ONORM EN ISO 25119-1:2024

Tractors and machinery for agriculture and forestry - Safety-related parts of control systems - Part 1: General principles for design and development (ISO 25119-1:2018)

This document highlights general principles and principles for the design and development of safety-related parts of controls (SRP/CS) in agricultural and forestry tractors, self-propelled ride-on machines and mounted, semi-mounted and trailed machines for agricultural equipment. It can also be applied to mobile municipal equipment (e.g. street sweepers). This document does not apply to: - aircraft and hovercraft for agricultural use; - Lawn and garden equipment. This document specifies the characteristics and categories of SRP/CS systems required to perform security functions. It does not contain performance levels for specific applications. This document applies to safety-related parts of electrical/electronic/programmable electronic systems (E/E/PES) as part of mechatronic systems. It addresses the potential hazards of malfunctioning safety-related E/E/PES, including the interactions of these systems. The document does not address hazards associated with electric shock, fire, smoke, heat, radiation, toxicity, flammability, reactivity, corrosion, release of energy, etc., unless these are directly caused by a malfunction of the E/E/PES safety-related systems . In addition, the document addresses the malfunctions of E/E/PES safety-related systems involved in protective measures, protection devices or safety functions in response to hazards not caused by E/E/PES. Examples included in the scope of this document are: - SRP/CS, which limit current flow in hybrid electrical systems to prevent insulation failure and electric shock hazards; - electromagnetic interference with the SRP/CS; - SRP/CS designed for fire protection purposes. Examples not included in the scope of this document are: - insulation failure due to friction leading to the risk of electric shock; - nominal electromagnetic radiation affecting nearby machine control systems; - Corrosion leading to overheating of power cables. This document is not applicable to non-E/E/PES systems (e.g. hydraulic, mechanical and pneumatic). This document does not apply to safety-related parts of controls manufactured before the publication date of this document.