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Chapter 1 21
Addendum to D Class Enterprise Servers System Installation Guide
DC Power Supply
DC Power Supply
The HP 9000 Series 800t D Class Server contains a NEBS-compatible
direct current (DC) power supply, rather than the alternating current
(AC) power supply furnished with the standard HP 9000 D Class
computer. This switching power supply is designed to work on DC by
replacing the AC input module with a DC-to-DC converter module.
This DC power supply directly replaces the standard AC supply for the
purpose of operating this computer from a telephone central office
negative 48 volt battery or negative 60 volt battery input.
WARNING A shock hazard exists! Do not attempt to power-up the power
supply system o utside the computer system chassis. The power
supply requires a load and other enabling signals to operate
properly.
This DC power option provides a D Class computer server compatible to
NEBS requirements for operation in a Central Office environment where
equipment is powered from 48VDC bat teries.
The power supply also provides alarm outputs in the form of relay
contact closures to indicate a power supply failure. An additional feature
provides a remote control input, which can be used to turn off the power
supply for the purposes of resetting the computer system.
Connections
The DC Power Supply comes with a 9-pin Universal Mate-N-Lock
connector for power, alarm, and control circuits. A mating 9-pin plug
with a 15-foot cable is supplied with the unit. The other end of the cable
isbarewiretobeconnectedtothebatteryplantonthesite.
CAUTION The power wire assembly has been evaluated for use as internal wire
only and therefore needs to be installed in a cabinet for the system to
retain its safety regulatory markings.