DIN EN 61511-3:2019 功能安全 過程工業領域的安全儀表系統 第3部分:確定所需安全完整性水平的指南 (IEC 61511-3:2016)
Functional safety - Safety instrumented systems for the process industry sector - Part 3: Guidance for the determination of the required safety integrity levels (IEC 61511-3:2016); German version EN 61511-3:2017