Process automation, with its extremely complex sequences, cannot afford to have any weak links in the chain.

To eliminate the hazard sources and minimize risks, you need to have reliable safety technology for your processes that meets even the most stringent demands.

The Safety Instrumented System (SIS) is part of the safety concept for plants, based on IEC 61508 (to SIL 3) and IEC 61511.



The Safety Instrumented System (SIS) is part of the protection of people, equipment, plant and environment. It reacts with an automatic safety shutdown in case the process performs outside the defined limits, and neither the Process Control System nor the plant personnel take action.

Siemens offers high-available, flexible and scalable systems and products for these ambitious requirements to a Safety Instrumented System.