Extreme Networks BlackDiamond 8800 Series - External Psus; Internal PSU; Summit X450 E-48 P Power Supplies

Summit X450e Series Switches
Extreme Networks Consolidated ExtremeXOS Hardware Installation Guide
275
Summit X450e-48p Power Supplies
Internal PSU. The internal Summit X450e-48p PSU 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 or
any combination of ports where total PoE power does not exceed 370 watts. If the total system demands
exceed this power limit, the user may 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
A full discussion of these concepts may be found in the ExtremeXOS 12.0 Concepts Guide, Power over Ethernet
section.
External PSUs. The Summit X450e-48p switch may 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. Table 30 summarizes the PoE power behavior for the Summit X450e-48p switch based
on the number of power supply modules in use.
For complete details, see “EPS-600LS External Power Module” on page 328.
Table 30: Number of external PSUs 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