What is SIS?

A Safety Instrumented System (SIS) is a system that provides an independent and predetermined emergency shutdown path in case a process runs out of control.

SIS - Safety Instrumented System

SIS Function in the Process

Download PPT:


  • The Safety Instrumented System
  • A review of Chemical Industry Accidents
  • Evolution of Regulations and Standards
  • Preventing Accidents: Risk Reduction
  • Concept of risk reduction
  • Accidents and Causes: The Human Factor
  • Safety Instrumented Systems as a safety barrier
  • Design & Engineering SIS: IEC 61508/ 61511 & FSM
  • Operation & Maintenance
  • Safety Lifecycle expectation & expectations on users

Safety Instrumented System.pdf (2.4 MB)

source: yokogawa