24  Rockwell Automation Publication CNET-UM001F-EN-P - February 2018 
Coax repeaters are typically used in trunkline and star topologies. See the ControlNet Coax Media Planning and 
Installation Guide, publication CNET-IN002
, for more specific information on coax topologies you can create. 
With fiber media, you can configure your network in trunkline, star, and ring topologies. Only the 1786-RPFRL and 
1786-RPFRXL repeaters support a ring topology. 
For more information, consult the ControlNet Fiber Media Planning and Installation Guide, publication CNET-IN001. 
Figure 7 - Example ControlNet Network Ring Topology 
 
Node 
Fiber cables 
Coaxial cable 
Tap with 1 m (3.28 ft) dropline 
ControlNet Repeater Adapter and Fiber Ring Module 
 
Each ControlNet network supports up to 99 nodes. Logix 5000 controllers 
support multiple ControlNet networks, providing the flexibility to add nodes 
to a ControlNet network or boost performance. 
In a ControlNet network, the maximum length depends on the number of 
nodes on a segment; a segment is a section of trunk between two terminators. 
Use repeaters to add segments or increase length.