Chapter 6 Operating Instructions
M4000 Adv., Adv. A/P, Area
48 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8010797/PA53/27-06-05
Electrical installation
6.4 External device monitoring (EDM)
The 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
connected to 24 V.
6.5 Reset button
In the protective operation mode with internal restart interlock (see page 21) the operator
must first press the reset button before restarting.
WARNING
Select the correct installation site for the reset button!
Install the reset button outside the hazardous area such that it cannot be operated from
inside the hazardous area. When operating the reset button, the operator must have full
visual command of the hazardous area.
Fig. 34: Connecting the
contact elements to the EDM
Notes
AUDIN - 7 bis rue de Tinqueux - 51100 Reims - France - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : info@audin.fr
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