DIN EN 61511-1-2005
功能安全.加工工业部门用安全仪表化系统.第1部分:框架、定义、系统、硬件和软件要求
Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and software requirements (IEC 61511-1:2003 + Corrigendum 2004); German version EN 61511-1:2004