Approaching standard by designing a basic safety function

Abstract : This document is intended to guide designers to perform machinery control systems with only one or a few "basic safety functions such as emergency stop or movable guard. Among the available standards for machinery design, EN ISO 13849-1 is the one providing recommendations to design safety related parts of control systems (SRP/CS) implementing different types of energy such as electric, hydraulic or pneumatic. This document is based on the implementation of the simplified method of EN ISO 13849-1 and helps to understand the new concepts introduced by this standard. The first part of the document entitled : Design guide for a SRP/CS, sheds light on some parts of the stahdard and also provides tools (graphs, tables...) to facilitate the understanding and use but also choices that designers will have to do. The second part consists of a practical case of a safety function designed by INRS using the standard and the tools shown in the guide. All phases of design are discussed, highlighting details and comments deemed necessary to assimilate the principles advocated by the standard. Although new, the standard EN ISO 13849-1 does not bring major changes in the design of control systems related to safety. It retains much of the design principles recommended in the standard EN 954-1 that it replaces. The main new of this framework lied in the quantification of a number of parameters. This document is a translation into English of NS 302 first issue in French dated February 2013
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James Baudoin, Jean-Paul Bello. Approaching standard by designing a basic safety function . [Research Report] Notes scientifiques et techniques NS 315, Institut National de Recherche et de Sécurité (INRS). 2014, 56p. ⟨hal-01427504⟩

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