Modbus Temperature and Humidity Sensor.
The indoor sensors Sewi AQS/TH Modbus and Sewi TH Modbus measure the indoor temperature and humidity and also calculate the dew point temperature. The Sewi AQS/TH also records the CO2 concentration.
The devices are Modbus slaves with a RS485 interface and a RTU protocol. The Modbus master, such as PC, SPS or MC can read the Sewi Modbus Indoor Sensors measurement values with “Function 04h (Read Input Register)”.