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    DC Power Supply LEDs in an EX9200 Switch

    A DC power supply has three LEDs on its faceplate: POWER OK, BRKR ON, and INPUT OK LEDs. The power supply status is also reflected in two LEDs on the craft interface. In addition, a power supply failure triggers the major alarm LED on the craft interface.

    Note: A host subsystem must be present for the POWER OK LED to be on.

    Table 1 describes the LEDs on a DC power supply in EX9200 switches.

    Table 1: DC Power Supply LEDs in EX9200 Switches

    LED

    Color

    Description

    POWER OK

    Green

    Power supply is functioning normally.

    Yellow

    The main output voltage is out of range.

    Off

    Power supply is not functioning normally. Check the INPUT OK LED for more information.

    BRKR ON

    Green

    DC power input is present and the DC power supply circuit breaker is turned on.

    Off

    DC power supply circuit breaker is turned off.

    INPUT OK

    Green

    DC input is present and is connected in correct polarity.

    Yellow

    DC input is present, but is not in valid operating range or connected in reverse polarity.

    Off

    DC input to the power supply is not present.

    Published: 2013-04-29