1. History of Serial Ports First of all, the serial port is an essential tool for anyone working with hardware and embedded software, especially when debugging a system with an MCU or CPU. During the debugging process, the first thing we usually do is to light up the GPIO, and the second is to establish … Read more
A serial port (COM port) is a general term, UART is a protocol, and TTL/RS-232/RS-485 are voltage standards. Data using the UART protocol is transmitted through TTL (board-level short distance), RS-232 (± voltage anti-interference), or RS-485 (differential long distance multi-device) voltage standards, while COM port is the name given by Windows to this type of … Read more
In the field of industrial communication and device connectivity, RS-232 and RS-485 are two commonly used serial communication standards. Their working principles determine their respective performance characteristics, which in turn affect their applicability in different scenarios. Below, we will explore the differences between the two in terms of transmission speed, anti-interference capability, and communication distance … Read more
RS-232 is a serial communication standard established by the Electronic Industries Alliance (EIA) in 1962, originally used to connect computers (DTE, Data Terminal Equipment) to modems (DCE, Data Communication Equipment). Although it has gradually been replaced by USB, Ethernet, and other technologies in recent years, its simplicity and reliability still secure its place in industrial … Read more
In the field of industrial communication and device connectivity, RS-232 and RS-485 are two commonly used serial communication standards. Their working principles determine their respective performance characteristics, which in turn affect their applicability in different scenarios. Below, the editor from Wuhan Liyoude will delve into the differences between the two in terms of transmission speed, … Read more
1. Technical Background RS-232: Traditional serial port standard, typical rate 115.2 kbps (maximum about 1 Mbps). RS-485: Industrial serial port standard, typical rate 10 Mbps (theoretical maximum can reach 50 Mbps). USB: There are significant differences between different versions, for example: USB 2.0:480 Mbps USB 3.0:5 Gbps (about 5120 Mbps) USB 4.0:40 Gbps 2. Comparison … Read more
Free for Commercial Use! A Low-Code Visual Development Platform for Industrial Web with 1500+ Components Incredible Slimming!!! RS-232 from DB25 to DB9 Industrial Control for 5 Years!!! Only Connecting Three Wires to RS-232??? Importance of RS-232 RS-232 is a classic serial communication interface standard that has been widely used in computers, industrial equipment, embedded systems, … Read more
In many industrial and automotive applications, protecting interface transceivers from various electrical overstress events is a major concern. Transient Voltage Suppressor (TVS) diodes are commonly used for this purpose as they can clamp voltage spikes by creating a low-impedance current path. The electrical characteristics of TVS diodes are determined by several process factors. These parameters … Read more
Related Models MELSEC MX Controllers, MELSEC Programmable Controllers, GOT-A900/GOT1000/GOT2000 Series 1 Operating Precautions When connecting a module with RS-232/USB interface*1 to a computer, please follow the operating instructions of the computer while adhering to the precautions below. *1 For specific target models, please refer to the content below. 2 Target Models 1.1 When Using the … Read more
In the previous article, we discussed the differences between Modbus and RS-485, which belong to different layers. If we use a language analogy, then Modbus determines which “language” to use, while RS-485 and RS-232 determine the method of communication, such as face-to-face or telephone communication. In this article, we will discuss the differences between RS-485 … Read more