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 LOAD1 and LOAD2 ports on the EPS, respectively.
Figure 6-79 Installing a BBU power cable
Step 3 Route the cable by referring to 6.5.1 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 into an RRU from the EPS subrack if an APM30H supplies
power to the RRU.
Prerequisite
l The tools, such as a Phillips screwdriver, cable cutter, and multi-purpose crimping tool, are
ready.
l The PGND cable is installed.
Context
Table 6-10 lists the specifications of an RRU power cable when an EPS subrack supplies power.
DBS3900 (Ver.B)
Installation Guide
6 Outdoor Scenario with AC Power Supply (BBU Installed
in an APM30H)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
88
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