Safety instrumented systems (SISs) are designed for use in emergency shutdown and fire-and-gas systems in oil refineries, natural-gas processing facilities, petrochemical plants, and oil-and-gas production facilities. ProSafe-RS is a programmable-type system equipped with safety and process control functions. ProSafe-SLS is a solid-state system equipped with a magnetic core. If a problem occurs anywhere in a plant, the sequence-of-event (SOE) data from both SISs is displayed on an integrated screen at the operator terminals. Operators and maintenance engineers can then use this data to quickly identify and analyze the root causes of the problem.

Yokogawa Corp. of America