Installation Guide

The following table lists the power capability in watts of the EPS-C2 based on the number of installed
PSUs. Check the power requirements of your switches to determine how many PSUs you need to install
into the EPS-C2 chassis.
12V Power (W) PoE Power (W)
1 PSU 300 380
2 PSUs 600 760
3 PSUs 900 1140
For technical specifications, see EPS-C2 Redundant Power Supply Technical Specifications on page
651.
EPS-C2 connectors
The EPS-C2 delivers power in the following ways.
2x7 connector
The 2x7 connector is compatible with ExtremeSwitching X440-G2 and X620 switches.The 2x7
connector is compatible with Summit X440 switches. Using the 2x7 connector, the EPS-C2 provides
redundant PoE power at the same level no matter how many PSUs are installed. That is, if there are one,
two, or three PSUs installed into the EPS-C2, the EPS-C2 will provide redundant PoE power capability at
the same 380-watt capacity as the internal power supply of the connected switches. The PoE power
supplied does not increase more than 380-watt even if additional PSUs are installed.
Internal-to-External Power Supply Transfer
When a EPS-C2 is connected to the switch and the internal power supply fails, power is drawn from the
EPS-C2 without power interruption to the switch or PoE connected devices.
External-to-Internal Power Supply Transfer
When a EPS-C2 is connected to the switch and the EPS-C2 fails or is disconnected, power is drawn from
the internal power supply without interruption to the switch or PoE connected devices.
2x9 connector
The 2x9 connector is compatible with the Summit X450e-48p or Summit X250e-48p switch. Unlike the
function on the 2x7 connector, the PoE capability of the EPS-C2 using the 2x9 connector for the
Summit X450e-48p or X250e-48p varies depending on the number of PSUs installed in the EPS-C2.
Power Supplies for Use with Your Switch
EPS-C2 Redundant Power System
Summit Family Hardware Installation Guide 173