Operating The Device; Function Messages; Test Function; Behavior In Case Of Disturbance - Eaton CMD24VDC Handbuch

4 Operating the device

4.1 Function messages

4 Operating the device
4.1 Function messages

4.2 Test function

4.3 Behavior in case of disturbance

34
The CMD contactor monitoring device is fitted with two internal LEDs for
status indication at the device.
①
②
Figure 5: LED indication
a A green LED labelled "Contr." (Control)
The "Contr." LED indicates the control for the CMD and the contactor.
b A green UVR (Undervoltage Release) LED
The UVR LED indicates the state of the power supply to the undervoltage release.
If the LED is off, the circuit-breaker has been tripped by the undervoltage release.
The control system must be tested regularly during operation via the Test
button. An annual test is sufficient. The test determines the reliable
operation of the undervoltage release. The test button must be provided with
another NO contact in addition to the NC contact for the actual test.
This contact signals the test to a PLC which then indicate the next text
interval.
￫
The test should be carried out in no-load conditions.
If the CMD features a failure or defect, it has to be replaced.
CMD(24VDC), CMDTD 01/20 MN121001ZU-DE/EN www.eaton.com