EPS4000 external power supply
In the event of an AC power loss or internal power supply device failure, the RUCKUS EPS4000 external power supply can be used as a 12 V, backup power source to a device when any of the DC power supply ports are connected to an ICX 7250 device. The EPS4000 requires a minimum of one RPS17 Power Supply Unit (PSU) to be functional. Proprietary DC cables are used to connect any of the EPS DC ports of the EPS4000 to the rear EPS4000 port of an ICX 7250 device that is supported by the EPS4000. Each RPS17 PSU can provide backup power to one ICX 7250 device. Even though a fully populated EPS4000 can monitor up to sixteen connected devices, the EPS4000 can provide backup power without performance degradation to only four ICX 7250 devices.
In case of a 54 V supply failure, the EPS4000 can provide power to multiple devices up to its capacity limit. You can set the system priority for the power budget allocation for this scenario. The default is for the lower-numbered port to have the higher priority. Should a higher priority device have a 54 V supply failure while a lower priority device is already being serviced by the PSU, the power supply will not switch to provide power to the higher priority device to maintain continuity of service. The EPS4000 uses the next PoE-power-budget cycle to reallocate power among the connected ICX 7250 devices.
In the PoE power extension mode, the EPS4000 can also provide additional power to support the PoE ports as needed. For more information about connecting an ICX 7250 device to the EPS4000, refer to Connecting devices to the external power supply.
Each RPS17 PSU can provide up to 740 W at 54 V and 120 W at 12 V. The RPS17 draws power from a standard AC source and converts it to DC for use by the switches.
RUCKUS recommends that you pay attention to the PoE or PoE+ port configuration of the device when connecting to an EPS4000. The internal power supply of each PoE or PoE+ device has a maximum number of supported PoE or PoE+ ports. RUCKUS recommends that when the EPS4000 is used as a redundant power source for the PoE device, that the maximum number of PoE or PoE+ ports of the external power supply must not exceed the maximum number of PoE or PoE+ ports of the internal power supply capability of each device.
The following devices are supported by the RUCKUS EPS4000: