Opto 22, developer and manufacturer of the awardwinning SNAP PAC System™ family of programmable automation controllers, I/O, and accessories, has released the SNAP PAC Redundancy Option Kit (SNAP-PAC-ROK), used to design an Ethernet-based redundant control system with maximum reliability and distributed intelligence that can instantly recover from failure.

Using standard Opto 22 S-series SNAP PACs, SNAP Ethernet I/O, and the newly announced PAC Project Professional 9.0 software suite, combined with the SNAP PAC Redundancy Option Kit, customers can configure automation systems with dual programmable automation controllers (PACs) that essentially synchronize and run in parallel. In the event one controller fails or is knocked offline, the other controller will assume command and continue to execute the control program and the processes it runs with no interruption or restart necessary. This feature, commonly referred to in the automation industry as “redundancy,” provides many advantages. Foremost among these is a significant reduction in the control system’s mean time between failures (MTBF), and thus even greater levels of reliability for process-oriented applications in the manufacturing of semiconductors, thin film LCD, and other high-value product batches. Redundant control systems also prove advantageous (and are frequently mandated) for processing, handling, and transport of chemicals, pharmaceuticals, and oil and gas products and byproducts.

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