ISO 14119:2024 Compliance Requirements Explained
SN EN ISO 14119:2025
Sicherheit von Maschinen - Verriegelungseinrichtungen in Verbindung mit trennenden Schutzeinrichtungen - Leitsätze für Gestaltung und Auswahl (ISO 14119:2024)
Safety of machinery - Interlocking devices associated with guards - Principles for design and selection (ISO 14119:2024)
This document specifies principles for the design and selection (independent of the nature of the energy source) of interlocking devices associated with guards and provides guidance on measures to minimize the possibility of defeat of interlocking devices in a reasonably foreseeable manner. This document covers principles for the design, selection and application of the following: — parts of the guards which actuate interlocking devices; — trapped key interlocking devices and systems for machinery applications. NOTE ISO 14120 specifies general requirements for the design and construction of guards provided primarily to protect persons from mechanical hazards. The processing of the signal from the interlocking device to stop the machine and prevent unexpected start up is covered in ISO 14118, ISO 13849-1 and IEC 62061.
SN EN ISO 14119:2025 is a standard published by ISO that outlines the principles for designing and selecting interlocking devices associated with guards in machinery safety, applicable to all energy sources.
Purpose and objectives
The primary objective of SN EN ISO 14119:2025 is to enhance machinery safety by providing guidelines for the design, selection, and implementation of interlocking devices. These devices are crucial in preventing unauthorized access to hazardous areas of machinery, thereby reducing the risk of accidents and injuries. By establishing clear design principles and requirements, the standard seeks to ensure that interlocking devices function reliably and effectively, contributing to a safer work environment. Ultimately, the standard aims to facilitate compliance with machinery safety regulations and promote best practices in the design and engineering of safety-related components.
Scope: who must comply
SN EN ISO 14119:2025 applies to manufacturers, designers, and users of machinery across various industries, including mechanical engineering, electrical engineering, and the metal industry. Companies involved in the design and production of machinery that utilizes interlocking devices must adhere to these compliance requirements to ensure the safety of their equipment. Additionally, the standard is relevant in the context of Environment, Health & Safety (EHS) regulations, as it helps organizations fulfill their legal obligations to protect workers and comply with international safety standards. Typical organizations include machinery manufacturers, system integrators, and facility operators that implement safety measures in their operations.
How SN EN ISO 14119:2025 relates to other standards
SN EN ISO 14119:2025 is part of a broader framework of safety standards that includes:
- ISO 14120: This standard specifies general requirements for the design and construction of guards to ensure safety in machinery.
- ISO 14118: This provides guidelines for the use of protective devices in machinery, focusing on prevention of unintended start-up.
- ISO 13849-1: This standard outlines the safety-related parts of control systems, ensuring that they operate reliably in safety-critical applications.
Revision history and current status
The current revision of SN EN ISO 14119 was published in 2025. This update includes refinements in the design principles for interlocking devices and emphasizes the importance of preventing bypassing mechanisms. Enhanced testing procedures for compliance have also been introduced, reflecting advancements in technology and industry best practices. The revisions aim to ensure that the standard remains relevant and effective in promoting machinery safety across various applications.