JZGKCHINA Industrial Control Technology Sharing Platform 1 Introduction: RS-485 is a standard protocol for transmitting data that can be used to establish a reliable, high-speed, real-time, multi-node data communication network connection. RS-485 is also known as TIA-485. RS-485 defines the electrical characteristics of drivers and receivers used in serial communication systems. RS-485 is widely used … Read more
San Pao Er’s Hardware Development Learning Notes Sharing knowledge to enhance skills♥Exchanging experiences to strive for excellence Table of Contents 1. Main Features 2. Network Topology 3. Signal Levels and Unit Loads 4. Bus Termination and Stub Length 5. Fail-Safe Biasing ✍ RS-485 is a balanced transmission standard for serial communication approved by the Electronic … Read more
Introduction The RS-485 bus is widely used in industrial communication, but harsh industrial environments can lead to external interference, such as Electrical Fast Transients (EFT), which affect its stability. This article explores how to test and mitigate the interference of EFT on the RS-485 bus. Sources of Pulse Group Interference In industrial control environments, disturbances … Read more
Today, I will share a document from TI titled “RS-485 Design Guide”. Reply “485 Design Guide” in the public account backend to obtain the complete PDF. 1 Introduction In 1983, the Electronic Industries Association (EIA) approved a new balanced transmission standard known as RS-485. It has been found that RS-485 is highly praised and is … Read more
Any form of communication requires rules to ensure everyone is on the same page. In electronics, these rules take the form of standards—these are widely applicable design specifications recommended by industry associations. Following these guidelines helps engineering devices speak the same electronic language, enabling efficient and reliable communication. RS-232 (“RS” stands for “Recommended Standard”) was … Read more
RS-485 Bus Overview When the communication distance is required to be from tens to thousands of meters, the RS-485 serial bus standard is widely used. RS-485 uses balanced transmission and differential reception, thus it has the ability to suppress common-mode interference. Additionally, the bus transceiver has high sensitivity and can detect voltages as low as … Read more
Today, I would like to share a document from TI titled “RS-485 Design Guide”, which can serve as an introduction. The document link is as follows: https://www.ti.com.cn/cn/lit/pdf/zhcaa89 1 Introduction In 1983, the Electronic Industries Association (EIA) approved a new balanced transmission standard known as RS-485. It was found that RS-485 was highly praised and widely … Read more
The RS-485 bus has advantages such as a simple structure and low cost. However, when engineers set up RS-485 bus networks, they often encounter the question: should termination resistors be added to improve the reliability of the entire network’s communication? This article will answer that question. 1. The Role of Termination Resistors For the RS-485 … Read more
01 【Overview of RS-485】 RS-485, like RS-232, is a serial communication standard. The current standard name is TIA485/EIA-485-A, but it is commonly referred to as the RS-485 standard. RS-485 is widely used in industries such as automation, automotive, and building management. The RS-485 bus overcomes the shortcomings of RS-232’s short communication distance and low speed. … Read more
This article introduces the correct connection method for RS-485 networks, including suggestions for twisted pair wiring and proper installation of termination resistors. It lists the receiver waveforms under correct and incorrect termination. Configurations from simple single transmitter/multiple receiver networks to multiple transceivers and multiple branch circuits are provided. This article can serve as a basic … Read more