Summit X450e-48p Power Supplies

Internal Power Supply

The Summit X450e-48p switch is powered by both an internal power supply and an optional external redundant power supply system.

The internal Summit X450e-48p power supply can provide 370 W of PoE power, as follows:
  • In a 24-port configuration, it provides 15.4 W to each port.
  • In 48-port configuration or any combination of ports where total PoE power does not exceed 370 watts, it provides 7.7 W to each port.
If the total system demands exceed this power limit, you can specify:
  • Port priorities to identify which ports should be ranked higher when allocating power.
  • Port disconnect precedence to specify the method of shutting off ports when not enough PoE power is available.
Note

Note

For a detailed discussion of these concepts, see the Power over Ethernet section in the ExtremeXOS 22.3 User Guide.

External Power Supplies

The Summit X450e-48p switch can be powered by one, two, or three external power modules through the redundant power input connector on the rear of the switch.

The EPS-C (External Power Supply Chassis) is shipped with the redundant power supply cable that connects to the redundant input connector on the rear of the switch. The EPS-C chassis can hold from one to three 600-Watt EPS-600LS external power module units.

The PoE capability of the Summit X450e-48p switch varies depending on the number of external power modules in use. The following table summarizes the PoE power behavior for the Summit X450e-48p switch based on the number of power supply modules in use.
Internal Power Supply Status EPS-600LS (1x) EPS-600LS (2x) EPS-600LS (3x) External Power Supply/Chassis Failed/Disconnected

Internal Power Supply:

Power On

370 W of

redundant power

740 W of

external power only

Internal power supply disabled

740 W of

external power only with 2:1 redundancy

Internal power supply disabled

370 W of

internal power only

Internal Power Supply:

Power Failure

370 W of

external power only

740 W of

external power only

740 W of

external power only with 2:1 redundancy

No PoE power

For more information, see EPS-600LS External Power Module.