The avoidance of Systematic Failures

Last edit: 06/08/2025

Also, in the case of IEC 62061, it is important to eliminate the Systematic Failures. The way is also to follow the recommendations listed in Table 3.

Table 3: overview of the basic requirements and interrelation to basic subsystem Architectures

Please refer to ISO 13849-2:2012, Annex A to D, for examples of Basic safety principles and Well-tried safety principles. Please refer to ISO 13849-2:2012, Annex A and D for examples of Well-tried components.

Table 3 is the equivalent of Table 7 of IEC 62061. In the latter however, in case of HFT 1 architecture and SFF less than 60%, the use of well-tried components is not required.

Relationship between λD and MTTFD

Index

PT 12: Functional Safety in High Demand: Introduction to IEC 62061 The Architectural Constraints The simplified approach Proof Test in High Demand mode Mission Time and Useful Lifetime The avoidance of Systematic Failures Relationship between λD and MTTFD

Core Competencies

Machinery Directive Machinery Safety Process Safety Functional Safety UL and CSA Conformity Electrical Safety and Arc Flash Mitigation ATEX Risk Gas Furnaces - CE Marking

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