Product adopts industrial-grade chip, high-precision SHT20 temperature and humidity sensors, with good reliability, high precision, and interchangeability. Adopts RS485 hardware interface with protection design; the protocol layer is compatible with the standard industrial Modbus RTU protocol. This product integrates Modbus protocol and ordinary UART communication protocol. Users can choose the communication protocol. UART communication supports automatic report function (automatically outputs temperature and humidity data through the RS485 serial interface mode tool). Installation Steps: 1. Connect signal receiver such as PLC to RS485 terminal. 2. Input power supply at terminal. 3. According to the acquired data, process the data based on actual needs. Notes: 1. Users need to prepare their own ModBus debugging tool and RS485 debugger. 2. Users need to complete the code writing according to the communication protocol and commands when using the controller to receive data. Features: 1. Supports Modbus RTU protocol 2. RS485 supports communication up to 1000 meters 3. Standard DIN35 mounting rails 4. High precision 5. Industrial product with high-precision SHT20 temperature and humidity sensor and RS485 communication 6. Supports both standard Modbus protocol and ordinary protocol; user can select the communication protocol 7. Adjustable baud rate 8. General protocol with automatic upload function; upload speed can be adjusted Parameters: 1. Product Name: Modbus RTU RS485 SHT20 Temperature Humidity Transmitter 2. Working Voltage: DC 5V~30V 3. Output Signal: RS485 signal 4. Communication Protocol: Modbus RTU and ordinary protocol 5. Communication Address: 1~247 (default 1) 6. Temperature Range: -40C ~ 60C 7. Temperature Precision: 0.5C 8. Temperature Resolution: 0.1C 9. Humidity Range: 0%RH ~ 80%RH 10. Humidity Precision: 3%RH 11. Humidity Resolution: 0.1%RH 12. Power Dissipation: less than 0.2W 13. Operating Temperature: -40C ~ 85C 14. Operating Humidity: 0% ~ 95%RH 15. Size: 65 x 46 x 28.5mm Condition: New Type: Logic ICs Color: White Material: Plastic Application: Temperature Humidity Transmitter Additional Features: RS485 supports communication up to 1000 meters Application Scenarios: 1. Factory monitoring 2. Equipment box monitoring 3. Environmental testing 4. Home security Package Contents: 1 x Temperature and Humidity Sensor Only the above package content is included; other products are not included. Note: Lighting and display differences may cause slight color variation between the item in the picture and the actual product. Measurement allows an error of +/- 1-3cm.