Rockwell Automation 1770 DH,DHII,DH485 CABLE - Manual (Page 94)

Constructing a DH II Cable System
Chapter 6
6-5
The cap helps prevent electrical noise. It also prevents contaminants from
getting into the tap. Store the unused dropline cable for future use.
After installing the taps, the next step is to prepare the trunkline segments for
installation. Refer to the next procedure for instructions.
There are two parts to preparing the trunkline cable for installation.
cut the cable
attach cables plugs to the trunkline
Cut the Cable
The trunkline is constructed of RG-11 type coaxial cable. When cutting the
cable segments, make them long enough to route from one tap to the next with
sufficient slack, so that the bend radius is not less than 6 inches (15.2 cm). See
Chapter 5 for more information about the trunkline bend limit.
Make sure that the cable segments are at least 30 feet (9.2 meters) long
between taps.
Attach the Cable Plugs to the Trunkline
After cutting the trunkline segments to the desired lengths, you must attach a
cable plug to each end of the segment. These plugs connect the trunkline
segment to the tap. To attach the cable plugs to trunkline segments, follow
these steps.
1. Slide the plug sleeve over the end of the cable segment.
2. Using a stripping tool, remove 0.7 inch (17.8 mm) of the insulating jacket
from the end of the cable segment, exposing the braid.
3. Using a stripping tool, remove 0.3 inch (7.6 mm) of braid from the end of
the cable segment. Remove 0.3 inch (7.6 mm) of the foil.
Prepare the Trunkline Cable
for Installation