Which concept is primarily involved in ensuring safety in automated industrial processes by responding to predefined conditions?

Which concept is primarily involved in ensuring safety in automated industrial processes by responding to predefined conditions?

• A. Information Sharing and Analysis Center (ISAC)
• B. Energy (Industries and Sectors)
• C. Safety Instrumented System (SIS)
• D. Logistics (Industries and Sectors)

Answer: (C)

In automated industrial processes, safety is maintained by automatic responses that activate when conditions become unsafe. This control is handled by a Safety Instrumented System, which continuously monitors critical process variables against predefined safety thresholds. When a parameter crosses a safe limit, the SIS automatically executes protective actions—such as shutting down equipment, isolating a process, or venting pressure—to bring the system to a safe state. The SIS is designed to be independent from normal process control to reduce the chance of common-cause failures and is evaluated for functional safety with appropriate reliability ratings.

Other concepts relate to different roles: information sharing centers focus on cyber threat intelligence, while terms like energy or logistics refer to sectors or domains rather than the safety mechanism itself.