VDE 0833-2. The components are largely harmonized in the EN 54 series of European standards. For example, EN 54-3 (audible signaling devices) and EN 54-23 (visual signaling devices) stipulate the requirements [...] alarm systems The provisions of the standard for visual signaling devices in fire alarm systems, DIN EN 54-23, are legally binding in Germany. The publication of the revised design and project planning standard [...] signaling device and Pfannenberg Xenon flashing light PYRA ® The standard for visual signaling devices, EN 54-23, came into force in the Member States of the European Union on 1 January 2014. It will no longer