Serial server concept
In the Internet of Things, everyone must be familiar with the word serial port server. However, the concept of this product is explained clearly on the Internet. There are not many. I happened to see an article on the Internet that explains the concept of serial port server clearly, as follows. :
The serial port server parses the data packets from the TCP/IP protocol into a serial port data stream; conversely, the serial port data stream can be typed into TCP/IP protocol data packets to achieve network transmission of data. It can connect multiple serial port devices and select and process serial port data streams, converting existing TTL port or RS232/RS485/RS422 interface data into IP port data, so that traditional serial data can be sent to It can connect popular IP channels without prematurely eliminating the original equipment without Ethernet modules, thus improving the utilization of existing equipment, saving investment and simplifying wiring.
In terms of data processing, the serial port server completes a connection-oriented TTL serial port or. Storage control of communication data between RS232/RS485/RS422 links and connectionless Ethernet. The system processes various data, processes the serial port data stream from the serial port device, and performs format conversion to make it available on the Ethernet. Data frames transmitted in the network; it judges the data frames from the Ethernet and converts them into serial data and sends them to the responding serial device. In terms of practical application, the server completes the mapping of the Ethernet interface of the TCP/IP protocol to a standard serial port under the Windows operating system. The application program can send, receive and control it like an ordinary serial port. For example, a general computer has two Serial ports COM1 and COM2 can be mapped to COM3, COM4, COM5, etc. through the serial port server.
For serial port servers, the two keywords are serial port and network. Networks are divided into two types: intranet and external network. The internal network generally refers to Ethernet, and the external network refers to the Internet. It is an effective means of global communication. Before the popularity of the Internet, data exchange between equipment and computers was generally achieved through simple RS232; if long-distance transmission was required, RS485 could also be used (up to more than 1,000 meters).
The role of the cross-product server
Serial port server can reduce your work instead of increasing your workload. First of all, a high-quality serial port server will have a “friendly management interface”. These large numbers of serial port devices may be scattered in different remote locations. Therefore, it is an important indicator that a high-quality serial port converter can use a single interface to complete all settings, whether it is used Windows software, Web or Telnet. High performance and low latency, in some traditional serial port transmission applications, 115.2Kbps is enough. However, if you want to switch to 100M interface converter communication, the speed of the embedded device module is higher than 230.4kbps, which will be more guaranteed.
The serial server can connect traditional RS-232/422/485 devices to the Internet immediately. The serial device networking server is like a microcomputer containing a CPU, real-time operating system and TCP/IP protocol, transmitting data between serial ports and network devices. Using the serial port server, you can use your computer to access, manage and configure remote devices through the network from anywhere in the world. Allow electrical equipment with only serial interfaces, such as POS, ATM, display screens, keyboards, card machines, card readers, switches, minicomputers, fuel dispensers, RTUs, CNC machine tools, test instruments, etc., to easily connect the microcomputer protection device to the Ethernet network to realize network management and remote control.
The above is the relevant explanation of ” Serial Server Concept ", ich hoffe, es wird Ihnen helfen!