Service Manual

GSM-204-523
Replacing the internal batteries
31st Oct 01
Maint. 3–24
Maintenance Information: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W04-A
Replacing the internal batteries
Introduction to
internal battery
replacement
The internal backup battery tray is mounted in the lower right side of the PSU
cage, below the number 2 ac distribution box. Four 12 V batteries are mounted
on their sides in the battery tray, connected in series to provide –48 V dc.
It is usual to replace the battery tray, complete with Yuasa long life batteries as
an FRU item, although the batteries may be replaced separately, if required. Be
aware that if a different make of battery is fitted, however, the original cables
supplied may not fit and the cables may also have to be replaced.
NOTE
Power does not need to be removed from the cabinet to
replace the batteries. Use the circuit breaker switch on the
battery tray front panel to isolate the batteries from the
system prior to removal.
Figure 3-11 shows the battery tray, with the batteries installed.
BATTERY TRAY
RETAINING SCREWS
RETRACTABLE
HANDLE
CIRCUIT BREAKER
SWITCH
BATTERIES
BATTERIES
BATTERY RETAINING STRAPS
FRONT +VE
TERMINAL
4-WAY BATTERY SENSE
LEAD MOLEX CONNECTOR
BOTTOM BREAKER
TERMINAL
Figure 3-11 Internal batteries, mounted in the battery tray