Huawei BBU3900, Hardware Description

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Figure 4-2 BBU power cable (1)
(1) 3V3 connector
(2) OT terminal (6 mm
2
, M4)
NOTE
There are two wires in the -48 V power cable with a blue wire and a black wire. The +24 V power cable
and the -48 V power cable have the same exterior, but they differ in color. The +24 V power cable has a
red wire and a black wire.
When the power supply device is the EPS, the BBU power cable has a 3V3 connector at one
end and an easy power receptacle (pressfit type) connector at the other end.
Figure 4-3 shows
the BBU power cable.
Figure 4-3 BBU power cable (2)
(1) Easy power receptacle (pressfit type) connector (2) 3V3 power connector
Pin Assignment
The power cable is a 2-wire cable. Table 4-2 and Table 4-3 describe the pin assignment for the
wires of the power cable.
Table 4-2 Pin assignment for the wires of the -48 V power cable
Pin on the 3V3
Connector Color Description
A1 Blue -48 V
A2 - -
A3 Black GND
4 BBU3900 Cables
BBU3900
Hardware Description
4-6 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 11 (2010-11-10)