Rockwell Automation 1786-series ControlNet Coax Media Planning and Installation Guide - Manual (Page 11)

Publication CNET-IN002B-EN-P - June 2010 11
ControlNet Cable System Overview Chapter 1
Elements Comprising the
Coax Media System The ControlNet coax media system consists of components, such as the trunk,
drop cables, taps, cable connectors, terminating resistors, nodes, and repeaters
to create segments, links, and bridges for network communication.
For information on purchasing components, see the ControlNet Media
System Component List, publication
AG-PA002 .
Node
Nodes are the physical devices that require an address to function on the
ControlNet network. You can use ControlNet media system components,
such as repeaters, to extend your network for a maximum of 99 nodes on a
ControlNet network.
Tap
A tap connects each node via a drop cable on a network to the coax media
system. The taps are fixed at 1 meter in length, so each device is within
1 meter (3.28 ft) of the trunk cable.
Spare taps can be installed to add future devices. You
must put a
tap dummy load (catalog number 1786-TCAP) on each spare tap to prevent
noise in the system.
44985
TR TR T T T T
N N N N
Trunk Line
Drop Line
44986
TR TR T T T T
N N N N
Trunk Line
Drop Cable