Installation Guide

Dual 750 W PoE PSUs Configuration: Full Power
Two 750 W PoE PSUs provide full power at 760 watts; this power level allows 15.4 watts of PoE power
to all 48 ports. In this full-power configuration, the internal power supply is disabled, and therefore
redundant power is not available.
Triple 750 W PoE PSUs Configuration: Full Redundant Power
Three 750 W PoE PSUs provide the full 760 watts of power for 15.4 watts of PoE power to all 48 ports.
In addition, this configuration provides 2:1 redundancy. If one of the 750 W PoE PSU fails, the third
power module continues to provide uninterrupted full PoE power. The internal power supply of the
switch is disabled in this configuration.
For information on installing the EPS-C2, see Installing an EPS-C2 Power Supply on page 265.
Each EPS-C2 power supply is shipped with a special redundant power supply cord.
Figure 115: EPS-C2 2x7 Pin Redundant Power Cable
RPS-90 Redundant Power Supply
Tip
Extreme Redundant Power Supplies (RPS) do not support the ability for the RPS to be
connected to an operational switch. Connecting an RPS to an operational switch can have an
adverse eect on the switch. It is best practice that both the switch and the RPS be powered
down prior to cabling them together. Once the cabling is completed, turn on the RPS, then
turn on the switch.
The Extreme Networks RPS-90 (model 10948) is supported as a power source for the
ExtremeSwitching X440-G2-12t-10GE4 switch. It plugs into the RPS connector (coaxial barrel
connector) on the rear panel of the switch.
Note
Only the Extreme Networks RPS-90 RPS is supported for use with the X440-G2-12t-10GE4
switch. RPS-90 devices from other manufacturers are not supported.
The RPS-90 power supply has a C6-format AC power input connector. As a result, you will need to
obtain both a standard C13 AC power cord and a C5-to-C14 converter (Extreme Networks model
10947).
Note
The converter is not available in China. A special power cord is available for use with the
RPS-90 in China.
RPS-90 Redundant Power Supply Power Supplies for Use with Your Switch
124 ExtremeSwitching Hardware Installation Guide