What Does Safety Instrumented Function (SIF) Mean?
A safety instrumented function (SIF) is a built in operation of a machine that takes the unit to a safe outcome if predetermined conditions are not complied with. The system involves the three elements of logic solver, sensor and final element. Safety instrument functions are also known as emergency shutdown systems, and safety shutdown systems. A similar system is a safety instrumented function, which takes a hazardous situation with a system to an acceptable risk level.