IEC TR 61511-4:2020

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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

Published By	Publication Date	Number of Pages
IEC	2020-02-19	44

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Categories: 13.110 - Safety of machinery, 25.040.01 - Industrial automation systems in general, IEC

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IEC TR 61511-4:2020(E), Functional safety – safety instrumented systems for the process industry sector, which is a Technical Report:
• specifies the rationale behind all clauses and the relationship between them,
• raises awareness for the most common misconceptions and misinterpretations of the clauses and the changes related to them,
• explains the differences between Ed. 1 and Ed. 2 of IEC 61511-1 and the reasons behind the changes,
• presents high level summaries of how to fulfil the requirements of the clauses, and
• explains differences in terminology between IEC 61508-4:2010 and IEC 61511-1 Ed. 2.