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Install a Replacement 750 W DC Power Supply

To install a replacement 750 W DC power supply unit (PSU), follow these steps:

  1. Verify that the replacement power supply is oriented the same as the one you removed.
  2. Verify that the direction of ventilation airflow is the same for both the power supply and the switch.

    In a switch with front-to-back airflow, the fan modules are labeled Air Out.

    In a switch with back-to-front airflow, the fan modules are labeled Air In.

  3. Carefully slide the power supply all the way into the power supply bay.
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    Installing an 750 W DC Power Supply
  4. Push the power supply in until the latch snaps into place.
    Caution

    Caution

    Do not slam the power supply into the switch.
  5. Reconnect the ground wire as described in Connect the Ground Wire to an 750 W DC Power Supply.
121248-05 Rev. AH