INVENSYS TRICONEX 8312 power supply

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INVENSYS TRICONEX 8312 power supply 

Developing an SIS Using the Safety Life Cycle 1 Develop a safety requirement specification (SRS). An SRS consists of safety functional requirements and safety integrity requirements. An SRS can be a collection of documents or information. Safety functional requirements specify the logic and actions to be performed by an SIS and the process conditions under which actions are initiated. These requirements include such items as consideration for manual shutdown, loss of energy source, etc. Safety integrity requirements specify a SIL and the performance required for executing SIS functions. Safety integrity requirements include: • Required SIL for each safety function • Requirements for diagnostics • Requirements for maintenance and testing • Reliability requirements if the spurious trips are hazardous

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