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ISO 3691-4:2023 is the current international safety standard for driverless industrial trucks, including automated guided vehicles (AGVs), autonomous mobile robots (AMRs), and similar automated systems. It establishes the safety requirements and verification methods needed throughout the life cycle of these vehicles, from design and operation to maintenance. Key Sections of the Standard

The standard is divided into several major sections and annexes that address hardware, software, and operational safety:

Safety Requirements & Risk Reduction (Section 4): Details hardware design (e.g., ground clearance to prevent trapped feet) and operational software requirements.

Operating Zone Preparation (Annex A): Specifies how different environments (confined, restricted, or public zones) affect safe operation and the required clearances.

Hazard Catalogue (Annex B): Lists significant hazards, such as design flaws or foreseeable misuse, that must be addressed in risk assessments.

Control Systems & Functional Safety: Focuses on Performance Levels (PL) for safety functions, preventing unintended restarts, and managing control-circuit failures. Core Technical Requirements Iso 3691-4 Pdf

Personnel Detection: Trucks must detect people in their intended path across their full width. This includes the use of pressure-sensitive protective devices like bumpers and electro-sensitive equipment like light curtains or scanners.

Braking & Speed Control: Systems must initiate a stop if they exceed rated speeds or lose control. The braking system must be able to stop the truck within the detection range of its safety sensors.

Stability & Load Handling: Requires constant monitoring of speed to ensure stability during all movements, including emergency stops. Loads must remain within set positions during transport and transfer. Notable Updates in the 2023 Edition

The 2023 revision replaced the 2020 version with several technical enhancements: ISO 3691-4:2023(en), Industrial trucks

4. Legal and Insurance Compliance

In most industrialized nations, following harmonized standards like ISO 3691-4 provides a presumption of conformity with machinery directives (e.g., EU Machinery Directive 2006/42/EC). Without the official PDF, proving compliance during a legal audit or insurance claim is extremely difficult. ISO 3691-4:2023 is the current international safety standard

Summary: The Bottom Line

Investing $150–$300 in the correct standard is trivial compared to the cost of a safety violation, an accident investigation, or a failed compliance audit.

Disclaimer: This article is for informational purposes only and does not constitute legal or safety advice. Always consult with a qualified safety engineer and your local regulatory authority for specific compliance requirements.

Note: ISO standards are copyrighted documents. Therefore, this draft provides a comprehensive summary, structure, and implementation guide rather than the full verbatim text of the official standard. This content is suitable for use as a technical article, an internal company handbook, or a procurement guide.

1. Executive Summary

ISO 3691-4:2020 is the international safety standard specifying requirements for the design, verification, and validation of driverless industrial trucks (commonly known as Automated Guided Vehicles or AGVs, and Autonomous Mobile Robots or AMRs).

This document outlines the critical safety functions, hazard identification processes, and performance criteria required to ensure these vehicles operate safely in mixed environments where they may interact with humans and manned vehicles. ISO 3691-4 is essential for any driverless industrial

2. Risk Assessment Framework

ISO 3691-4 requires a formal risk assessment for each application. The PDF includes normative annexes that guide users through:

Q5: How often is ISO 3691-4 revised?

Typically every 5–7 years. The 2011 version was replaced in 2020. With the 2024 amendment, the next full revision is expected around 2027.

6. Information for Use (Clause 8)

The standard requires that the manufacturer provides specific documentation to the user:

Step 5: Periodic Inspection

After commissioning, clause 6.4 demands: