EPS-C2 connectors

The EPS-C2 delivers power in the following ways.

2x7 connector

The 2x7 connector is compatible with Summit X440 switches. Using the 2x7 connector, the EPS-C2 provides redundant PoE (Power over Ethernet) 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. The following table summarizes the PoE power provided using the 2x9 connector to a Summit X450e-48p or X250e-48p switch based on the number of installed PSUs.
Warning

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.
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Meaning of Switch Internal Power Supply Status Indicators

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

Single 750 W PoE PSU Configuration: Redundant 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.

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.

Each EPS-C2 power supply is shipped with a special redundant power supply cord.

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EPS-C2 2x7 Pin Redundant Power Cable
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