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Triple Modular Redundancy For Process Control

Thursday, March 18, 2004

POMPANO BEACH, Fla.-March 18, 2004-For mission-critical processes and applications, there's no substitute for Triple Modular Redundancy (TMR).

RTP has created a new TMR architecture designed specifically for process control. The 2300-T HICS High Integrity Control System ensures the highest integrity and the highest availability of user data. It utilizes voting routines to ensure the process is protected and-equally important-that expensive downtime is eliminated.

Better Than Traditional TMR

An 2300-T has more flexibility than traditional TMR systems. Where past TMR systems were limited because of the hardware used to synchronize CPUs and because their I/O was not distributable, RTP has taken advantage of today's high speed networking technology-including high-speed logic switching and a fast Ethernet-based I/O bus-to do away with the limiting hardware required for older systems. As a result, the three controllers that comprise the 2300-T can be housed separately to ensure survivability in a catastrophe, such as a fire.

Additional I/O chassis can be located remotely from the three controllers to eliminate the high cost and complexity of homerun wiring.

To ensure added availability, a dual-powered chassis can be added for both processor and I/O.

Where requirements may dictate several redundant processors, the 2300-T ensures process integrity and availability for less cost and less complexity. High-Integrity Validation Redundancy protects against hardware failure for high system availability, but does not provide for error checking. The RTP HICS is suited for high-integrity, fault checking applications. Its high-integrity communications are validated using advanced built-in CRC routines on both the host and the I/O bus. For critical operations, such as program changes, special routines check and recheck the program validity. Outputs from all three processors are sent to the I/O chassis where the voting occurs, as close to the process as possible.

An Extended Family of Voting Systems

RTP offers a complete family of high-integrity voting systems for process control.

  • 2300-T: For the highest level of integrity and availability, the 2300-T Triple Modular Redundant system features voting with triple, dual or common I/O, as required.
  • 2300-D: The 2300-D HICS is built on the same advanced technology as 2300-T, for a dual-redundant solution. The voting solution uses advanced diagnostics to assist in results adjudication. The 2300-D features dual-redundant processors, triple, dual or common I/O as required, and up to 32 remote I/O chassis, all built upon the same components and configuration environment (RTP NetSuite) as the 2300-T. 

Both the 2300-T and 2300-D support a medium to large distributed control system architecture of up to 10,000 I/O points per node.

For smaller systems, the Micro2000D series HICS also provides a voting solution using dual processors and I/O. The Micro2000D series uses a subset of the same components as the 2300-T, and RTP NetSuite.

HICS Architecture

The RTP High-Integrity Control System architecture is extremely scalable, flexible, and incorporates multiple levels of redundancy. Its unique design is built upon a set of standard hardware and software components that supports multiple factory-configured applications. These standard components (processors, chassis, I/O and configuration environment are designed to be configured different systems ranging from single controller or dual redundant up to a triple-modular redundant solution.

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About RTP

Founded in 1968, RTP Corp. is a developer and manufacturer of high-performance industrial data acquisition and control systems. Markets for RTP Corporation's products include process control (steel, aluminum, and glass), flight simulation, nuclear power plant simulation and data acquisition, petrochemical, fossil fuel power plant control, factory automation, and research and development testing. RTP offers a wide range of rugged hardware and object oriented software industrial control solutions that include hot standby and seamlessly redundant systems for mission-critical applications.