Safety Instrumented System (SIS)

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Homepage 9 FuSa Glossary 9 Safety Instrumented System (SIS)

A Safety Instrumented System (SIS) implements one or more Safety Instrumented Functions (SIF) using a combination of sensors, logic solvers, and final elements—along with communication and ancillary equipment.

But how is SIS different from SIF? And why does this distinction matter in functional safety?

Let’s break it down with a simple example.👇🏼

Jargon Jive