AS IEC 61511.2:2018

The objective of this Standard is to provide guidance on the specification, design, installation, operation and maintenance of safety instrumented functions (SIFs) and related safety instrumented systems (SISs) as defined in AS IEC 61511.1.

This part of IEC 61511 provides guidance on the specification, design, installation, operation
and maintenance of SIFs and related SIS as defined in IEC 61511-1:2016.
NOTE 1 Annex A (informative) has been organized so that each clause and subclause number therein addresses the corresponding clause and subclause number in IEC 61511-1:2016 except for being preceded by “A”.
NOTE 2 Annex A now contains material previously in the body of the first edition. These changes are required for compliance with IEC rules which prohibit a standard being wholly informative.
NOTE 3 To achieve maximum use of this guideline;
– review the section guidance as well as the specific clause guidance. (e.g., when looking for guidance on
5.2.6.1.3, consider guidance in 5.2.6);
– when specific clause guidance is not provided (e.g.; no further guidance provided), consider reviewing the section guidance as well, as it can be applicable).
NOTE 4 Examples given in the Annexes of this Standard are intended only as case specific examples of implementing IEC 61511 requirements in a specific instance, and the user should satisfy themselves that the chosen methods and techniques are appropriate to their situation.

Originated as AS IEC 61511.2-2004.
Second edition 2018.