the lower number 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 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
on page 49.
Each RPS17 PSU can provide up to 720 W at 54 Volts and 120 W at 12 Volts. The RPS17 draws
power from a standard AC source and converts it to DC for use by the switches.
NOTE
The internal power supply of the ICX 7250 devices is not a field-replaceable unit (FRU). The devices
must be shut down by administrators for replacement.
Brocade 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. Brocade 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 Brocade EPS4000:
• ICX 7250-24
• ICX 7250-24P
• ICX 7250-48
• ICX 7250-48P
NOTE
The ICX 7250-24G is not supported by the EPS4000.
Features and benefits
• Hosts up to four hot-swappable RPS17 power supply units (PSUs).
• Provides N:1 power redundancy at 12 V with each PSU.
• Each RPS17 can deliver a maximum of 720 W at 54 Volts and 120 W at 12 Volts.
• A fully populated EPS4000 has 8 DC power ports that can monitor up to 16 switches simultaneously
and provide 12-V redundant power to four switches.
• Provides power redundancy at 54 Volts and true extended PoE power support.
• 1:1 and 1:2 cables support 54 V or 12 V distribution up to 1 meter.
• Status LEDs are located on the front panel.
• Universal (100 - 240 V) AC line cord draws power from standard power outlet.
• The EPS4000 firmware is field-upgradeable.
• The power to the switches is maintained while the microcontroller unit (MCU) is being reset.
• The power distribution to the connected switches can be controlled per a priority scheme that you
set.
Front and rear panels
There are thirty two LEDs on the front panel of the EPS4000 to indicate the status for the DC power on
the 8 ports. Sixteen (Ex.x) are for the 54-V DC and the other sixteen (Rx.x) are for the 12-V DC
Features and benefits
36
Brocade ICX 7250 Switch Hardware Installation Guide
53-1003622-02