Reset; Edm - Pilz PSEN sc L 3 Series Operating Manual

Function description
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.
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.
Operating Manual PSEN sc L 3/5 series
1005056-EN-01
OSSD
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