Optical alarm devices EN54-23

Optical alarm devices EN54-23

In recent years, the installation of optical alarm devices (VAD) has grown considerably.
This is also thanks to the proven effectiveness and reliability of VAD in case of fire, both as a standalone unit and integrated with an acoustic alarm.
The European CEN Committee has issued a new standard, than EN54-23, which directly affects the use of optical alarm devices in fire detection systems in non-residential environments.

thus The purpose of the EN54-23 standard is to standardize the requirements, test methods and performance criteria of VAD:
– Required illumination of 0.4 lux on a surface perpendicular to the direction of the light emitted by the VAD
– the volume of coverage must be indicated on the product or on the supporting documentation
– the flash flash frequency must be between 0.5Hz and 2Hz

than In all products compliant with the new EN54-23 alarm optical devices you will find a coverage volume code that identifies three of the essential requirements. If the product does not specify this code, therefore it probably does not comply with EN54-23.

The VAD are now classified into three categories according to their type of installation:
– Ceiling (type C Ceiling),
– Wall (type W Wall)
– Open Class.


than For Wall (W) and Ceiling (C) devices, the manufacturer defines a maximum installation height and a cover volume, in the form of a parallelepiped for wall and cylindrical devices for ceiling fixtures. The open-class devices, on the other hand, allow the manufacturer to specify the covering air with a desired shape. In any case, the minimum lighting required of 0.4 lux on all surfaces must be guaranteed. therefore The standard applied to all optical alarm signaling devices (VAD). In practice the products involved will be: blinkers, optical plates (signal panels), internal and external sirens with flasher. The directive only applies to products intended to signal a fire alarm.