ISO TR 23849-2010 PDF

Full title and description

ISO/TR 23849:2010 — Guidance on the application of ISO 13849‑1 and IEC 62061 in the design of safety‑related control systems for machinery. This technical report explains the relationship between the two functional‑safety standards and provides practical guidance for selecting and applying the appropriate standard and techniques when designing safety‑related control systems.

Abstract

ISO/TR 23849:2010 is a technical report intended to clarify the application of IEC 62061 and ISO 13849‑1 in the design of safety‑related control systems for machinery. It compares the two standards, describes risk estimation and assignment of required performance, addresses allocation of performance targets (PL versus SIL), and gives guidance on system design, validation and examples.

General information

• Status: Withdrawn.
• Publication date: 2010‑05 (Edition 1, 2010).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.110 — Safety of machinery.
• Edition / version: Edition 1 (2010).
• Number of pages: 14 (technical report length).

Source metadata and lifecycle status as recorded by ISO and major standards distributors.

Scope

The report is intended to help users understand how and when to apply ISO 13849‑1 (safety‑related parts of control systems — performance levels) and IEC 62061 (safety‑related electrical/electronic/programmable electronic control systems — SIL approach) during the design of safety‑related control systems for machinery. It compares principles in both standards, describes risk estimation and the assignment of required performance levels, covers safety requirements specification, allocation of PL versus SIL, and gives guidance for system design using compliant subsystems or SRP/CS (safety‑related parts of control systems), including calculation/estimation of parameters such as PFH and MTTF and use of diagnostic/exclusion provisions; an illustrative example and bibliography are included.

Key topics and requirements

• Comparison of ISO 13849‑1 and IEC 62061 approaches and terminology.
• Guidance on risk estimation and assignment of required performance (PL and SIL allocation).
• Specification of safety requirements for control systems and mapping between PL and SIL targets.
• Design considerations for systems built from compliant subsystems or SRP/CS, and for systems using other IEC/ISO‑based components.
• Estimation and use of reliability metrics (PFH, MTTF) and diagnostic/exclusion treatments.
• Worked example illustrating design and validation of a safety‑related control function.

Typical use and users

Used as guidance (non‑normative) by machine builders, functional safety engineers, system integrators, certification bodies, conformity assessors and standards committees to decide which machinery functional‑safety approach to apply and to interpret/align requirements between ISO 13849‑1 and IEC 62061 during design, verification and validation of safety‑related control systems.

Related standards

Directly related to ISO 13849‑1 (Safety‑related parts of control systems — Part 1), IEC 62061 (safety of machinery — electrical/electronic/programmable electronic safety‑related systems), IEC 61508 (functional safety of electrical/electronic/programmable electronic safety‑related systems), ISO 12100 (general principles for machine safety / risk assessment) and regional/adopted versions (for example EN/BS standards derived from ISO/IEC texts). The report was intended to support interpretation and co‑use of ISO 13849‑1 and IEC 62061.

Keywords

ISO/TR 23849, technical report, ISO 13849‑1, IEC 62061, machine safety, safety‑related control systems, performance level (PL), safety integrity level (SIL), PFH, MTTF, SRP/CS, risk estimation, validation.

FAQ

Q: What is this standard?

A: It is a technical report (ISO/TR 23849:2010) providing guidance on applying ISO 13849‑1 and IEC 62061 when designing safety‑related control systems for machinery.

Q: What does it cover?

A: It covers comparison of the two standards, risk estimation and assignment of required performance, safety requirements specification, allocation/translation between PL and SIL, design guidance for systems using compliant subsystems, reliability parameter considerations (PFH, MTTF), exclusions/diagnostics, and includes a worked example.

Q: Who typically uses it?

A: Machine designers, functional safety and control engineers, system integrators, conformity assessors and certification bodies—anyone needing practical guidance on choosing or aligning ISO 13849‑1 and IEC 62061 approaches for machinery safety.

Q: Is it current or superseded?

A: ISO/TR 23849:2010 has been recorded as withdrawn in the ISO lifecycle. Users should treat it as archived guidance; for current normative requirements consult the latest editions of ISO 13849‑1 and IEC 62061 and national/adopted versions. Some references and editions of ISO 13849‑1 (for example the 2015 revision and subsequent national adoptions) note the technical report as guidance, but the TR itself is listed as withdrawn in ISO records and by several national bodies. Check the currently published editions of the normative standards for binding requirements.

Q: Is it part of a series?

A: It is a standalone ISO Technical Report intended to support ISO/TC 199 and IEC/TC 44 work; it supplements (but does not replace) the normative standards ISO 13849‑1 and IEC 62061. It is not a numbered part of either standard series.

Q: What are the key keywords?

A: ISO 13849‑1, IEC 62061, PL, SIL, safety‑related control systems, machine safety, PFH, MTTF, SRP/CS, risk estimation, validation.