A6V11519429_en--_a2019-01-28Room operator unitsPOS8.4420/109; POS8.4440/109Communicating room operator units with KNX PL-Link.● Measurement of room temperature (POS8.4420/109)● Measurement of room temperature and humidity (POS8.4440/109)● Keys to adjust the room temperature setpoint, ventilation, domestic hot water,scheduler settings depending on the controller application● LCD display of room temperature, operating modes, humidity (only forPOS8.4440/109), scheduler, notification, and clock setting● Operation with 8 pushbuttons● 2-wire interface to the controller via KNX PL-Link● Power supply of the room operator unit via KNX PL-Link● Backlit LCD display