Service Manual

GSM-205-323
Hold-up battery module
31st Oct 01
Technical Description: Horizon macro indoor
68P02902W07-B
CONTROLLED INTRODUCTION
Tech. 4–5
Hold-up battery module
Introduction to
hold-up battery
module
The optional hold-up battery module provides short term backup power for one
ac powered Horizon
macro indoor BTS cabinet. The hold-up battery module is
fitted in the PSM shelf within the CBIA main cage, in any empty slot or in place
of the redundant PSM. It connects to the Horizon
macro indoor BTS through the
PSM slot backplane connector.
NOTE If the hold-up battery module is used in a Horizon macro
cabinet with more than three radios fitted, power supply
redundancy cannot be supported.
Under normal operating conditions the hold-up batteries provide ten seconds of
backup power (at 25 C) for a fully populated (six radio) Horizon
macro indoor
BTS cabinet.
NOTE Due to the discharge characteristics of the internal
batteries, hold-up duration is reduced at temperatures
below 25 C.
Figure 4-3 shows a view of the hold-up battery module, with LEDs identified.
ig.223.rh
FRONT PANEL
AIR VENTS ON
ENTIRE TOP AND
BOTTOM PANELS
GREEN LED
ACTIVE
RED LED
ALARM
OUTPUT
ENABLE SWITCH
M4 MODULE ATTACHMENT
SCREWS
GREEN LED
CHARGE
Figure 4-3 View of the hold-up battery module