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 7-37.
Figure 7-37 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 7-38.
Figure 7-38 Installing a BBU
----End
7.4.2 Installing an SLPU
To protect trunk signals, an SLPU must be configure, which is installed in the 1 U space below
the fan box on the top of the cabinet.
Procedure
Step 1 Install cable holders for an SLPU, as shown in Figure 7-39.
1. Remove the four bolts from the mounting ears of the SLPU.
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
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