DIN EN ISO 25119-3 E 2018-11 PDF

Full title and description

STB DIN EN ISO 25119-3 E 2018-11 — Tractors and machinery for agriculture and forestry — Safety-related parts of control systems — Part 3: Series development, hardware and software. This document provides principles and requirements for the series development (hardware and software) of safety‑related parts of control systems (SRP/CS) used on tractors and agricultural/forestry machinery; it is the international ISO text and is also adopted by national bodies under the DIN EN ISO designation.

Abstract

This part of ISO 25119 sets out general principles for the design and series development (hardware and software) of safety‑related parts of electrical/electronic/programmable electronic systems (E/E/PES) for tractors, self‑propelled ride‑on machines, and mounted/semi‑mounted/trailed agricultural machines. It specifies characteristics and categories required of SRP/CS for carrying out safety‑related functions, addresses hazards due to malfunctioning behaviour of E/E/PES and interactions between such systems, and excludes non‑E/E/PES systems and hazards not directly caused by E/E/PES malfunctioning.

General information

• Status: Published (international standard; edition reviewed and confirmed as current in 2024).
• Publication date: Edition 2 — October 2018 (ISO publication). Note: national adoptions (DIN EN ISO titles) are often given local publication/adoption dates (the STB/DIN EN ISO designation in some catalogues is shown with a 2018-11 label).
• Publisher: International Organization for Standardization (ISO); text is commonly made available under national adoption titles (DIN EN ISO) by national bodies.
• ICS / categories: 35.240.99 (IT applications in other fields) / 65.060.01 (Agricultural machines and equipment in general).
• Edition / version: Edition 2 (ISO 25119-3:2018). Amendment 1 published 2020 (ISO 25119-3:2018/Amd 1:2020); national/adopted consolidated texts may include that amendment.
• Number of pages: 59 pages (ISO edition 2018). National/adopted versions or consolidated editions that include amendments may show a different page count.

Scope

Applies to the safety‑related parts of electrical/electronic/programmable electronic systems (E/E/PES) used on tractors and agricultural/forestry machinery for the purpose of defining SRP/CS characteristics and development practices in series production. It is intended to cover hazards caused by malfunctioning E/E/PES behaviour (including interactions), and to support manufacturer responsibility for specifying application performance levels where machine‑specific type‑C standards do not. It does not address non‑E/E/PES systems or hazards not directly caused by E/E/PES malfunctioning (for example general fire or corrosion unless caused by E/E/PES failure).

Key topics and requirements

• Series development lifecycle requirements for SRP/CS (hardware and software).
• System design objectives, prerequisites and documentation requirements for safety functions.
• Specification of categories/characteristics required of SRP/CS to perform safety‑related functions.
• Requirements addressing malfunctioning behaviour of E/E/PES and interactions between safety systems.
• Guidance on allocation of safety requirements where machine‑specific performance levels (AgPL) are not specified by type‑C standards.
• Traceability, verification and validation practices for hardware and software in SRP/CS series development.
• Notes on exclusions — non‑E/E/PES hazards, and hazards not directly caused by E/E/PES malfunctioning.

Typical use and users

Used by manufacturers, system integrators and suppliers of control systems and electronic/electrical/programmable components for tractors and agricultural/forestry machinery; also used by conformity assessment bodies, testing laboratories, and technical committees developing machine‑specific safety standards. Engineers responsible for functional safety, product managers, and quality assurance teams use it to define development processes, allocate safety requirements, and demonstrate that SRP/CS meet recognized good practice.

Related standards

Part of the ISO 25119 series (Parts 1–4): Part 1 — General principles for design and development; Part 2 — Concept phase; Part 3 — Series development, hardware and software (this document); Part 4 — Production, operation, modification and supporting processes. Amendments to Part 3 (Amd 1:2020) are available and national/adopted versions (DIN EN ISO) may consolidate amendments. For machine‑specific performance levels, consult relevant type‑C standards and ISO 12100 for general machinery safety design principles.

Keywords

ISO 25119‑3, SRP/CS, safety‑related parts of control systems, tractors, agricultural machinery, series development, hardware, software, functional safety, E/E/PES, AgPL, DIN EN ISO.

FAQ

Q: What is this standard?

A: ISO 25119‑3:2018 is Part 3 of the ISO 25119 series specifying requirements and guidance for series development (hardware and software) of safety‑related parts of control systems for tractors and agricultural/forestry machinery. It is the international ISO text and is commonly adopted nationally under titles such as DIN EN ISO 25119‑3.

Q: What does it cover?

A: It covers principles, development lifecycle requirements, documentation, verification/validation and the characteristics/categories required of SRP/CS (E/E/PES) to perform safety functions and address hazards due to malfunctioning behaviour and system interactions. It excludes non‑E/E/PES hazards not caused by E/E/PES failures.

Q: Who typically uses it?

A: Manufacturers of tractors and agricultural/forestry machinery, suppliers of control hardware and software, functional‑safety engineers, testing and conformity bodies, and standards committees developing machine‑specific (type‑C) safety requirements.

Q: Is it current or superseded?

A: The ISO 25119‑3:2018 edition is a published international standard; the ISO record indicates this edition was reviewed and confirmed as current in 2024. An amendment (ISO 25119‑3:2018/Amd 1:2020) is published and may be incorporated in national/adopted consolidated texts. Users should check whether a consolidated national edition (DIN EN ISO) or later amendments exist before assuming the exact text to apply.

Q: Is it part of a series?

A: Yes — ISO 25119 is a four‑part series covering safety‑related parts of control systems for tractors and agricultural/forestry machinery (Parts 1–4). Part 3 is the series development (hardware and software) component.

Q: What are the key keywords?

A: SRP/CS, E/E/PES, functional safety, series development, hardware, software, tractors, agricultural machinery, ISO 25119, DIN EN ISO.