Rockwell Automation Allen-Bradley ControlNet 1734-ACNR User Manual page 170

C-8 Determine Your ControlNet Media Requirements
Publication CNET-UM001C-EN-P - November 2005
The total allowable length of a segment containing standard RG-6 quad shield
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 1,000 m (3280 ft) with two taps connected. Each
additional tap decreases the maximum length of the segment by 16.3 m (53 ft).
The maximum number of taps allowed on a segment is 48 with a maximum
length of 250 m (820 ft).
Maximum Allowable Segment Length = 1000 m (3280 ft) - 16.3 m (53.4 ft) X [number of taps - 2]
1000 (3280)
750 (2460)
500 (1640)
250 (820)
2
Number of Taps
If your segment requires 10 taps, the maximum segment
EXAMPLE
length is:
1000 m (3280 ft) - 16.3 m (53.5 ft) x [10 - 2]
1000 m (3280 ft) - 130.4 m (427.7 ft) = 869.6 m (2852.3 ft)
30014-m
32 48
16