Point-to-point topology – Rockwell Automation 1786-series ControlNet Fiber Media Planning and Installation Guide User Manual
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Rockwell Automation Publication CNET-IN001C-EN-P - October 2011
Chapter 1 Get Started with the ControlNet Network Fiber Media System
You can configure these topologies on a ControlNet network:
•
•
•
Point-to-Point Topology
Point-to-point is also called a bus or a trunk line topology. A point-to-point
topology can be described as one fiber module transmitting to another module.
For example, you cannot transmit from a medium-distance module to a
short-distance module.
Figure 2 - Example Point-to-Point (Trunk Line) Topology
Coax Segment 1
Coax Segment 2
Coax Segment 3
Fiber Cable 1
Fiber Cable 2
Fiber Cable 3
See Important
below
IMPORTANT
It is not necessary to install nodes on coax segments. If you are using
only the repeaters to extend the network, install a 75-
Ω
terminator
(catalog number 1786-XT) on the BNC coax connector on the
1786-RPA/B repeater adapter or 1786-RPCD module. This should be done
to all repeater modules that are not connected to coax segments.