Power Cabinet Internal Frus; Figure 1-8: Power Cabinet With Batteries Installed - Motorola SC 4812ET RF Hardware Installation Manual

Introduction
1
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Power Cabinet Internal FRUs

Figure 1-8: Power Cabinet with Batteries Installed (Doors Removed for Clarity)
located under
NOTE
Punch Block
is not visible
in this view.
28
Figure 1-8 shows the location of the Internal Field Replaceable Units.
The FRUs are described in the following paragraphs.
Batteries
(Battery
Heaters
batteries)
Batteries
The batteries provide a +24V DC backup to the RF Cabinet should AC
Power be lost. The Power Cabinet can accommodate a total of 24 12V
batteries, configured in 12 strings of 2 batteries each. The time duration
of backup provided depends on system configuration.
Battery Heater
The battery heaters provide heating to the batteries in the Power Cabinet.
A separate heater is required for each string of batteries. The heater is a
pad the batteries sit on located top of each battery shelf. The number of
heaters is dependent on system configuration.
SC 4812ET RF and Power Cabinet Hardware Installation Manual
TM
FRONT VIEW POWER CABINET
DRAFT
Rectifier
Alarm
Module
Temperature
Control
Module
Rectifier
Shelves
AC Outlet
Cover
DC
Circuit
Breakers
AC
Load
Center
FW00164
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Apr 2001
V02.03