Audio entry system and/or supplementary power module for X1/XIP systems. Plastic housing, for installation in electrical control panels (EN50022). Dimensions: 4 low-profile DIN modules. Protection rating IP30. Complete circuit board for power supply to entry panels and receivers (18V DC – 1A max). Electronic circuit-breaker for protection against overloads/short-circuits. Terminals for control of riser bus. Fitted with terminals for connection of the device power supply modules. Powered by mains circuit 230V AC 50/60 Hz.