Using Steps: 1.Connect signal receiver such as for to RS485 terminal.2.Input power supply at power terminal. 3.According to the acquired data, the data is processed differently according to actual needs. Note: 1.Users need to prepare their own ModBus debugging tool and RS485 debugger. 2.Users needs to complete write code according to the communication protocol and commands if using the controller to receive data. This product integrating MODBUS protocol and ordinary UART communication protocol, users can choose communication protocols, UART communication support automatic report function (Connect the RS485 serial interface mode tool by automatically output temperature and humidity). Description: Product adopts industrial-grade chip, high- SHT20 temperature and humidity sensors, the products with good reliability, high and interchangeability. Adopt RS485 hardware interface (with the protection design), the protocol layer compatible with standard industrial Modbus RTU protocol. Features: 1.Support MODBUS RTU protocol. 2.RS485 supports 1000 meters communication. 3.Standard DIN35 mounting rails. 4.High . 5.Industrial products, high progress SHT20 temperature and humidity sensor, the RS485 communication. 6.Standard MODBUS protocol and ordinary protocol, the user can choose communication protocol. 7.Baud rate can decide for themselves. 8.General agreement with automatic upload function, upload speed can decide for themselves, Weight: 0.09038952742 Pounds, Manufacturer: Transail