Controller for surface heating 8 control areas with up to 4 thermal actuators each 230 V or 24 V (with external power supply), outputs 1 × 230 VAC, 2 × potential-free, 2 x 0-10 V or PWM, 1 × PWM, 1× 24 VDC / max. 12 W, CAN bus private for max. 8 Room Controller, 1-Wire bus for max. 20 temperature sensors and Room Sensors (including max. 8 LEDcontroller), CAN bus building for several residential units, 14 LEDs for status indication, real time clock with power reserve > 24 h, white casing RAL 9003 with transparent cover, dimensions 90 × 303 × 57 mm (h × w × d), protection class IP20, delivery incl. top-hat rail and spare fuses