Brocade Communications Systems ICX 7250, Руководство по установке оборудования

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Installing the EPS4000
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EPS4000 external power supply............................................................................................................................................................................63
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Items included with the EPS4000..........................................................................................................................................................................67
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Configuration requirements.........................................................................................................................................................................................67
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Summary of installation tasks.....................................................................................................................................................................................67
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Installation precautions...................................................................................................................................................................................................68
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Preparing the installation site......................................................................................................................................................................................69
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Installing the device..........................................................................................................................................................................................................69
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Installing an RPS17 PSU................................................................................................................................................................................................ 72
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Uninstalling an RPS17 PSU..........................................................................................................................................................................................73
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Connecting the EPS4000 cord................................................................................................................................................................................74
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Powering on the system................................................................................................................................................................................................ 76
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Verifying proper operation.............................................................................................................................................................................................77
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EPS4000 external power supply technical specifications.........................................................................................................................77
DANGER
The procedures in this manual are for qualified service personnel.
DANGER
Before beginning the installation, see the precautions in “Power precautions.”
DANGER
Be careful not to accidently insert your fingers into the fan tray while removing it from the chassis. The fan may still be spinning
at a high speed.
EPS4000 external power supply
In the event of an AC power loss or internal power supply device failure, the Brocade 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.
NOTE
The primary source of 12 V power for an ICX 7250 device is the internal power supply. The EPS4000 is designed to serve
primarily as a backup source of 12 V power. You should service a failed ICX 7250 device as soon as possible after a 12 V power
failure is detected.
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 on page
77.
Brocade ICX 7250 Switch Hardware Installation Guide
53-1003898-02 63