Understanding the Difference Between ISO 13849-1:2023 and IEC 61508
The following content provides a thorough comparison between SN EN ISO 13849-1:2023 and IEC 61508 standards, focusing on their application in safety-related parts of control systems. By understanding the differences between these two standards, professionals can make informed decisions about which standard best suits their machinery's safety requirements.
SN EN ISO 13849-1:2023
Sicherheit von Maschinen - Sicherheitsbezogene Teile von Steuerungen - Teil 1: Allgemeine Gestaltungsleitsätze (ISO 13849-1:2023)
Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design (ISO 13849-1:2023)
This document specifies a methodology and provides related requirements, recommendations and guidance for the design and integration of safety‐related parts of control systems (SRP/CS) that perform safety functions, including the design of software. This document applies to SRP/CS for high demand and continuous modes of operation including their subsystems, regardless of the type of technology and energy (e.g. electrical, hydraulic, pneumatic, and mechanical). This document does not apply to low demand mode of operation. NOTE 1 See 3.1.44 and the IEC 61508 series for low demand mode of operation. This document does not specify the safety functions or required performance levels (PLr) that are to be used in particular applications. NOTE 2 This document specifies a methodology for SRP/CS design without considering if certain machinery (e.g. mobile machinery) has specific requirements. These specific requirements can be considered in a Type‑C standard. This document does not give specific requirements for the design of products/components that are parts of SRP/CS. Specific requirements for the design of some components of SRP/CS are covered by applicable ISO and IEC standards. This document does not provide specific measures for security aspects (e.g. physical, IT-security, cyber security). NOTE 3 Security issues can have an effect on safety functions. See ISO/TR 22100-4 and IEC/TR 63074 for further information.
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Why compare SN EN ISO 13849-1:2023 and difference between ISO 13849-1:2023 and IEC 61508
The comparison between SN EN ISO 13849-1:2023 and IEC 61508 is essential for engineers, safety managers, and compliance officers in the machinery sector. These professionals often seek clarity on which standard to adopt for the design and implementation of safety-related control systems (SRP/CS). The choice between these standards can significantly impact the safety integrity and performance of machinery. Understanding their differences helps organizations ensure compliance with relevant regulations and enhance the safety of their operations.
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How SN EN ISO 13849-1:2023 approaches the topic
SN EN ISO 13849-1:2023 provides a comprehensive framework for the design and integration of safety-related parts of control systems in machinery. It emphasizes the importance of performance levels (PLr) that correspond to the safety requirements of specific applications. The standard outlines general principles for SRP/CS, including high-demand and continuous mode operations, while excluding low-demand mode operations. It also details the software design for safety functions and considers various technology types, such as electrical and hydraulic systems. Furthermore, SN EN ISO 13849-1:2023 is aligned with European directives, offering guidance for compliance, which is crucial for manufacturers operating within the European market.
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How difference between ISO 13849-1:2023 and IEC 61508 approaches the topic
IEC 61508 is a foundational standard for functional safety across various sectors, including machinery. Unlike SN EN ISO 13849-1:2023, which focuses specifically on machinery safety, IEC 61508 provides a broader framework applicable to all safety-related systems. It addresses the entire lifecycle of safety systems, from concept through decommissioning, and emphasizes the need for systematic safety management processes. This standard also defines safety integrity levels (SIL) that help organizations assess the risk and implement appropriate safety measures. While both standards aim to enhance safety, IEC 61508 is more comprehensive and applicable across diverse industries, whereas SN EN ISO 13849-1:2023 is tailored specifically to machinery.
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Side-by-side comparison
| Criteria | SN EN ISO 13849-1:2023 | IEC 61508 |
|---|---|---|
| Scope | Focused on machinery safety | Broad scope covering all safety systems |
| Audience | Primarily machinery manufacturers | Applicable to multiple industries |
| Cost/Effort | Moderate, specific to machinery design | Higher due to comprehensive lifecycle approach |
| Certification Mechanism | Compliance with European directives | SIL-based assessments for various applications |
| Typical Use Cases | Safety functions in machinery | Safety-related systems in various sectors including automotive and process control |
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When to choose which
- If you need a standard specifically for machinery safety, choose SN EN ISO 13849-1:2023. It provides targeted guidance for designing safety-related control systems in manufacturing environments.
- If your work involves a broader range of safety systems across different industries, choose IEC 61508. This standard is ideal for organizations that require a comprehensive approach to functional safety.
- If you are operating within the European market, consider SN EN ISO 13849-1:2023 for compliance with local regulations. It aligns closely with European directives, ensuring you meet necessary legal requirements.
- If you are developing safety systems that include software components, opt for IEC 61508. This standard offers robust guidelines for software safety and is applicable across various technologies.