Rockwell Automation 1786-RG6F INSTL.INSTR CONTROLNET H-FLEX - Manual (Page 3)

ControlNet Standard and High-flex Coax Cable 3
Publication 1786-IN009B-EN-P - November 2003
Determining Trunk-cable Section Lengths
A ControlNet segment is comprised of one or more sections of trunk cable separated by taps
and terminated at both ends. The total cable length of a segment is equal to the sum of all the
trunk-cable sections.
IMPORTANT
When determining the cable length of trunk-cable sections, make sure you
measure the actual cable path as it is routed in your network. Consider
vertical dimensions as well as horizontal dimensions. You should always
calculate the three-dimensional routing path distance when determining
cable lengths.
TIP
Because high-flex RG-6 cable (1786-RG6F) has higher attenuation
than standard RG-6 cable, a segment’s total distance is reduced when
you use high-flex RG-6F cable. Since the amount of high-flex RG-6F
cable you can use in a system is less than the amount of standard RG-6
cable, you should keep high-flex cable use to a minimum. Use TNC or
BNC bullet connectors to isolate areas that require high-flex RG-6F
cable from areas that require standard RG-6 cable; this lets you replace
the high-flex RG-6 section before flexure life is exceeded.
20162-M
terminator terminator
tap tap tap
trunk-cable section trunk-cable section