Service Manual

GSM-205-323
Horizonmacro indoor power supplies
31st Oct 01
Technical Description: Horizon macro indoor
68P02902W07-B
CONTROLLED INTRODUCTION
Tech. 4–1
Horizon macro indoor power supplies
Power supply
overview
The horizon macro indoor power supplies consist of the following elements:
 The power supply modules (PSM):
– +27 V dc PSM (negative earth input).
– –48/60 V dc PSM (positive earth input).
– 120/240 V ac (nominal) PSM.
 The hold-up battery module.
 The circuit breaker module (CBM).
 The BCU power supply module (BPSM).
Location of
power modules
Figure 4-1 shows the CBIA with the power modules indicated.
BPSMs
PSM or HOLD-UP
BATTERY
MODULE
CBM
Figure 4-1 Location of power modules