Pilz PSEN op4B-S-3-080 - Manual (Page 49)

Operating Manual PSEN op4B Series
45
6.8 Override function
This function can be used to activate the muting function when the
plant needs to be started even though there is an object within the
protected field. The aim is to clear the danger zone of any material that
may have accumulated due to a fault in the operating cycle.
Example:
There is a pallet within the protected field and the conveyor cannot be
switched on because the safety light curtain will not enable its outputs
(one or more of the beams are interrupted), so the accumulated
material cannot be transported away. Activating the override function
enables this type of intervention.
Activate the override function:
• With manual reset: When the protected field has been interrupted,
the override function cannot be activated until the TEST/RESET
button has been pressed.
• The override function is activated via the local input (OVR1 and
OVR2) on the receiver (RX). To do this, connect a pushbutton with
N/O contacts to OVR1 and 24 Vcc and PVR2 and 0 Vcc.
• The override function is active when both N/O contacts close
simultaneously (simultaneity between the contacts max. 400 ms).
• Press the OVERRIDE button and keep it held down until all the
accumulated material has been cleared away.
While the override function is active the muting lamp will flash to signal
the suspension of the safety light curtain.
The maximum duration of the override function is 120 s. After this time
the override function switches off, even if the “OVERRIDE” button is
operated. If the button is released before this time has elapsed, the
override function switches off immediately.