What is a safety instrumented system (SIS)?
Safety interlock system, safety instrumented system, safety shutdown system, emergency shutdown system, protective instrument system-the assorted names go on and on!
These systems are designed to :
a) Permit to process to move forward in a safe manner when specified conditions allow, or
b) Automatically take the process to a safe state when specified conditions are violated, or
c) Take action to mitigate the consequence of industrial hazad.
Safety Instrumented Systems, Design, Analysis and Justification 2nd Edition Paul Gruhn, and Harry L.Cheddie
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