Summit X250E-48P Power Supplies; Internal Power Supply; External Power Supplies - Extreme Networks Summit X450a-24tDC Hardware Installation Manual

Summit Family Switches

Summit X250e-48p Power Supplies

The Summit X250e-48p switch is powered by both an internal power supply and an optional external
redundant power supply system.

Internal Power Supply

The internal Summit X250e-48p internal power supply is capable of 370 W of PoE power. It supplies
15.4 W to each port for a 24-port configuration and 7.7 W to each port for a 48-port configuration or any
combination of ports where total PoE power does not exceed 370 watts. If the total system demands
exceed this power limit, you can specify one of the following:
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
A full discussion of these concepts can be found in the ExtremeXOS 12.0 Concepts Guide, Power over Ethernet
section.

External Power Supplies

The EPS-600LS External Power Module provides optional redundant power for the Summit X250e-48p
switch. Through the redundant power input connector on the rear panel, the switch can be powered by
one, two, or three external power modules installed in the EPS-C External Power Supply Chassis.
The PoE capability of the Summit X250e-48p varies depending on the number of external power
modules in use.
the number of power supply modules in use.
Table 6: Number of External Power Modules and Corresponding PoE Behavior
Internal Power
Supply Status
Internal power
supply:
Power on
Internal power
supply:
Power Failure
For specifications and installation instructions for the external power module, see
Power Module" on page
32
Table 6 summarizes the PoE power behavior for the Summit X250e-48p switch based on
EPS-600LS (1x) EPS-600LS (2x)
370 W of 740 W of
redundant power external power only
Internal power supply
disabled
370 W of 740 W of
external power only external power only
58.
External PSU/Chassis
EPS-600LS (3x) Failed/Disconnected
740 W of 370 W of
external power only internal power only
with 2:1 redundancy
Internal power supply
disabled
740 W of No PoE power
external power only
with 2:1 redundancy
"EPS-600LS External
Summit Family Switches Hardware Installation Guide