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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-267CARR-POW (Carrier Port Power Unit) for DC-Powered Systems
10
Figure 10-20. Power Distribution Unit for DC-Powered Systems
(PDU8890CF-1)
Circuit Breakers
CB1-CB5 are
located on the
back of the PDU
Power Distribution Unit
Fans 3 Front
3 Back
644A
Carrier C
645B
644A
Carrier B
645B
644A
Carrier A
645B
S2 S3 S1
a
i
r
f
l
o
w
CB3 CB2
CB1 CB1
A
H
D
1
Filter
Filter
644A
Carrier D
645B
644A
Carrier E
645B
DC
Distribution
a
i
r
f
l
o
w
CB5 CB4
S3
Ring Generator
CB6
S4 S4