In most European countries EN 54-23 will take effect in 2013 for visual signaling devices.
Because of that all visual signaling devices will lose their certifications and may no longer be used for new installations. In particular, all visual signaling devices which have not conformed to EN 54-23 by 1. March 2013 lose VdS approval.
Pfannenberg is the first manufacturer to offer beacons that are certified according to both the new standard and VdS:
The flashing light PY X-S-05 and the combined visual-audible device PA X 1-05 are available in the standardized lens colors red and clear. He mounting position of the flashing light is freely selectable. This allows a flexible installation and reduces significantly the number of required signaling devices.
Acoustic "smog" is just one factor that makes it more difficult to perceive and correctly interpret an alarm signal. According to estimates of the World Health Organisation from 2005, 278 million people throughout the world are affected by hearing impairments varying from minor to severe. For this reason and in view of not discriminating against disabled people (in Germany and other countries this is regulated by the Equal Opportunities for People with Disabilities Acts), visual signaling devices are increasingly being used as a supplement to audible signals. In order to guarantee the required equality and thus ensuring that everyone has easy access to all areas, an alerting of at least 2-senses is necessary (e.g. in accordance with DIN 18040-1, chapter 4.4). Therefore, visual alerting is required in addition to the audible kind. This does not only apply to fire alarm systems but also for alerts through house alarm systems or hazard warning systems.
Using an additional visual alarm also applies in environments with very high noise levels where a safe perception of the audible signal is not always assured. While a regulation for such devices has been in effect for a long time in the American market in NFPA 72, there were no technical rules that prescribed the capability of optical devices in Europe. This has now changed. In many cases of alarms in which up to now solely an audible signal has been installed, an additional visual signal must be used. With the EN 54-23 taking effect, demands are also being made regarding the light output and light distribution.
An illumination of min. 0.4 lux (lm/m²) is required over the entire coverage volume, i.e. the space in which the alarm signal is to be effective (e.g. production facilities).
The visual signaling device must emit white or red flashing light.
The flash rate must be between 0.5 Hz and 2 Hz.
Visual alarm devices must meet the requirements for the coveragevolume in at least one of the following three categories: ceiling mounted signaling device C; wall mounted signaling device W; or O for signaling devices for which the mounting position is freely selectable.
In order to achieve this, the light intensity of the signaling device must be significantly higher than those used in the past. This also entails an increased power consumption.
Devices from category C are described with the specification C-x-y. “x” stands for the measured maximum installation height in meters (m) at which the signaling device may be placed. Whereas “y” specifies the diameter of the cylindrical coverage volume. Besides the specification of the cylindrical signaling space the devices are only classified for heights up to 3 to 6 or up to 9 m.
For example: C-3-7.5. stands for a ceiling mounted signaling device with a cylindrical coverage volume of 7.5 m diameter and a maximum mounting height of 3 m.
Category W devices are described with W-x-y. “x” stands for the maximum height of the signaling device on the wall specified in meters (m) with a minimum installation height of 2.4 m. “y” describes the square base area of the square coverage volume.
For example: W-2,4-8 stands for a wall mounted signaling device with a cuboid coverage volume of 2.4 m x 8 m x 8 m, if mounted at a height of 2.4.
For category O devices the shape of the coverage volume and the mounting position of the signaling device is open. This means there are no restrictions on the formation of the coverage volume. From the user's perspective this is the most flexible and economical solution, because there is no need to differentiate between ceiling and wall installation (minimisation of inventory) and the greatest possible coverage volume of the signaling device is achieved.
The signaling device can be optionally mounted on the ceiling, wall or another position, whereas category C and W devices are only allowed to be mounted according to their classification.
As an example, a room of 20 m length, 8 m width and 3 m height is to be signalled. Planning with the following three devices is compared:
Please find here a sample for a possible cost calculation