Functional safety - Safety instrumented systems for the process industry sector - Part 4: Explanation and rationale for changes in IEC 61511-1 from Edition 1 to Edition 2 (english version)
Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations (see <a href="http://www.iec.ch/functionalsafety">Functional Safety and IEC 61508</a>)— 68 стр.
Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and application programming requirements— 286 стр.
