ControlNet Fiber-optic Ring Repeater Modules
9
Rockwell Automation Publication 1786-IN003D-EN-P - April 2011
The maximum number of repeater modules (in any combination) you can use in
a configuration is dependent on the current draw of each repeater module. Total
current draw supplied by the 1786-RPA/B repeater adapter cannot exceed
1.6 A @ 5V DC.
In addition to using the fiber repeater in a ring topology, you can do the
following:
•
Extend the total length of your segment
•
Create a point-to-point or star configuration (multiple directions from
one point)
•
Provide electrical isolation and immunity to interference
•
Use in hazardous areas
The number of fiber repeaters and cable length total limit depends on your
network topology.
Example Topology Application
See
page 10
for an example topology.
For more information on topology application rules in relation to fiber rings,
refer to the ControlNet Fiber Media Planning and Installation Guide,
publication
CNET-IN001
.
IMPORTANT
You cannot have media redundancy if you have a closed loop ring
installation anywhere in the network. You may use the
1786-RPFRL/B, 1786-RPFRXL/B, 1786-RPFM, or 1786-RPFS
modules in a linear fiber topology.
Do not mix fiber repeater modules to achieve a ring topology and
1786-RPFM modules to achieve a redundant media topology in
one configuration.
For additional topology configurations, refer to Allowable
Configurations When Using Repeaters in a Ring Topology on
ControlNet, Knowledgebase Technical Note
ID 32215
.
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