With the improvement of industrial automation level, more and more devices need to be connected to the network.O as to facilitate operations such as data acquisition, remote control and the like.In the field of industrial control, the commonly used networking mode is serial port, and RS485 interface is the main mode.RS485 interface has the characteristics of fast transmission speed, long transmission distance and strong anti-interference ability.Therefore, it is widely used in various industrial control equipment.
However, it is not a simple matter for devices to connect to the network.In practical applications, we will find that there are many problems when the serial port is connected to the network, such as data loss, communication instability and so on.In order to solve these problems, a new type of device, Ethernet to Serial Converter, has come into being.From The point of view of Ethernet to Serial Converter, the RS485 wiring method for connecting serial devices to the network is comprehensively analyzed.Create an efficient and stable device connection network for you.
Ethernet to Serial Converter is a device that can transmit serial data through the network.The serial port interface can transmit data to a remote server through a TCP/IP protocol,It is convenient to monitor, manage and maintain the equipment.The use of Ethernet to Serial Converter can realize the data exchange between the intelligent equipment and the computer,The problem of equipment data interaction is solved,It is widely used in industrial automation control, building automation, energy management and information security.
RS485 is one of the most commonly used serial communication standards, which supports multi-receiver and multi-transmitter serial communication protocols.It supports a larger transmission distance up to 1200 meters, and has the characteristics of high transmission rate and strong reliability.RS485 interface is a linear bus interface, which can connect multiple devices to transmit data together in the form of bus.It is suitable for long distance transmission and high noise immunity.
In the RS485 interface, we need to use three cables, namely the A wire, the B wire and the ground wire.Among them, the transmission distance of A and B lines depends on the speed and transmission quality of the signal, usually up to 1200 meters.
The RS485 interface uses differential signal transmission, so a converter is required to convert the UART of a single port to a differential port.The RS485 interface provided on the Ethernet to Serial Converter is equipped with such a converter and can be used directly.However, before using the Ethernet to Serial Converter, it is necessary to judge the docking condition of the 485 interface of the device.To ensure proper wiring.
When wiring 485, we need to pay attention to several problems, such as polarity, insulation, voltage and so on.Among them, polarity is the most common problem.Because RS485 is a differential signal with polarity, it is necessary to ensure that the two wires A and B are connected correctly.
The application scenarios of Ethernet to Serial Converter mainly involve the following three aspects:
Ethernet to Serial Converter provides the function of remote control. By connecting to the Internet, you can control the equipment located at the remote end.For example, in a power station, if a device fails, if there is no Ethernet to Serial Converter,Personnel have to go to the scene to operate, which is time-consuming and laborious.With Ethernet to Serial Converter, you only need to operate through APP or web page without going to the site.
In many industrial scenarios, it is necessary to collect and store data from a large number of devices, and through Ethernet to Serial Converter,The data collected by each device can be transmitted to the background database or cloud storage for subsequent data analysis and processing.
Ethernet to Serial Converter transmits data between devices to the remote end, allowing the remote end to monitor the data.In order to keep track of device status in real time.For example, in a wind farm, the status of wind turbines is monitored via the Ethernet to Serial Converter.Faults can be found and handled in time to avoid damage to power generation and equipment.
Through the use of RS485 interface by Ethernet to Serial Converter, intelligent manufacturing and automatic management can be realized.Thereby greatly improving the engineering efficiency and the service life of the equipment.Therefore, only by fully mastering the Ethernet to Serial Converter and 485 interface technology,Only in this way can we control and manage industrial equipment more flexibly and intelligently.
