Cellular wireless terminals are data transmission terminal products developed based on wireless cellular networks. Its function is to transmit some simple data. A typical application is to transmit sensor data to the host computer (server) through a cellular wireless terminal. Another way to describe its role is as a wireless terminal device used to convert serial port data into IP data or convert IP data into serial port data and transmit it through a wireless communication network. Later, the pronouns for application terminal products in the wireless communication industry were collectively referred to as ” DTU “. It is widely used in remote meter reading, power management, smart agriculture, hydrological monitoring, automated production, and other fields.
Cellular Wireless Terminal Products
 | 4G DTU industrial grade wireless data transmission terminal Serial port: 1RS485, 1RS232, 1AI ZHC4012 is a data transmission product. Compared with traditional DTU, it has more functions. “The product supports active collection of sensor data” and is also Modbus RTU /TCP adaptive. The cloud platform is provided for free after purchase! |
 | 4G RTU (ZHC4931) network IO controller Serial port: 1RS485, 1RS232, 1DO, 2DI ZHC4931 is an industrial-grade 4G RTU that provides 1 serial port (RS485/RS232), 2 DI, 1 DO and 1 AI interface. It supports local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptive, Features include automatic calibration threshold reporting, configuration software docking, and wet and dry node IO detection. |
 | 4G RTU (ZHC4661) analog data transmission terminal Serial port: 1RS485 4AI 2AO ZHC46612 AO and 1 RS485 interface support Modbus RTU/TCP adaptive, automatic collection and active reporting, 4~20mA analog control collection, automatic calibration threshold reporting and other special functions. It supports one-to-one and many-to-one networks. |
 | 4G RTU (ZHC4921) network relay Serial port: 4DI, 4DO, 4AI, 1RS485 ZHC4921 is an industrial-grade 4G RTU that provides 4 channels of DI, 4 channels of DO, 4 channels of AI and 1 channel of RS485 interfaces. It supports local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptation, automatic calibration threshold reporting, Configuration software docking, dry and wet node IO detection and other special functions. |
 | 4G RTU (ZHC4922) supports MQTT Serial port: 4DI, 4DO, 4AI, 1RS485 ZHC4922 is an industrial-grade 4G RTU that provides 4 channels of DI, 4 channels of DO, 4 channels of AI and 1 channel of RS485 interfaces. It supports local logic processing operations, automatic collection and active reporting, MQTT RTU/TCP adaptation, automatic calibration threshold reporting, Configuration software docking, dry and wet node IO detection and other special functions. |
 | 4G RTU (ZHC4941) 16-channel IO network controller Serial port: 8DO, 8DI, 8AI, 485, 232 ZHC4941 is an industrial-grade 4G RTU that provides 8 DI, 8 DO, 8 AI and 1 RS485/232 interfaces. It supports local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptation, and automatic calibration thresholds. Reporting, configuration software docking, dry and wet node IO detection and other special functions support one-to-one and many-to-one networks, and the configuration software interface window is visualized |
What are the cellular networks?
Cellular network (English: Cellular network), also known as mobile network, our common cellular networks include GPRS (2G), CDMA (3G) 4G, FDMA, PDC, TDMA and NB-IOT this year. Composition of cellular network: The composition of cellular network mainly consists of the following three parts: mobile station, base station subsystem, and network subsystem.
Why is it called a cellular network?
Because the signal coverage of each communication base station that forms the network coverage is hexagonal, the entire network is named after it resembles a honeycomb. Honeycombs are usually represented by regular hexagons. Why a regular hexagon and not a circle? Among polygons whose vertices are equidistant from the geometric center, the possible geometric shapes that can cover a certain area completely (without overlap) are: square, equilateral triangle and regular hexagon. Among squares, equilateral triangles, and regular hexagons, the regular hexagon has the largest area.
French 
English 
Russian 
German 
Spanish 
Italian 
Portuguese 
Dutch