Installation Guide

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
o ports when not enough PoE
power is available.
Note
For a detailed discussion of these concepts, see the Power over Ethernet section in the
ExtremeXOS 22.6 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 on page 170.
Summit X450e Series Switches
Summit Switches
100 Summit Family Hardware Installation Guide