Installation guide

Planning and Designing RIO Cable System

890 USE 101 00 October 2006

Hot Standby Cable Topologies

Overview A Hot Standby (HSBY) system is comprised of two identically configured PLCs with

RIO processors and HSBY modules. The RIO heads are connected via an MA-

0186-X00 splitter so that either can support the same cable system. One of the

PLCs acts as the primary controller that communicates with the RIO network. The

other PLC is the standby controller that maintains current state data updated from

the primary controller via the HSBY module. In the event of a primary PLC failure,

control responsibilities are switched over to the standby device.

Documentation

See the Hot Standby Planning and Installation Guide, part number 840USE10600,

for information regarding kits to implement Quantum Hot Standby operation, as well

as information on the coaxial cable components.

This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com