Function description
Operating Manual PSEN sc L 3/5 series
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4.6
Reset
The Reset function can be used to set the safety laser scanner back to normal operation,
when the safety laser scanner has changed to an error state because of a non-critical error.
The reset pushbutton has to be connected to the reset input.
To trigger a reset, the reset pushbutton has to be pressed for at least 500 ms.
OSSD
Fig.: Timing diagram reset
4.7
EDM
Contactors outside the safety laser scanner 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 OSSDs changes
and so is used to monitor and detect malfunctions on the contactors. If a malfunction is de-
tected, the safety laser scanner switches
to a safe condition and stops the connected ma-
chine. This check is carried out each time the OSSDs are triggered and before restarting.
The EDM function is available:
}
Only when using the 12-pin connection
}
Only for the OSSD pairs 1 and 2.
