Rockwell Automation 1786-RPCD ControlNet Modular Repeater Dual Copper Module - Manual (Page 17)

ControlNet Dual Copper Repeater Module 17
Publication 1786-IN001B-EN-P - May 2004
Redundant Topology
Use redundant media when you need module and media redundancy. With redundant media,
the channel-to-channel skew travel time difference must be less than 1.6
µ s.
For more information on redundant topology, refer to the ControlNet Fiber Media Planning
and Installation Guide, publication CNET-IN001.
Understand Constraints of the Coax Segment
The total allowable length of a segment containing standard RG-6 quad shield coaxial cable
depends upon the number of taps in your segment. There is no minimum trunk-cable section
length requirement.
The maximum allowable total length of a segment is 1,000m (3,280ft) with two taps
connected. Each additional tap decreases the maximum length of the segment by 16.3m
(53ft). The maximum number of taps allowed on a segment is 48 with a maximum length of
250m (820ft).
TIP
Redundant media can be used with series and star topologies. You
cannot use redundant media with ring redundant topology.
31497-M
1786-RPA 1786-RPA
CH B
CH A
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CH A
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CH1 CH2
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CH1 CH2
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CH1 CH2
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