PSEN opII4B Series
Operating Manual PSEN opII4B Series
1005005-EN-02
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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.
[1]
[2]
[3] [4]
[5]
POWER
OSSD
2
3
4
[6]
t
1
t
t
t
Interrupted
Free
Protected field
OFF
ON
ON
OFF
Fig.: Automatic start and restart timing diagram
Legend
[1]
Safety light curtain is switched on
[2]
Check completed successfully, OSSDs in the ON state
[3]
Protected field broken
[4]
OSSDs in the OFF state