NF EN ISO 25119-4, U05-150-4 (09/2023)

This document establishes general principles for the design and development of safety-related parts of control systems (SRP/CS) used on agricultural and forestry tractors, on self-propelled ride-on machines and on mounted, semi-mounted machines. -spans and trails used in agriculture. It may also be applicable to mobile municipal equipment (for example cleaning machines). It specifies the characteristics and categories required of SRP/CS to achieve their security functions. This document is not applicable to: — airborne and air-cushioned vehicles used in agriculture; — equipment for gardens and lawns. This document specifies the characteristics and categories required of SRP/CS to perform their safety-related functions. It does not identify performance levels for specific applications. NOTE 1 Machine-specific standards (type C standards) may specify performance levels (AgPL) for safety-related functions in machines within their scope. Otherwise, specification of the AgPL is the responsibility of the manufacturer. This document is applicable to parts relating to the safety of electrical/electronic/programmable electronic systems (E/E/PES), as these relate to mechatronic systems. It covers possible hazardous phenomena due to the functional behavior of safety-related E/E/PES systems, including interactions between these systems. It does not address hazards caused by the equipment itself (electric shock, fire, fumes, heat, radiation, toxicity, flammability, reactivity, corrosion, release of energy, and similar hazards, unless caused directly by a failure in the behavior of safety-related E/E/PES systems. It also addresses the failure in the behavior of safety-related E/E/PES systems involved in protective measures, guards or functions related to safety. safety in response to hazards outside E/E/PES Examples included in the scope of this document: — Safety-related machine parts (SRP/CS) that limit current flow in electric hybrids. prevent dangerous insulation breakdown/shock phenomena; — electromagnetic interference with SRP/CS; — SRP/CS designed to prevent fires: — insulation breakdown due. friction which causes electric shock phenomena; — nominal electromagnetic radiation which impacts the surrounding control systems of the machine; — corrosion leading to overheating of electrical cables. This document is not applicable to non-E/E/PES systems (e.g. hydraulic, mechanical and pneumatic). NOTE 2 For design principles relating to machine safety, see also ISO 12100. This document is not applicable to safety-related parts of control systems manufactured before the date of its publication.
(Automatic translation from French)