Context
l In the triple mode scenario, two BBUs are required. A second BBU power cable is installed
in the same manner as the first BBU power cable.
l Table 7-6 lists the specifications for a BBU power cable when a DCDU-03B supplies
power.
Table 7-6 Specifications of a BBU power cable
Cable One End The Other End Descripti
on
BBU power
cable
RTN(+)
wire
3V3 power
connector
OT terminals bent by
90° (M4, 6 mm
2
)
Black
NEG(-)
wire
OT terminals bent by
90° (M4, 6 mm
2
)
Blue
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.
Procedure
Step 1 Add OT terminals to a BBU power cable. For details, see Assembling the OT Terminal and the
Power Cable.
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.
Step 2 Install the BBU power cable, as shown in Figure 7-67.
1. 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.
2. 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.
DBS3900 (Ver.B)
Installation Guide
7 Outdoor Scenario with DC Power Supply (BBU Installed
in a TMC11H)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
194
To Next Page
Loading...
Need help?
General
