Service Manual

GSM-204-323
DC power distribution
31st Oct 01
Technical Description: Horizon macro outdoor
68P02902W02-A
CONTROLLED INTRODUCTION
Tech. 4–9
DC power distribution
DC distribution
overview
The regulated dc output of the TOPSM is distributed through the multilayer
busbar to:
 The main cage PSMs.
 TMS fans.
 Customer specific equipment racking power outlets (COMMS 1 to 4).
 Internal battery backup.
 The connectors for optional external battery backup, (located on the dc
interface panel, within the top panel enclosure).
View of
dc power
components
Figure 4-9 shows the dc power distribution components and the associated
cables (shaded), with the cabinet structure omitted for clarity.
TMS FANS AND
CUSTOMER COMMS
SUPPLY CABLES
MULTILAYER
BUSBAR
BATTERY CONTACTOR
DC CIRCUIT BREAKER
PANEL
INTERNAL BATTERY TRAY
COMMS CONTACTOR
TMS FANS
CONNECTOR
CUSTOMER COMMS
SUPPLY CONNECTOR
Figure 4-9 DC power distribution components