Pilz PSEN op4B-S-3-080 - Manual (Page 26)

PSEN op4B Series Operating Manual
22
• The TEST/RESET input must be connected to the supply voltage
on the ESPE via a button with a N/C contact. The test should be
performed manually (by pressing the button) at least once a day in
order to check the proper operation of the safety device.
• If the safety light curtain is started and there is no TEST/RESET
input connected to 24Vcc, it will switch to a monitoring condition, in
which the OSSD is not activated. In this case, set up the correct
connections and restart the system to restore operation under
normal safety conditions.
• The TEST/START button must be positioned in such a way that
the operator has a clear view of the protected area when reset, test
or override procedures are in progress (see Ch. 6 “Operating
mode”).
• The input for monitoring external contactors (feedback loop) must
be connected to 24 Vcc via a N/C contact before the safety light
curtain is switched on.
The monitoring function will not be activated if the input is not
connected properly when the safety light curtain is switched on. In
this case the safety light curtain will change to a fault condition.
• The device is already fitted with internal voltage and current
limitation. We would advise against the use of other external
components, even where this is permitted.