PSEN op2H-SL Series
Operating Manual PSEN op2H-SL Series
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Manual restart
OSSD
t
1
On
Off
Light beams
Free
Interrupted
Start button
Operated
Not operated
Fig.: Timing diagram for manual restart
Legend
t
1
Operate the start button for 0.5 s to 5 s to trigger a manual restart
EDM
Contactors outside the safety light grid can be monitored (External Device Monitoring =
EDM, also known as feedback loop monitoring).
EDM only needs to be activated if the contactors are controlled directly.
A test is performed to see that the N/C contacts switch if the state of the OSSD changes
and so is used to monitor and detect malfunctions on the contactors. If a malfunction is de-
tected, the safety light grid switches to a safe state and stops the connected machine. This
check is carried out each time the OSSD is triggered and before restarting.
