IEC 61508-7 pdf download.Functional safety of electrical/electronic/ programmable electronic safety-related systems 1 Scope 1.1 This part of IEC 61508 contains an overview of various safety techniques and measures relevant to IEC 61508-2 and IEC 61508-3. NOTE The references should be considered as basic references to methods and tools or as examples, and may not represent the state of the art....