Rockwell Automation 1786-series ControlNet Fiber Media Planning and Installation Guide - Manual (Page 22)

22 Rockwell Automation Publication CNET-IN001C-EN-P - October 2011
Chapter 1 Get Started with the ControlNet Network Fiber Media System
Install Repeaters in Parallel
When you install repeaters in parallel, you can install a maximum of 48 repeaters
(the maximum number of taps per 250 m segment).
Figure 6 shows an example of
fiber repeaters being used in parallel.
Figure 6 - Fiber Repeaters in Parallel
Fiber repeaters A and B are in parallel off of coax segment 1. The network
example shows 2 fiber repeaters in series. This is determined by counting the
number of fiber repeaters a message must travel through to get from one node to
another. For example, if a message travels from node 1 to node 2 (B, C) or from
node 1 to node 3 (A,D), it travels through 2 fiber repeaters.
42307
Coax Segment 1 Coax Segment 2 Coax Segment 3
Node 1
Node 2 Node 3
Repeater A Repeater B Repeater C Repeater D
1786-RPA 1786-RPA 1786-RPA 1786-RPA 1786-RPFM 1786-RPFM 1786-RPFM 1786-RPFM
1794-ACNR15 1794-ACNR15
Fiber Cable 1
Fiber Cable 2