Installing a 450 W or 550 W Internal DC Power Supply
Summit 450 W power supplies are compatible with Summit X480 series switches and with Summit X670 series switches that have front-to-back ventilation airflow.
Summit 550 W power supplies are compatible with Summit X670 and X770 series switches. They are available in versions for switches with either front-to-back or back-to-front airflow.

Note
You cannot combine power supplies of different wattages in the same switch.To install a Summit 450 W or 550 W DC power supply, refer to the following sections as needed:
- Make sure you have the tools and materials you need.
- Prepare the power cables and ground cable by attaching the provided connection lugs to the cables.
- Insert the power supply into the switch.
- Connect the ground wire.
- Connect the power supply to the electrical source and energize the DC circuit.