Rockwell Automation 1797-Series ControlNet Ex Media Plannng Installation Manual - Manual (Page 15)

Publication CNET-IN003A-EN-P - January 2006
Overview of the ControlNet Ex Media System 1-7
Tap Terminator
A tap terminator (cat. no. 1797-TCAP) is available to terminate unused
taps.
Segments
A segment is a collection of coax trunk cable sections, taps, and two
terminators.
The total allowable length of a segment depends upon the number of
taps in your segment and the coax cable type used.
See page 2-1 for detailed information.
Fiber Repeater Hubs
You can use fiber as the connector from your safe area to your
hazardous area. Use fiber repeaters to connect the coax cable to the
fiber. Fiber repeater hubs increase the number of taps, extend the total
length of your segment, or create a star configuration (go off in
multiple directions from one point). The number of fiber repeater
ATTENTION
Use only intrinsically-safe tap terminators in a
ControlNet Ex media system. Intrinsically-safe tap
terminators are marked “CNet Tap Trm.”
T
N
Segment
Trunk Cable
1797-TCAP
N N
T T T
40959
40959
Trunk Cable
Segment
T T T T
N N N N