Installation Guide Manual

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-RPA1786-RPA

1794-ACNR15

1786-RPFM 1786-RPFM

1786-RPCD

* See Important on page 16

1786-RPA 1786-RPFM

1794-ACNR15