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What is the latest version of IEC 62061

The International Electrotechnical Commission (IEC) 62061 standard was first published in 2005, and it has been revised and updated several times since then. The latest version of IEC 62061, as of now, is the 2015 edition. This article aims to provide an of the latest version of IEC 62061 and its significance in the field of functional safety for electrical, electronic, and programmable electronic control systems.

The Evolution of IEC 62061

Since its initial release, IEC 62061 has undergone several updates to align with the rapid technological advancements and evolving safety requirements. The most recent revision in 2015 introduced significant changes to improve the overall safety performance of machinery and equipment.

One of the notable enhancements in the latest version is the inclusion of a performance level (PL) concept based on the ISO 13849-1 standard. This concept provides a quantitative measure of the safety performance, allowing designers and manufacturers to assess the level of risk reduction provided by their safety-related control systems.

Main Features of the Latest Version

The 2015 edition of IEC 62061 incorporates various important features to ensure functional safety. These include:

Hierarchical structure: The standard defines a hierarchical approach for specifying safety requirements, allowing for a systematic analysis of safety functions at different levels.

Safety integrity levels: It introduces Safety Integrity Levels (SILs) to quantify the required risk reduction measures for safety-related functions.

Reliability data: The latest version provides further guidance on assessing and utilizing reliability data for component selection, contributing to improved system reliability.

Verification and validation: It emphasizes the importance of verification and validation throughout the lifecycle of safety-related control systems, ensuring their integrity and effectiveness.


In conclusion, the latest version of IEC 62061, the 2015 edition, brings significant advancements to functional safety in electrical, electronic, and programmable electronic control systems. With its improved performance level concept, hierarchical structure, safety integrity levels, and other features, it provides a comprehensive framework for developing and assessing safety-related control systems. Manufacturers, designers, and engineers involved in these industries must stay updated with the latest version to ensure compliance and enhance overall safety performance.

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