TRICONEX (2009) Planning and Installation Guide
TRICONEX (2009) Planning and Installation Guide

The Tricon controller is a state-of-the-art programmable logic and process controller that
provides a high level of system fault tolerance. To ensure the highest possible system integrity
at all times, the Tricon controller includes these features:
• Provides Triple Modular Redundant (TMR) architecture whereby each of three
identical system channels independently executes the control program, and specialized
hardware/software mechanisms “vote” all inputs and outputs.
• Withstands harsh industrial environments.
• Enables field installation and repair to be done at the module level while the controller
remains online. Replacing an I/O module does not disturb field wiring.
• Supports up to 118 I/O modules (analog and digital) and optional communication
modules that interface with Modbus masters and slaves, Foxboro and Honeywell
Distributed Control Systems (DCS), other Triconex controllers in Peer-to-Peer
networks, and external host applications on Ethernet networks.
• Provides integral support for remote I/O modules located as far away as 7.5 miles
(12 kilometers) from the Main Chassis, using SRXM modules.
• Executes control programs developed and debugged with TriStation 1131 or TriStation
MSW software.
• Provides intelligence in the input and output modules to reduce the workload of the
Main Processors. Each I/O module has three microprocessors. Input module
microprocessors filter and debounce the inputs and diagnose hardware faults on the
module. Output module microprocessors supply information for the voting of output
data, check loopback data from the output terminal for final validation of the output
state, and diagnose field-wiring problems.
• Provides integral online diagnostics with adaptive-repair capabilities.
• Allows normal maintenance while the Tricon controller is operating, without
disturbing the controlled process.
• Supports transition to a hot-spare I/O module for critical applications where prompt
service may not be possible.

TRICONEX (2009) Planning and Installation Guide

TRICONEX (2009) Planning and Installation Guide