Abstract
Large accelerator programme instrumentation and control for monitoring of large no. of parameters for cryogenic/cooling system. The parameters are Cryo Temperature, Vacuum, He Level and He flow etc. The circumference of the accelerator may vary up to several kilometers. Large size accelerators require huge cabling and hardware. The use of foundation fieldbus based Transmitters for measurement and Control valves field positioners for cryo system shall reduce the cabling, hardware, maintenance and enhance data processing and interoperability.Safety is an important requirement for efficient, trouble free and safe operation of any process industry such as cryo used in accelerators. Instrumentation and Control systems can be developed using Foundation Field Bus. The safety features in foundation field bus system can be achieved by use of intrinsic safe devices, fail safe configuration, minimize the hazard by distribution of control function blocks, short circuit preventers.Apart from above features, the significant cable reduction in the fieldbus system reduces the hazard due to electrical cable fire, which is considered one of the major risk in industry. Further the reliability in fieldbus can be improved by hot stand-by redundant power supply, hot stand-by redundant CPU, hot stand-by redundant network capability and use of link active scheduler.
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