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Glossary

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Safety Instrumented Systems (SIS)

Systems of hardware and software which are designed to detect a hazardous out of control condition and return them to a safe state. By definition they must be automatic and independent of other protective or control systems.


A combination of sensors, logic solver and final elements that performs one or more safety instrumented functions.

Reference: Layer Of Protection Analysis - Simplified Process Risk Assessement, 2001, CCPS, ISBN 0-8168-0811-7

 

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