ISO 14119-2024 PDF

Full title and description

Safety of machinery — Interlocking devices associated with guards — Principles for design and selection. This International Standard gives principles for the design, selection and application of interlocking devices associated with guards, and guidance to minimise the possibility of defeat in reasonably foreseeable situations.

Abstract

ISO 14119:2024 specifies principles for the design and selection (independent of the nature of the energy source) of interlocking devices associated with guards. It covers parts of guards that actuate interlocking devices and trapped‑key interlocking devices and systems for machinery applications, and provides guidance on measures to reduce the risk of defeat. The document notes related requirements for signal processing and safety functions found in ISO 14118, ISO 13849‑1 and IEC 62061.

General information

• Status: Published.
• Publication date: September 2024 (Edition 3 published 2024).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.110 (Safety of machinery).
• Edition / version: Edition 3 (2024).
• Number of pages: 106 pages.

Scope

ISO 14119:2024 applies to interlocking devices associated with guards on machinery and provides principles for their design, selection and application. It addresses mechanical and trapped‑key systems and the guard parts that actuate interlocks, and gives guidance to minimise foreseeable defeat of such devices. It does not replace standards that cover processing of safety signals or performance‑level calculations (see related standards).

Key topics and requirements

• Principles for design and selection of interlocking devices associated with guards, independent of energy source.
• Requirements for parts of guards that actuate interlocking devices and considerations for mechanical integrity and mounting.
• Guidance on trapped‑key interlocking devices and system application for machinery.
• Measures to minimise the possibility of defeat (foreseeable misuse, tampering, bypassing) and recommendations for protective measures and verification.
• Cross‑references to signal processing and safety function standards (ISO 14118, ISO 13849‑1, IEC 62061) for stopping and prevention of unexpected start‑up.

Typical use and users

Used by machine designers, safety engineers, OEMs, integrators, conformity assessors and competent persons responsible for machine safeguarding. Typical applications include production machinery, processing equipment and any guarded machinery where interlocking devices are used to protect personnel and control access during hazardous operations. Buyers and publishers of standards (national standards bodies and commercial distributors) also reference this standard for procurement and compliance.

Related standards

Key related standards include ISO 14120 (guards — general requirements), ISO 14118 (prevention of unexpected start‑up), ISO 13849‑1 (safety‑related parts of control systems) and IEC 62061 (safety of machine control systems). ISO 14119:2024 replaces ISO 14119:2013.

Keywords

interlocking devices; guards; trapped‑key systems; machinery safety; defeat prevention; safeguarding; ISO 14119; safety standards; design principles.

FAQ

Q: What is this standard?

A: ISO 14119:2024 is an International Standard that sets out principles for the design, selection and application of interlocking devices associated with guards on machinery to reduce the risk of defeat and improve safeguarding.

Q: What does it cover?

A: It covers parts of guards that actuate interlocking devices, trapped‑key interlocking devices and system considerations for machinery. It provides guidance to minimise foreseeable defeat and points to other standards for safety‑related control and signal processing.

Q: Who typically uses it?

A: Machine manufacturers (OEMs), safety and design engineers, integrators, maintenance personnel, safety assessors and regulatory/compliance professionals use this standard to specify and assess interlocking and guarding solutions.

Q: Is it current or superseded?

A: Current — ISO 14119:2024 (Edition 3) was published in September 2024 and replaces ISO 14119:2013 (withdrawn).

Q: Is it part of a series?

A: It is part of the suite of ISO standards addressing machine safeguarding (for example ISO 14120, ISO 14118) and is commonly used alongside control‑safety standards such as ISO 13849‑1 and IEC 62061.

Q: What are the key keywords?

A: Interlocking, guard, trapped‑key, defeat prevention, machinery safety, safeguarding, ISO 14119.