SIST EN ISO 25119-4:2023 PDF

Overview

EN ISO 25119-4:2023 - "Tractors and machinery for agriculture and forestry - Safety-related parts of control systems - Part 4: Production, operation, modification and supporting processes" provides principles and requirements for managing safety-related parts of control systems (SRP/CS) during production, operation, modification and supporting processes. The standard focuses on electrical/electronic/programmable electronic systems (E/E/PES) as they relate to mechatronic machinery used in agriculture, forestry and some municipal equipment. It defines required characteristics and categories for SRP/CS but does not assign specific performance levels (AgPL), which remain the responsibility of machine-specific standards or the manufacturer.

Key topics

• Scope and applicability
  • Targets tractors, self-propelled ride-on machines and mounted, semi‑mounted and trailed agricultural/forestry machinery.
  • Applies to SRP/CS involving E/E/PES; excludes non‑E/E/PES systems (hydraulic, mechanical, pneumatic).
  • Not applicable to aircraft, air‑cushion vehicles for agriculture, lawn & garden equipment, or SRP/CS manufactured before publication.
• Quality management system
  • Requirements for maintaining production and process controls that affect SRP/CS safety.
• Safety validation and verification
  • Planning and execution of validation/verification activities, test specifications and required work products to confirm SRP/CS meet safety objectives.
• Hazard focus
  • Covers hazards resulting from malfunctioning behaviour and system interactions (e.g., EMI, current‑limiting in hybrids, SRP/CS preventing fire).
  • Excludes hazards not directly caused by E/E/PES malfunction (e.g., corrosion‑induced overheating unless caused by SRP/CS failure).
• Supporting processes
  • Procedures for modification, maintenance, operation and traceability of SRP/CS across the product lifecycle.

Applications

• Ensures safe production, operation and modification of electronic control systems on agricultural and forestry machinery.
• Used to develop process controls, test plans and validation evidence for SRP/CS in manufacturing and after‑market modification.
• Helps OEMs and suppliers reduce safety risks related to E/E/PES malfunction, electromagnetic interference and system interactions.

Who should use this standard

• Manufacturers and OEMs of tractors and agricultural/forestry machinery
• E/E/PES hardware and software suppliers
• Quality, safety and compliance engineers
• Certification bodies assessing conformity with machinery safety requirements

Related standards

• EN ISO 25119 Parts 1–3 (general principles; concept phase; series development, hardware & software)
• ISO 12100 (general machine safety/design principles)
• Supports presumption of conformity with EU Directive 2006/42/EC when used alongside relevant normative references.

Keywords: SRP/CS, safety-related parts of control systems, EN ISO 25119-4:2023, E/E/PES, agricultural machinery safety, safety validation and verification, production and modification processes.