Installing An Ru Alarm Cable - Huawei DBS3900 Installation Manual

RRU3260
Installation Guide
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9.8 Installing an RU Alarm Cable

This section describes the procedure for installing an RU alarm cable.
Procedure
Step 1 Use an M3 Phillips screwdriver to loosen the screws on the dustproof cap on the EXT_ALM
port and remove the dustproof cap.
Step 2 Connect the waterproof DB15 connector at one end of the RU alarm cable to the EXT_ALM
port on the RU, as shown in
Figure 9-19 Installing an RU alarm cable
Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB15
male connector to 0.4 N· m (3.54 lbf· in.).
Step 4 Connect the eight cord end terminals at the other end to external alarm devices.
Issue 05 (2014-06-30)
Route the cables according to the instructions in
cable ties to bind the cables.
Label the installed cables according to the instructions in Attaching an L-Shaped Label.
Install the waterproof DB15 male connector on the RU alarm cable with caution, preventing the pin
assignment from being damaged.
Use insulating adhesive tapes to wrap cord end terminals that are not in use and fix them at a proper
position based on the onsite situations. This prevents false alarm reporting and equipment damage due to
contact of exposed cables. Figure 9-20
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Figure 9-19.
shows the method for handling cord end terminals not in use.
9 Installing RU Cables
9.1 Cabling Requirements, and then use
98