olemus
automaatikasüsteem, millega tagada ohutus
töötingimuste ohtlikuks muutumisel
= automation system to ensure safety when working conditions become dangerous

ülevaateid
https://en.wikipedia.org/wiki/Safety_instrumented_system

https://realpars.com/safety-instrumented-system/

http://rpsonline.com.sg/proceedings/9789810714451/html/SujithPanikkar.pdf

https://www.idc-online.com/technical_references/pdfs/instrumentation/Safety_Instrumented_Systems.pdf

https://scadahacker.com/library/Documents/ICS_Basics/Emerson%20-%20Safety%20Lifecycle%20Workbook.pdf

https://www.smar.com.br/en/technical-article/sis-safety-instrumented-systems-a-practical-view-part-1

https://www.smar.com.br/en/technical-article/sis-safety-instrumented-systems-a-practical-view-part-2

https://www.smar.com.br/en/technical-article/sis-safety-instrumented-systems-a-practical-view-part-3