Configuration - Motorola SC 4812ET RF Hardware Installation Manual

SC 4812ET to SC 4812ET DC Power Sharing and Frame Installation
– continued

Configuration

F
Figure F-1: SC4812ET to SC 4812ET Base Station DC Power Sharing
170
The SC 4812ET Power Cabinet consists of a rectifier system with up to
six (6) 27 Volt DC, 70 Amp modules, depending on the number of
carriers it is required to support in the SC 4812ET RF Cabinet.
Connections to the SC 4812ET are made via six (6) #2/0 AWG superflex
(three red and three black) cables, to allow redundancy on the DC
connections, and to minimize voltage drop. Please note that when two
RF Cabinets are connected to one Power Cabinet, the redundancy of the
connections must be sacrificed, the effects to voltage drop and cabinet
spacing are shown in Figure F-1.
Up to 12 battery strings can be provided in the Power Cabinet to support
up to four (4) hours of battery backup in a fully equipped SC 4812ET
RF cabinet.
For the purpose of connecting two (2) RF Cabinets to the Power
Cabinet, it is necessary to only use four (4) #2/0 AWG superflex (two
red and two black) cables to connect to the 2–carrier RF Cabinets, and
two (2) #2/0 AWG superflex (one red and one black) cables to connect to
the 1–carrier RF Cabinet.
Rear of SC 4812ET
RF Cabinet
(2 carrier Max)
2 Individual
Connection
Cables
SC 4812ET RF and Power Cabinet Hardware Installation Manual
TM
Rear of SC 4812ET
Power Cabinet
208–240
3 x 28V
DC Outputs
(1 carrier Max)
Rear of SC 4812ET
Battery Backup
RF Cabinet
Interface
DRAFT
VAC
FW00149
Apr 2001
V0F.02