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Install a 300 W or 750 W Internal AC Power Supply

About this task

To install a 300 W or 750 W AC power supply in a switch, follow these instructions.

Warning

Warning

To prevent an electrical hazard, make sure that the AC power cord is not connected to the power supply before you install the power supply in the power supply bay.

Caution

Caution

Make sure that the AC power supply circuit is not overloaded. Use proper over-current protection, such as a circuit-breaker, to prevent over-current conditions.

Procedure

  1. If necessary, remove a blank panel from the back of the switch (see the following figures).
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    Removing a Blank Panel (300 W Power Supply Unit)
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    Removing a Blank Panel (750 W Power Supply Unit)
  2. Verify that the power supply is right side up.
  3. Verify that the power supply's airflow direction (front-to-back or back-to-front) is compatible with the switch.
  4. Carefully slide the power supply all the way into the power supply bay (see the following figures).
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    Installing a 300 W AC Power Supply
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    Installing a 750 W AC Power Supply
  5. Push the power supply in until the latch snaps into place.
    Caution

    Caution

    Do not slam the power supply into the switch.

    Note

    Note

    If power supplies are not installed in both power supply bays, be sure to install a cover over the unoccupied bay. Unoccupied bays must always be covered to maintain proper system ventilation and EMI levels.

  6. Connect the AC power cord.
    For 300 W AC power supplies: connect the AC power cord to the input connector on the power supply and rotate the wire clip into place over the power cord connector.

    For 750 W AC power supplies:

    1. If necessary, slide the plastic cord retainer farther away from the back of the switch (see Moving the Power Cord Retainer).
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      Moving the Power Cord Retainer
    2. Connect the AC power cord to the input connector (see Connecting the Power Cord).
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      Connecting the Power Cord
    3. Open the clip and slip it over the barrel of the connector (see Attaching the Power Cord Retainer).
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      Attaching the Power Cord Retainer
    4. Snap the clip firmly around the connector.
  7. Connect the other end of the power cord to an AC power outlet.
    Warning

    Warning

    Always make sure that the source outlet is properly grounded before plugging the AC power cord into the AC power supply.

What to do next

To install a second power supply, repeat step 1 through step 7.

121248-05 Rev. AB