PD CLC IEC/TR 61511-4:2020 PDF

1   Scope This part of IEC 61511, 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.