and
the OSSDs switch to the ON state under the following conditions:
}
Both OSSDs are wired correctly and
}
No fault has occurred and
}
The protected field is clear.
If the protected field is violated, the OSSDs switch to the OFF state.
Automatic restart
The OSSDs automatically switch to the ON state during operation under the following con-
ditions:
}
both OSSDs are wired correctly and
}
no error has occurred and
}
the protected field is clear and
}
at least 80 ms have elapsed since the switch to the OFF state.
Fig.: Automatic start and restart timing diagram
Legend
[1]
[2]
[3]
[4]
Operating Manual PSEN opII4B Series
1005005-EN-02
POWER
OSSD
Free
Protected field
Interrupted
Safety light curtain is switched on
Check completed successfully, OSSDs in the ON state
Protected field broken
OSSDs in the OFF state
ON
OFF
ON
OFF
t
1
[1]
[2]
t
t
2
3
t
4
[3] [4]
[5]
[6]
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