Installation guide

Planning and Designing RIO Cable System
890 USE 101 00 October 2006 41
Planning for
System
Expansion
The potential for system expansion should be considered in the initial design. It is
less costly to provide for expansion in the original RIO network plan than to redesign
the network later. If your PLC is able to support more RIO drops than your current
plan requires, consider installing additional taps along the network trunk cable.
If, for instance, you intend to use a Quantum CPU, which could support up to 31
remote drops, and your current plan calls for only 10 remote drops, you can install
as many as 21 extra taps for future expansion. Remember that the unused
expansion taps need to be terminated (see Network Terminators, p. 83).
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com