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    The Micrologic Trip Unit screen displays the message "Comms not available" when trying to set Com Parameters.

    Issue:
    When trying to set up communications parameters on the Micrologic trip unit, the message on the trip unit screen shows "Comms not available".

    Product Line:
    Circuit Breakers

    Environment:
    Applies to Micrologic Trip Unit models 3.0A, 5.0A, 5.0P, 5.0H, 6.0A, 6.0P, 6.0H

    Cause:
    For some reason, the communication parameters cannot be set up in the Micrologic Trip Unit.

    Resolution:
    When setting up the Com Parameters using the Micrologic Trip Unit screen, if the trip unit screen displays the message "Comms not available", it may be caused by one of the following:
    -The BCM is not installed (Breaker Communications Module)
    -The BCM is not powered (it requires 24Vd on terminals E1+ and E2-)
    -The polarity of the 24Vdc power supply is reversed (it should be positive on E1, negative on E2)
    -The BCM is damaged
    -The BCM and the Trip Unit communicate through an optical port. Check for foreign material blocking the optical port.
    If the above check OK, then contact us for technical support.

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