SIEMENS RDU340 Flush-mount room thermostat for rectangular conduit box with LCD for VAV application Output for a DC 0…10 V actuator and AC 230V electrical heater (ON-OFF) 2 multifunctional inputs for keycard contact, external room / return air temperature (QAH11.1, QAA32), heat / cool changeover, operation mode changeover, window contact on/off, dewpoint monitor, electrical heater enabled, fault contact Operating modes: Comfort, Energy Saving and Protection Modulating PI control Control depending on the room or the return air temperature Automatic or manual heating/cooling changeover Adjustable commissioning and control parameters Minimum and maximum setpoint limitation Adjustable minimum and maximum limitation for air flow signal DC 0...10V Output signal inversion as an option Mounting on recessed rectangular conduit box, 60.3 mm fixing centers Application selectable: Single-duct system Single-duct system with electrical heater