Pilz PSEN op4F-A-14-180/1 - Manual (Page 53)

OPERATING MANUAL PSEN op4F/H-A series
1003067-EN-02 53
7.8 Override
The override function allows the user to disable the safety functions if the machine needs to
be restarted, even though one or more of the light curtain beams have detected an object in
the protected field. For example, a typical application would be to examine recurring
blockages more precisely and to rectify the cause. These may be work materials between
the light curtain’s transmitter and receiver, which trigger the light curtain.
The override’s redundant inputs must be connected to a 24 VDC N/O contact and an earthed
N/O contact.
In accordance with the guidelines, the light curtain is equipped with two override activation
inputs: OVERRIDE1 and OVERRIDE2 (respectively, Pin 4 of the 12-pin M12 connector and
Pin 9 of the 12-pin M12 connector – of the receiver).
Fig. 49 – Override connection
The condition for the override is that the light curtain must be in a SAFE STATE and at least
one muting sensor must have been interrupted.
If this condition is met, the user interface shows “override call status”
and both the red LED
on the OSSDs and the LEDs for the alignment function flash.
OVERRIDE CALL
STATUS
As a result, the override request will only be accepted if the signals at the OVERRIDE X
inputs comply with the timings shown below.
The override function is ended automatically if any of the following conditions is present:
• All muting sensors are deactivated (with a T-muting configuration).
• All muting sensors are deactivated and no beams are interrupted (with an L-muting
configuration).
• The preset time limit has elapsed.
• The requirements for activation are no longer met (e.g. an override input is deactivated).