6.4.1 Installing a BBU
This section describes the procedure and precautions to be taken for installing a BBU in an
APM30H, TMC11H, or 19-inch rack. A BBU occupies a space of 19 inch wide and 2 U high.
Context
In the triple mode scenario, two BBUs are required. A second BBU is installed in the same
manner as the first BBU.
Procedure
Step 1 Align mounting holes on the cable holders with mounting holes on both sides of a BBU, and
then use four M4 screws to secure the cable holes until the tightening torque reaches 1.2 N·m,
as shown in Figure 6-37.
Figure 6-37 Installing cable holders on a BBU
Step 2 Wear ESD gloves or ESD wrist strap, and then slide the BBU into the cabinet along the guide
rails using both hands.
Step 3 Tighten four M6x16 screws on the panel until the tightening torque reaches 3 N·m, as shown in
Figure 6-38.
Figure 6-38 Installing a BBU
----End
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.
52
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