Heating actuator Basic, 6-gang for KNX DRA plus Features: Heating actuator for switching thermal servos for heating or cooling ceilings. Control using 1-bit or 1-byte corrected variable telegrams. For 1-byte correcting variables, the outputs are controlled by pulse width modulation (PWM). Servos with the characteristic "de-energised open" or "de-energised closed" can be controlled. Servos can be activated with rated voltage 24 V or 230 V. Overload protected, short-circuit protected. Standard protection. Feedback via bus e.g. for overload and short circuit. Switching the heating circuit pump (standard functions). Passive group feedback of the closed servos. Notes : Valves with the same operating voltage must be connected at all outputs. VDE approval in accordance with EN 60669-1, EN 60669-2-1. Installation on DIN top-hat rail.