Install a 550 W Internal AC Power Supply

Before you begin

Some switches are shipped without installed power supplies. They accommodate one or two Summit 550 W AC power supply units.

Summit 550 W AC power supplies are available for switches with either front-to-back or back-to-front airflow.

An AC power cord is not included with the AC power supply. You can purchase AC power cords for use in the US and Canada from Extreme Networks or from your local supplier. The cord must meet the requirements listed in Power Cord Requirements for AC-Powered Switches and AC Power Supplies.

Before installing the power supply:

  • Verify that the switch rack or chassis has been grounded.
  • Verify that the airflow direction for the power supply is the same as the airflow direction of the installed fan modules in the switch.

About this task

When installing an AC power supply, be sure to observe the following precautions:



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.


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

To install a Summit 550 W power supply (AC power), follow these steps:


  1. Attach an ESD-preventive wrist strap to your bare wrist and connect the metal end to an appropriate ground point on the rack.
  2. If necessary, remove a blank panel from the rear of the switch.
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    Removing a Blank Panel
  3. Verify that the power supply is right side up.
    The power supply should be oriented as shown in Installing a Power Supply.
  4. Carefully slide the power supply all the way into the power supply bay.
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    Installing a Power Supply
  5. Push the power supply in until the latch snaps into place.


    Do not slam the power supply into the switch.
  6. To install a second power supply, repeat the procedure.


    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.
  7. Connect the AC power cord to the input connector on the power supply.


    Always be sure that the source outlet is properly grounded before plugging the AC power cord into the AC power supply.
  8. Connect power. See Connecting Power to the Switch.