Operating instructions Chapter 4
S3000
8009942/WK81/2012-11-28 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 47
Subject to change without notice
Configurable functions
4.6.1 External device monitoring (EDM)
The EDM checks if the contactors actually de-energize when the protective device is
tripped. If you activate external device monitoring, then the S3000 checks the contactors
after each interruption of the protective field and prior to the machine restart. The EDM
can so identify if one of the contactors has welded, for instance. In this case the external
device monitoring places the system in a safe operational state and the OSSDs are not
s
witched back to the ON state.
The table shows how the S3000 reacts if the external device monitoring detects a
contactor malfunction:
Without internal restart
interlock
or
with restart delay
The system locks completely (lock-out).
The error message appears in the 7<segment display.
With restart interlock The S3000 switches its OSSDs to the OFF state.
The LED
is illuminated.
The error message appears in the 7<segment display.
You can configure the external device monitoring in the CDS.
You will find examples on the connection of the external device monitoring in section 7.5
“Connection diagrams” on page 111.
If you do not use the external device monitoring function, leave this input disconnected
(see section 6.1.1 “Pin assignments of the I/O modules” on page 97).
S3000 on a contactor
malfunction
Notes
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