ISO 7240-1:2025

Overview

ISO 7240-1:2025 - "Fire detection and alarm systems - Part 1: General and definitions" establishes the standardized terms, definitions and functional descriptions used across the ISO 7240 series for fire detection and alarm systems (FDAS). Intended for FDAS installed in and around buildings, this fourth edition harmonizes vocabulary and describes the functions carried out by FDAS components so that designers, manufacturers, installers and authorities consistently interpret requirements across the series. (Devices covered by ISO 12239 are excluded.)

Key topics and technical scope

ISO 7240-1 does not prescribe performance test methods itself; instead it provides the foundational terminology and functional concepts used throughout the ISO 7240 series. Key topics and defined items include:

• Core terminology: e.g., detector, component, control and indicating equipment (CIE), detection circuit, point, zone, and transmission path.
• Device types: addressable device/point, conventional detector, analogue detector, aspirating smoke detector, combination detector, detachable detector.
• Alarm and signalling: alert signal, evacuate signal, audible alarm device, A-weighted sound pressure level.
• System functions: detection signal, detector response, alarm concept, detection concept, fault warning routing and receiving.
• Operational and safety concepts: commissioning, compatibility, competent person, emergency management and evacuation plans, end-of-line devices, emergency microphone.
• Support and ancillary items: ancillary equipment/functions, building management system interface, cabinet, final voltage (battery), earth fault.
• Cross-references to terminology resources (ISO Online Browsing Platform and IEC Electropedia) and normative alignment with other parts of ISO 7240 and relevant IEC standards (e.g., IEC 61672‑1 for A-weighting).

Practical applications

ISO 7240-1:2025 is a reference document used to:

• Ensure consistent specification and procurement language for FDAS components and systems.
• Support system design and integration by clarifying functional roles (e.g., CIE vs. sound system control).
• Improve interoperability and compatibility assessment when combining components from different suppliers.
• Aid commissioning, inspection, maintenance and staff training by standardizing terms used in documentation and procedures.
• Help authorities having jurisdiction, consultants and facility managers interpret requirements across the ISO 7240 family.

Who should use this standard

• Fire safety engineers and system designers
• Manufacturers and product developers of detectors, alarm devices and CIEs
• Installers, commissioning agents and maintenance providers
• Building owners, facility managers and safety officers
• Regulators, specifiers and authorities having jurisdiction

Related standards

• Other parts of the ISO 7240 series (performance, testing, installation and servicing)
• ISO 7240-13 (compatibility of system components), ISO 7240-14 and ISO 7240-19 (post-installation testing) - referenced for system-level assessment
• ISO 12239 (excluded device coverage)
• IEC standards such as IEC 61672‑1 (A‑weighting) and IEC Electropedia for terminology

Keywords: ISO 7240-1, fire detection and alarm systems, FDAS, definitions, control and indicating equipment, detectors, commissioning, compatibility.