Removing a 450 W or 550 W DC Power Supply

To remove an installed 450 W or 550 W DC power supply, follow these steps:
Caution

Caution

The DC power supply may be hot to the touch; use thermal protective gloves when handling the power supply during removal.
  1. De-energize the DC circuit.
  2. Disconnect the DC power cables:
    1. Pull the cover off the terminal block.
    2. Loosen the screws that secure the cable terminals to the terminal block.
    3. Slide the wires out from under the captive washers.
      Warning

      Warning

      Be sure to disconnect all power cables before you disconnect the chassis ground wire.
  3. Disconnect the ground wire as follows:
    1. Loosen the screw that secures the ground wire to the terminal block.
    2. Slide the wire out from under the captive washer.
  4. Note the orientation of the installed power supply.
  5. For a Summit X670 series switch, note the direction of ventilation airflow, and verify that the power supply airflow direction is the same as that of 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.

  6. Push the latching tab toward the power supply handle and pull outward on the handle to disengage the power supply internal connectors.
    See Removing a Summit 450 W or 550 W Power Supply.
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    Removing a Summit 450 W or 550 W Power Supply
  7. Carefully slide the power supply the rest of the way out of the switch.
  8. If a replacement power supply will not be installed, install a cover over the unoccupied power supply bay.
    Note

    Note

    Unoccupied power supply bays must always be covered to maintain proper system ventilation and EMI levels.
121141-04 Rev. AB