Installation guide

Planning and Designing RIO Cable System
890 USE 101 00 October 2006 55
Each drop cable is run from a Modicon MA-0185-100 tap in the trunk cable. Four of
these taps lie between our two end points, and we must calculate their tap insertion
loss (TIL):
The drop cable attenuation (DCA) at drop 5 has been predetermined as 0.3 dB. The
attenuation of the tap (TDA) at drop 5 is 14 dB. Since this system does not use a
splitter, the NOS is 0.
Thus, the total attenuation for this RIO network is:
This example shows a properly designed RIO cable system with:
z total attenuation less than 35 dB
z no drop cables longer than 164 feet (50 m)
z combined cable distance (drop and trunk cables) less than 8400 ft (2560 m)
TIL NOT 0,8dB× 40,8× 3,2dB===
5,23 0,3 14 3,2+ + + 22,73dB=
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com