The EPS-C2 delivers power in the following ways.
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.
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.
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.
Warning
The 2x9 cable is not hot-pluggable. Do not attach a powered EPS-C2 to any Summit switch using the 2x9 connector. See Installing an EPS-C2 Power Supply for installation instructions.| Switch Internal Power Supply Status | One installed 750 W PoE PSU | Two installed 750 W PoE PSU | Three installed 750 W PoE PSU | External Power Supply/Chassis Failed/Disconnected |
|---|---|---|---|---|
| Power On | 380 W of redundant power | 760
W of external power only Internal power supply disabled |
760
W of external power only with 2 + 1 redundancy Internal power supply disabled |
380 W of internal power only |
| Power Failure | 380 W of external power only | 760 W of external power only | 760 W of external power only with 2 + 1 redundancy | No PoE power |
A single 750 W PoE PSU provides redundant PoE power capability up to a 380-watt maximum capacity. This is sufficient to supply up to 15.4 watts per port for a 24-port configuration and up to 7.7 watts per port for a 48-port configuration.
If the internal power supply fails, the external power module will provide power to the switch and PoE devices at the same power levels as the internal power supply without any power interruptions.
If the 750 W PoE PSU fails or is removed, the internal power supply of the switch continues to provide PoE power without any power interruptions.
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.
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.
Each EPS-C2 power supply is shipped with a special redundant power supply cord.
