Rockwell Automation 1786-RPCD ControlNet Modular Repeater Dual Copper Module - Manual (Page 18)

18 ControlNet Dual Copper Repeater Module
Publication 1786-IN001B-EN-P - May 2004
Figure 1 Maximum segment length (assumes you are using 1786-RG6 coax
cable)
For more information in the installation of a coax segment, see publication CNET-IN002,
ControlNet Coax Media Planning and Installation Guide.
EXAMPLE
If your segment requires 10 taps, the maximum segment length is:
1000m (3280ft) - 16.3m (53.4ft) x [10 - 2]
1000m (3280ft) - 130.4m (427.7ft) = 869.6m (2852.8ft)
The total trunk-cable length or number of taps can be increased by
installing repeaters on the segment. This creates another segment.
The amount of high-flex RG-6 cable (1786-RG6F) you can use in a
system is less than the amount of standard RG-6 cable, so you should
keep high-flex cable use to a minimum. Use BNC bullet connectors to
isolate areas that require high-flex RG-6 cable from areas that require
standard RG-6 cable; this allows the high-flex RG-6 section to be
replaced before flexture life is exceeded.
1000 (3280)
750 (2460)
500 (1640)
250 (820)
2 16 32 48
maximum allowable segment length = 1000m (3280ft) - 16.3m (53.4ft) X [number of taps - 2]
number of taps
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