NF C20-346-2*NF EN 61511-2:2017 Functional safety - Safety instrumented systems for the process industry sector - Part 2 : guidelines for the application of IEC 61511-1
2017NF C20-346-2*NF EN 61511-2:2017 Functional safety - Safety instrumented systems for the process industry sector - Part 2 : guidelines for the application of IEC 61511-1