ICS Triplex TC21202 Safety PLC – TMR Industrial Controller

Overview

The ICS Triplex TC21202 controller delivers high-integrity performance for safety-critical automation. It integrates three synchronized processors that execute identical logic, and it maintains system operation even when one processor fails. Moreover, it supports continuous diagnostics, so it quickly identifies internal faults and drives the installation to a safe condition when required. The TC21202 fits demanding environments in process automation, power generation, and machine safety.

Technical Specifications

Specification	Detail
Model	TC21202
Series	ICS Triplex TMR Safety System
Manufacturer	Rockwell Automation
Architecture	Triple Modular Redundancy with 2-out-of-3 voting
Processor Count	Three independent synchronized processors
Power Input	24 V DC nominal (20–32 V DC range)
Power Consumption	Approx. 70–80 W under full load
Program Storage	Non-volatile memory with secure retention
Event Logging	Sequence-of-events buffer supporting time-stamped diagnostics
Communication Bus	Redundant backplane inter-module communication
Self-Diagnostics	Continuous processor, memory, and bus monitoring
Operating Temperature	0 °C to +60 °C

Physical Characteristics

Dimensions: 266 mm × 31 mm × 303 mm
Weight: 0.8 kg
Country of Origin: United States

Performance & Reliability

The TC21202 strengthens system availability because its triple-processor architecture continues operating when one channel fails. Furthermore, its diagnostic routines evaluate every subsystem continuously, so engineers gain rapid awareness of developing issues. The controller also preserves functional safety by transitioning the plant to a secure state whenever critical faults occur.

Application Areas

The TC21202 supports emergency shutdowns in oil and gas, and it stabilizes turbine protection systems in power plants. It also improves machine guarding applications that demand SIL-rated reliability. Additionally, its deterministic data handling fits high-integrity process control installations.

Integration Notes

Integrators pair the TC21202 with ICS Triplex I/O modules to build scalable TMR architectures. They usually power the controller with redundant 24 V DC supplies and maintain separation between safety and non-safety networks. Engineers configure the three processors with synchronized logic, which ensures identical execution paths across all channels.

Summary

The ICS Triplex TC21202 safety controller provides robust redundancy, continuous health monitoring, and stable performance in harsh industrial environments. Its triple-processor design maintains operation during individual failures, and its diagnostics enhance system confidence in critical control applications.