Remote Multiplexing for Digital Systems in Nuclear Power Plants

This paper describes the application of a Remote Multiplexing System specifically designed for use in nuclear power plants, to greatly reduce the amount of instrumentation and control wiring. Adapting a plant to direct digital control at some future date is also discussed. The criteria for such a system are discussed. Extreme care in system and equipment design is required to provide the reliability, environmental durability, insensitivity to electrical transients and immunity to common mode failure.