HP Surestore 64 Planning Guide - Page 35

Power Supply, RFI Shield, Power Module Assembly

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Power Supply Redundant, load-sharing power supplies step down and rectify facility input power to provide 48-volt direct current (VDC) power to director FRUs. The power supplies also provide overvoltage and overcurrent protection. Either power supply can be replaced while the director is powered on and operational. Each power supply has a separate backplane connection to allow for different AC power sources. The power supplies are input rated at 85 to 264 volts alternating current (VAC). The faceplate of each power supply provides the following status LEDs: • A green PWR OK LED illuminates if the power supply is operational and receiving AC power. • An amber FAULT LED illuminates if the power supply fails. • An amber TEMP LED illuminates if the power supply shuts down due to an over temperature condition. • An amber I LIM LED illuminates if the power supply is overloaded and operating at the current limit (15.6 amperes). RFI Shield The RFI shield covers and provides RFI protection for all rear- access FRUs except the power module assembly. The RFI shield is concurrent and can be removed or replaced while the director is powered on and operating. Power Module Assembly The power module assembly is located at the bottom rear of the director. The module is a nonconcurrent FRU, and the director must be powered off prior to scheduled removal and replacement. The module provides: • Two single-phase AC power connectors. Each connector is input rated at 85 to 264 VAC. • A power switch (circuit breaker) that controls AC power distribution to both power supplies. The breaker is set manually, or is automatically tripped by internal software if thermal sensors indicate the director is overheated. Director Description 21 Director Hardware Description

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Director Description
21
Director Hardware
Description
Power Supply
Redundant, load-sharing power supplies step down and rectify facility input power to
provide 48-volt direct current (VDC) power to director FRUs. The power supplies also
provide overvoltage and overcurrent protection. Either power supply can be replaced
while the director is powered on and operational.
Each power supply has a separate backplane connection to allow for different AC power
sources. The power supplies are input rated at 85 to 264 volts alternating current (VAC).
The faceplate of each power supply provides the following status LEDs:
•
A green PWR OK LED illuminates if the power supply is operational and receiving AC
power.
•
An amber FAULT LED illuminates if the power supply fails.
•
An amber TEMP LED illuminates if the power supply shuts down due to an over
temperature condition.
•
An amber I LIM LED illuminates if the power supply is overloaded and operating at the
current limit (15.6 amperes).
RFI Shield
The RFI shield covers and provides RFI protection for all rear- access FRUs except the
power module assembly. The RFI shield is concurrent and can be removed or replaced
while the director is powered on and operating.
Power Module Assembly
The power module assembly is located at the bottom rear of the director. The module is a
nonconcurrent FRU, and the director must be powered off prior to scheduled removal and
replacement. The module provides:
•
Two single-phase AC power connectors. Each connector is input rated at 85 to 264 VAC.
•
A power switch (circuit breaker) that controls AC power distribution to both power
supplies. The breaker is set manually, or is automatically tripped by internal software if
thermal sensors indicate the director is overheated.