Extreme Networks Summit X150 Series Hardware Installation Manual page 87

Figure 89: Summit X450e-48p Switch Rear Panel
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
For a detailed discussion of these concepts, see the Power over Ethernet section in the
ExtremeXOS Concepts 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.
Summit Family Hardware Installation Guide
Summit Family Switches
87