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Operating Instructions
L4000 system
Fig. 17: Connection of the
contact elements to the
EDM
Notes
8010009/1KO6/2023-08-16
Subject to change without notice
Electrical installation
5.2
External device monitoring (EDM)
The EDM checks if the contactors (or other switching devices) actually
de-energise when the protective device responds. If, after an
attempted reset, the EDM does not detect a response from the
switched device within 420 ms, the EDM will deactivate the OSSD
switching outputs again.
You must implement the EDM electrically by the positive closing
action of both N/C contacts (k1, k2) when the contact elements (K1,
K2) reach their de-energised position due to the interruption of the
light path. 24 V is then applied at the input of the EDM. If 24 V is not
applied after a light path interruption, one of the contact elements is
defective and the EDM prevents the machine restart. The EDM
function is active in the status as delivered.
The EDM remains active after switching the device off and back on
again.
To deactivate the EDM, connect pin 3 and 10 on the safety
evaluation device UE401 to 24 V.
SICK AG • Industrial Safety • Germany • All rights reserved
DC 24 V
en
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