Chapter 8 Operating Instructions
M4000 Adv., Adv. A/P, Area
86 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8010797/YT72/2016-02-19
Subject to change without notice
Electrical installation
8.4 External device monitoring (EDM)
T
he external device monitoring (EDM) checks if the contactors actually de-energize when
the protective device responds. If, after an attempted reset, the EDM does not detect a
response from the switched devices within 300 ms, the EDM will deactivate the output
signal switching devices again.
You must implement the external device monitoring electrically by the positively guided
closing action of both N/C contacts (k1, k2) when the contact elements (K1, K2) reach
their de-energized position after the protective device has responded. 24 V is then applied
at the input of the EDM. If 24 V is not present after the response of the protective device,
then one of the contact elements is faulty and the external device monitoring prevents the
machine starting up again.
If you connect the contact elements to be monitored to the EDM input, then you must
activate the option EDM in the CDS (Configuration & Diagnostic Software). If not, the
device will show the error .
If you later deselect the EDM option, pin 6 of the system plug must not remain connec-
ted to 24 V.
Fig. 55: Connecting the
contact elements to the EDM
Notes
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