NOTE
A BBU power cable must be connected to each UPEU if two UPEUs are installed in the BBU. The
3V3 power connector at one end of each BBU power cable is connected to the –48V port on each
UPEU in the BBU, and the easy power receptacle (pressfit type) connectors at the other end are
connected to the LOAD6 and LOAD7 ports on the DCDU-03B, respectively.
Figure 12-13 Installing a BBU power cable
Step 3 Route the cable by referring to 12.4.1 Cabling Requirements, and then use cable ties to bind
the cable.
Step 4 Label the installed cables. For details, see Attaching an L-Shaped Label.
----End
Installing an RRU Power Cable
An RRU power cable feeds power to an RRU from a DCDU-03B when the DCDU-03B is
configured.
Context
Table 12-5 lists the specifications of RRU power cables when a DCDU-03B supplies power.
Table 12-5 Specifications of RRU power cables
Cable
One End The Other End Remarks
RRU power
cable
RTN(+)
wire
OT terminals bent by
90° [M4, 3.3 mm
2
(12
AWG)]
OT terminal [M4, 3.3
mm
2
(12 AWG)]
North
American
standard
Black
NEG(-)
wire
OT terminals bent by
90° [M4, 3.3 mm
2
(12
AWG)]
OT terminal [M4, 3.3
mm
2
(12 AWG)]
North
American
standard
Blue
DBS3900 (Ver.B)
Installation Guide
12 Indoor Scenario with DC Power Supply (BBU Installed in
a 19-Inch Rack)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
417
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