Huawei DBS3900 Installation Manual page 398

DBS3900 (Ver.B)
Installation Guide
Procedure
Step 1 Add OT terminals to a BBU power cable. For details, see Assembling the OT Terminal and the
Power Cable.
Step 2 Install the BBU power cable, as shown in
1.
2.
Issue 06 (2011-09-15)
Table 11-4 Specifications of a BBU power cable
Cable
BBU power RTN(+)
cable wire
NEG(-)
wire
NOTE
The colors and structures of cables vary according to countries and areas. If the cables are purchased
locally, the colors and structures of the cables may be different.
NOTE
A 3V3 power connector is added to one end of a BBU power cable, and you only need to add OT terminals
to the other end onsite.
Link the 3V3 power connector at one end of the BBU power cable to the -48 V port on the
UPEU in the BBU, and then tighten the screw on the connector until the tightening torque
reaches 0.25 N·m.
Link the OT terminals on the blue and black wires at the other end to the wiring terminals
labeled NEG(-) and RTN(+) near the LOAD6 label on the DCDU-03B respectively.
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 11-16 Installing a BBU power cable
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
11 Indoor Scenario with DC Power Supply (BBU Installed
One End
3V3 power
connector
Figure 11-16.
The Other End
OT terminals bent by
2
90° (M4, 6 mm )
OT terminals bent by
2
90° (M4, 6 mm )
on a Wall)
Descripti
on
Black
Blue
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