Serial to Ethernet Device Server is a common device in the Internet of
Things, which is mainly used for the conversion of serial devices and network
devices. It must be familiar to friends engaged in the industrial Internet of
Things. So what exactly is Serial to Ethernet Device Server?
Before understanding Serial to Ethernet Device Server, we need to
understand what serial port.
Serial port, also known as serial data interface, is mainly used to
represent the transmission of various data communication interface, usually
refers to the com port. It is generally divided into RS232, RS422 and RS485.
RS232 interface: full-duplex transmission is adopted, and the transmission
distance is about 15 m.
RS422 interface: full-duplex transmission is adopted, and RS422 cable is
composed of R +, R-, T +, T- and GNDA. The maximum transmission distance is 1200
m.
RS485 interface: developed on the basis of RS422, half-duplex, two-wire
transmission mode, consisting of two wires A and B, with the maximum
transmission distance of about 1800 m.
Network port: also called "RJ45 interface" or "network data connection
interface". Through the RJ45 network port, data can be transmitted in the
LAN.
Serial to Ethernet Device Server is a conversion device, which can convert
local serial data interfaces such as RS232/485/422 into network data interfaces
with TCP/IP protocol, so that a serial device can achieve long-distance data
transmission. The communication distance of the serial port equipment is
expanded, and the method can also be used for remote control and remote
management of equipment.
The emergence of Serial to Ethernet Device Server has brought great
convenience to many fields that need remote control, data transmission and
monitoring. With Serial to Ethernet Device Server, users can use the Internet to
connect computers anywhere in the world to store, manage and remotely control
machines and devices.
I. Classification of Serial to Ethernet Device Server
Serial to Ethernet Device Server is generally divided into single serial
port, double serial port, four serial ports, eight serial ports, sixteen serial
ports and so on according to the access quantity of different serial devices;
According to the type of serial port, it is divided into RS485 Serial to
Ethernet Device Server, RS232 Serial to Ethernet Device Server, RS422 Serial to
Ethernet Device Server;According to different product forms, it can be divided
into pin type Serial to Ethernet Device Server, patch type Serial to Ethernet
Device Server, Device-level Serial to Ethernet Device Server is used to adapt to
various application scenarios.
II. Advantages of Serial to Ethernet Device Server
The Serial to Ethernet Device Server provides the following benefits:
1) Extend the communication distance of serial devices. Through the Serial
to Ethernet Device Server, the serial device can immediately have the TCP/IP
network interface function to connect the network for data communication, thus
expanding the communication distance of the serial device.
2) Provide remote control and data transmission functions. With Serial to
Ethernet Device Server, users can use the Internet to connect computers anywhere
in the world to store, manage and remotely control machines and devices.
3) that data transmission efficiency is improve. Serial to Ethernet
Device Server can convert the serial device into TCP/IP network interface to
realize bidirectional and transparent data transmission, thus improving the
efficiency of data transmission.
4) Support virtual serial port protocol. Serial to Ethernet Device Server
can support virtual serial port protocol, so users do not need to change the
original PC software.
III. Usage of Serial to Ethernet Device Server
1. Device connection
Generally, the Serial to Ethernet Device Server interfaces are serial ports
(mostly RS485), network ports (generally RJ45 specifications), and power
interfaces (generally with different power supply ranges). Connect the serial
port cable, network cable and power supply of Serial to Ethernet Device Server
in turn. The network cable can be connected to the switch, router, computer,
etc.
2. Basic parameter configuration
The parameters of Serial to Ethernet Device Server can be modified through
Web page, AT command and parameter configuration software. Generally, the
parameters to be configured are composed of serial port parameters and network
parameters.Serial port parameters include baud rate, data bit, stop bit, check
bit, etc. The network parameters are typically IP address, gateway, operating
mode, server address, port, and so on.
IV. Field of application
Serial to Ethernet Device Server provides the function of converting serial
port to network, which can convert serial port data into TCP/IP protocol data
and realize bidirectional and transparent transmission between serial port and
network. It is widely used in access control/attendance, industrial automation,
parking lot management, remote monitoring, charging piles, high-speed toll
stations and other fields.
1. Unattended weighing: The Serial to Ethernet Device Server can be used to
connect weighing instruments, receipt printers, gates and other weighing
equipment to the LAN, and a LAN computer can be used to complete centralized
control and data statistics management.
2. Remote attendance: The attendance machine plus the Serial to Ethernet
Device Server can transmit the attendance data to the server, which is very
convenient for the attendance statistics of offices all over the country.
3. Remote control PLC: Serial to Ethernet Device Server is added to the
PLC, and the programming software is combined with the virtual serial port, thus
realizing the remote programming of the PLC.
Serial to Ethernet Device Server can also be used in new energy, power,
intelligent transportation, intelligent manufacturing, environmental monitoring,
petrochemical and other industries.
