Telemetering and Surveillance Monitoring of Process Control Signals

摘要

The advent of electronics into process control resulted in the collection of the process monitoring and control hardware at a centralized location. This approach while improving the system maintainability and operational safety, brought with it the new problem of Intercommunication with the process. The Centralized System has to receive signals from the measuring sensors which measure physical quantities like temperature, pressure, flow, level etc. and output signal to feed the final actuators. A typical system requires the Telemetering of hundreds of measurement and control signals over several thousand meters apart from all important man-machine communication links.