Installation Instructions

1X UBS Macro B T S FRU P ower Distribution Unit (PDU)
The PDU contains the following:
• Internal DC input reverse polarity/over -voltage/surge protection, filtering, input/output
bus bars.
• Up to two DC input power cables/connectors for +27 V DC input to the rear of the PDU .
• PDU front panel with cutouts for integrated circuit breaker and +27 V DC output power
connectors. There are cutouts for the following circuit breakers/power connectors:
F our 90A circuit breakers/power connectors for XMI 1 through XMI 4.
Five 20A circuit breakers/power connectors for DMI 1 through DMI 5.
T wo 20A circuit breakers/power connectors for S SI 1 and S SI 2.
T wo 10A circuit breakers/power connectors for ACC 1 and ACC 2. Each ACC branch
circuit has three DC power connectors. Up to three accessories can share the 10A
branch circuit.
System impact/considerations
P erforming this replacement procedure will cause BTS downtime and interrupt all
call processing.
Prior to replacing the PDU , the UBS Macro BTS site signaling is shutdown (i.e., disable the BTS
site) then the UBS Macro BTS frame is powered down.
Table 9 -1 PDU R eplacement Conditions
FRU
Ref Designator What to Shutdown...
P ower Distribution
Unit (PDU)
PDU
Shutdown site signaling functions and then power
down the frame.
Required items
Documents
• 1X UBS Macro BTS Optimization/A TP manual.
68P09283A64 -3 9 -3
FOA SEP 2007