Rockwell Automation 1786-series ControlNet Fiber Media Planning and Installation Guide - Manual (Page 21)

Rockwell Automation Publication CNET-IN001C-EN-P - October 2011 21
Get Started with the ControlNet Network Fiber Media System Chapter 1
Install Repeaters in a Series
Series is defined as the number of repeater assemblies (repeater adapter plus fiber
repeater module) between two devices on a network
. When you install fiber
repeaters in a series, use the RSNetWorx™ for ControlNet™ software to verify that
the system is an allowable configuration. The system size is based on the
maximum number of repeaters in a series and maximum length of the media used
between any
two nodes.
When you install repeaters in series, you can install a maximum of:
• 5 repeater modules (or 6 segments) with a 1786-RPA/A series A
repeater adapter
• 20 repeater modules (or 21 segments) with a 1786-RPA/B series B
repeater adapter
Figure 5 - Fiber Repeaters in a Series
In Figure 5 , the maximum number of fiber repeaters is 3, because a message from
coax segment 1 to coax segment 2 travels through 3 repeaters in series (A, B,
and C).
For any given architecture, the highest number of repeaters that a message might
travel through to get from any single node to another determines the number of
repeaters in a series.
Node 1
Node 2 Node 3
Repeater A
Coax Segment 1
Coax Segment 2
Coax Segment 4
Coax Segment 3
Repeater B Repeater C
Node 4
Node 5
Node 6
42306
Fiber Cable 1 Fiber Cable 2
1786-RPA 1786-RPA
1794-ACNR15
1786-RPFM 1786-RPFM 1786-RPCD
* See Important on page 16
*
1786-RPA 1786-RPFM
1794-ACNR15
1794-ACNR15
1794-ACNR15
1794-ACNR15