Overview
ISO 7240-23:2013 is the International Standard that specifies requirements, test methods and performance criteria for visual alarm devices (V.A.D.) used in fixed installations of fire detection and alarm systems. It applies to pulsing or flashing visual alarm devices (for example xenon beacons or rotating beacons) intended to signal a visual warning to occupants in and around buildings. The standard is not applicable to devices giving continuous light output or to small visual indicators on detectors and control equipment.
Key topics and technical requirements
- Scope and application: Covers fixed visual alarm devices for buildings and surrounding areas; focused on pulsing/flashing devices only.
- Device classification:
- Mounting classes: Class C (ceiling), Class W (wall), Class O (manufacturer-specified/open).
- Environment types: Type A (conditioned indoor), Type B (unconditioned indoor/outdoor), Type C (harsh environments, e.g., mining).
- Performance metrics:
- Coverage volume based on measured light distribution in a surrounding hemisphere.
- Required illumination: defined as 0.4 lm/m on a surface perpendicular to emitted light.
- Minimum/maximum effective luminous intensity, light colour, flash pattern and frequency.
- Variation of light output over time (self‑heating and stability) is tested.
- Construction and durability: Requirements for mechanical and climatic robustness including shock, impact, vibration and corrosion resistance.
- Environmental and EMC testing: Climate (dry heat, cold, damp heat), sulfur dioxide corrosion, IP enclosure protection (IEC 60529) and electromagnetic immunity (EN 50130-4) are included.
- Additional functions: Requirements for software‑controlled devices and optional synchronization features.
- Testing and reporting: Detailed test procedures and annexes (light distribution measurement, comparative output, test chamber, flammability comparison).
Practical applications and users
ISO 7240-23 is used by:
- Manufacturers designing and certifying visual alarm devices (xenon/rotating beacons).
- Fire safety engineers and specifiers selecting appropriate V.A.D. for buildings and hazardous sites.
- Installers and system integrators ensuring correct mounting class, coverage volume and mode settings.
- Testing laboratories and certification bodies performing conformity and environmental tests.
- Building owners and authorities verifying compliance with fire detection and alarm system requirements.
This standard helps ensure reliable visual signalling for occupant warning, consistent coverage, durability in expected environments, and compatibility with broader fire alarm system design.
Related standards
- ISO 7240-1 (General and definitions)
- IEC 60068 series (environmental testing)
- IEC 60529 (IP Code – enclosure protection)
- EN 50130-4 (EMC immunity)
- UL 94 / IEC 60695 (flammability test references)
