Power supply for supplying a DALI system for up to 64 participants or 100 DALI loads (max. 200mA). The power supply is short-circuit proof and voltage-proof against 230/240V external voltage. The mains voltage is connected on the input side and the DALI control line on the output side. The connections are made via screw terminals. Device made of flame-retardant polycarbonate, halogen-free. Installation takes place in cable ducts or as a ceiling mount at a permissible ambient temperature of 0...50°C. Protection class IP20, dimensions: 101.5 x 29.5 x 51mm.