Installation Guide User Manual

14 Publication CNET-IN002B-EN-P - June 2010
Chapter 1 ControlNet Cable System Overview
Repeater
When you insert a repeater into the cable system, a new segment is created.
The same restrictions on the number of taps and cable length apply to this new
segment, as explained on page 13
.
ControlNet repeaters are connected to a repeater adapter
(catalog number 1786-RPA) that provides current to the repeaters, connects to
the coax media, and repeats signals from the coax media to the repeater
modules. You can attach up to four repeater modules to one repeater adapter.
There are two channels on each repeater module. Media modules can be mixed
on a single starter module to create mixed media repeaters, that is, coax and
fiber. Because you cannot attach nodes directly to fiber cables, fiber repeaters
are used to link coax segments.
See Determine Repeater Requirements
on page 25 for more information.
TR TR TR TR
R
TT T T
TT T T
NN N N N N
Trunk Line
Drop Line
44989
Segment A Segment B
IMPORTANT
A repeater counts as a device on a segment but does not
require a node address. Therefore, repeaters do not count
against the 99 available node addresses on a ControlNet
network.