Procedure
Step 1 Remove bolts from the filler panels on slots 2 and 3, and then remove the filler panels.
Step 2 Install the USLP2s in slots and 3, and then tighten the screws on both sides of the panels until
the tightening torque reaches 0.6 N·m, as shown in Figure 14-33.
Figure 14-33 Installing USLP2s
----End
14.4.2 Installing an SLPU
To protect monitoring signals, an SLPU may be configured, which is installed the 1 U space
directly under the EPS.
Prerequisite
The tools, such as a screwdriver and a pair of ESD gloves, are available.
Context
The SLPU that is used to protect monitoring signals is configured with two Universal Signal
Lightning Protection units-type 2 (USLP2s). Figure 14-34 shows the panel of a USLP2.
Figure 14-34 Panel of a USLP2
Figure 14-35 shows the mapping relationship between the pins in the input and output ports on
the USLP2.
DBS3900 (Ver.B)
Installation Guide
14 Indoor Scenario with DC Power Supply (BBU Installed
Indoors and RRU Powered Outdoors)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
523
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