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Summit Family Switches Hardware Installation Guide
77
EPS-600LS External Power Module
The EPS-600LS External Power Module (Model 10913) is a 600-watt redundant power supply unit that
can be used with the following Extreme Networks switches:
● Summit X450e-48p switch
● Summit X250e-48p switch
NOTE
An AC power input cord is not provided with the EPS-600LS power module. You can order an appropriate cord from
Extreme Networks or from your local supplier. The power cord must meet the requirements listed in “Selecting
Power Supply Cords” on page 218.
Each EPS-C chassis is shipped with a special redundant power supply cord for connection to the Summit switch.
Make sure that the EPS-C chassis is installed in the equipment rack before installing an EPS-600LS power module.
PoE Redundant Power Configurations
You install one, two, or three EPS-600LS power modules in the EPS-C chassis (Model 10912) to build an
external redundant power system for the Summit switch. A redundant power cable shipped with the
EPS-C chassis provides the connection between the external power system and the redundant power
input connector on the back of the switch.
The PoE capability of the Summit X450e-48p or X250e-48p varies depending on the number of external
power modules in use. Table 17 summarizes the PoE power behavior for the Summit X450e-48p or
X250e-48p switch based on the number of power modules in use.
Single 600-LS Module Configuration: Redundant PoE Power
A single EPS-600LS power module provides redundant PoE power capability with the same 370-watt
capacity as the internal power supply. The internal Summit X450e-48p or X250e-48p power supply is
capable of 370 W of PoE power: 15.4 W supplied to each port for a 24-port configuration and 7.7 W
supplied to each port for a 48-port configuration.
● If the internal power supply fails, the external power module will provide power to PoE devices at
the same power levels as the internal power supply without any power interruptions.
● If the EPS-600LS power module fails or is removed, the internal power supply continues to provide
PoE power without any power interruptions.
Table 17: External Power Modules and Corresponding PoE Behavior
Internal PSU
Status
EPS-600LS (1x) EPS-600LS (2x) EPS-600LS (3x)
External PSU/Chassis
Failed/Disconnected
Internal PSU:
Power On
370 W of
redundant power
740 W of
external power only
Internal PSU disabled
740 W of
external power only
with 2 + 1 redundancy
Internal PSU disabled
370 W of
internal power only
Internal PSU:
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