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DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-375CARR-POW (Carrier Power Supply)
9
Uninterruptible Power Supply
An external UPS provides a longer backup time than holdover batteries and can
replace the batteries and battery charger. The unit connects from the AC power
source to a cabinet’s AC power cord. If AC power fails, the unit supplies its own
AC power to the cabinet.
J58890CH-1
In AC powered cabinets, the power distribution unit (J58890CH-1), distributes
170 to 264 VAC from a wall outlet to a set of BU3200A Battery Interface Units
(BIU). See Figure 9-20
and Figure 9-21.
Figure 9-20. AC Power Distribution Unit (J58890CH-1) Front
Circuit
Breakers
Rectifier
Modules
Ring
Generator
Ring Generator
Fuse
Battery
Interface
Unit
j58890ch RBP 071596