The DTU wireless data transmission terminal series product adopts GPRS/4G/NB-IoT communication technology and utilizes existing network resources to provide users with a device with good anti-interference, powerful functions, simple and easy to use, low operating cost, and Lower cost wireless data transmission terminal equipment .
DTU wireless data transmission terminal core functions
1. Provide bidirectional conversion function of serial port data
DTU provides serial communication interfaces, including RS232, RS485, etc., which are commonly used serial communication methods, and most of DTU designs serial port data in a “transparent conversion” method, which means that DTU can convert the original data on the serial port. Data is converted into TCP/IP packets for transmission without changing the original data communication content. Therefore, DTU can be connected to various user equipment that uses serial port communication, and there is no need to make changes to the user equipment.
2. Internally integrated TCP/IP protocol stack
DTU internally encapsulates the PPP dial-up protocol and TCP/IP protocol stack and has an embedded operating system. From a hardware perspective, it can be regarded as a combination of an embedded PC and a wireless MODEM; it has the functions of dial-up Internet access and TCP/IP data communication .
3. Support parameter configuration and permanent storage
As a communication device, DTU has a wide range of applications. In different applications, the IP address and port number of the data center, the baud rate of the serial port, etc. are different. Therefore, the DTU should support parameter configuration and save the configured parameters in an internal permanent storage device (usually FLASH or EEPROM, etc.). Once powered on, it will automatically work according to the set parameters.
4. Support automatic heartbeat and remain permanently online
One of the advantages of the GPRS communication network is that it supports terminal devices to be permanently online. Therefore, typical DTUs are designed to support the permanent online function. This requires the DTU to include automatic dialing on power-on and the use of heartbeat packets to remain permanently online (when there is no data for a long time). During communication, the mobile gateway will disconnect the DTU and the center. The heartbeat packet is a small data packet sent by the DTU and the data center before the connection is disconnected to keep the connection from being disconnected). It supports automatic reconnection after disconnection and automatic Redial and other features.
The DTU wireless data transmission terminal series products developed and produced by Zongheng Intelligent Control adopt industrial-grade design, have strong anti-interference, are stable and reliable, plug and play, and can be quickly connected to RTU , PLC, industrial computers and other equipment, and will be connected to RTU, PLC, industrial computers and other equipment through the operator network. The data of user equipment connected to the module is transmitted to the Internet to realize transparent transmission of remote data; it can be widely used in meteorology, environmental protection, water conservancy, industrial control, power meter reading, street light monitoring, road transportation and other industries.