Rockwell Automation 1770 DH,DHII,DH485 CABLE - Manual (Page 81)

Planning a DH II Cable System
Chapter 5
5-5
Droplines and Taps
Droplines connect individual nodes to the trunkline. They are two feet long and
connect directly to the node interface module. The catalog number is 1779-XP.
Important: The droplines on your DH II network must be 2 feet
(61 cm) in length.
Taps connect the droplines to the trunkline and are supplied with the droplines.
A trunkline segment must be at least 30 feet (9.2 meters) long between taps.
When you order a dropline and tap, you also receive two cable plugs. These
plugs are installed on the ends of trunkline segments and allow the segments to
plug into the tap.
Figure 5.3 shows the components of a tap.
Figure 5.3
Components of a tap.
Cable Plugs (2)
Body Pin Sleeve
Tap
Trunkline Jack
Mounting
Hole
Dropline Jack
Mounting
Hole
Cap
Straight Plug Right-angle Plug
Dropline Cable Assembly
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