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RRU3269
Installation Guide
Figure 9-21 Installing an RRU alarm cable
Install the waterproof DB15 male connector on the RRU alarm cable with caution, preventing the pin
assignment from being damaged.
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 Draft B (2018-05-15)
Remove insulated protective tubes from the cord end terminals before connecting the cord end
terminals to devices, as shown in Figure 9-22.
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 9-23 shows the method for handling cord end terminals not
in use.
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9 Installing RRU Cables
110
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