How to Design a Modular Host Computer? Why is there such a big difference in the situation of engineers at home and abroad? Easy Learning of TIA Portal SCL Programming Structured Variables Understand S7-1500 PLC Reading and Writing SQL Microsoft Database in Seconds 1. Device Functionality Among various schemes for medium to long distance communication … Read more
Abstract: This design guide discusses how to design RS-485 interface circuits. It covers the necessity of balanced transmission line standards and provides an example of a process control design. The article also discusses line loading, signal attenuation, failure protection, and current isolation under different headings. 1 Why Balanced Transmission Line Standards Are Needed This article … Read more
Among the various solutions for medium to long-distance communication between MCUs, RS-485 is widely used in factory automation, industrial control, community monitoring, and water resources automatic reporting due to its simple hardware design, ease of control, and low cost. However, RS-485 bus still has defects in anti-interference, adaptability, and communication efficiency. Improper handling of some … Read more
With the popularization of the concept of “carbon neutrality”, industries such as photovoltaics, wind power, and energy storage are once again ushering in a boom. As a commonly used communication interface in these industries, RS-485 often requires additional protection circuits to ensure stable communication. This article will introduce a protection circuit scheme for multi-node environments. … Read more
Follow+Star Public Number, don’t miss wonderful content Source | Zhou Ligong The RS-485 bus is widely used in communication, industrial automation, and other fields. In practical applications, it is often encountered whether to add pull-up and pull-down resistors and what size of resistors is appropriate. Below we will analyze these issues in detail. Why are … Read more
The RS-485 bus is widely used in industrial environments, which may experience high levels of electrostatic or surge interference. Engineers typically use gas discharge tubes and TVS diodes to build protective circuits. However, these circuits have a high junction capacitance, which, if improperly applied, can affect communication. This article will introduce a low junction capacitance … Read more
Click the card above to follow for more information RS-485 is a physical layer bus design standard in industrial and instrumentation applications, and has become one of the most widely used standard communication interfaces in the industry.This communication interface allows for multipoint bidirectional communication over a simple pair of twisted wires, and its noise suppression … Read more
A previous article summarized the industrial HART bus, and today we will discuss the RS-485 bus. RS-485 is a widely used communication interface, and this article will cover the key points in detail, with a length of about 5000 words. The Past and Present RS-485, what does RS mean? It stands for Recommended Standard, which … Read more
The RS485 bus is widely used in various fields such as video surveillance, access control intercoms, and building alarms due to its simple wiring and reliable stability. However, many inaccurate concepts during the wiring process can lead to various issues. Here are some summarized misconceptions. 1. The 485 signal line can be run alongside high-voltage … Read more
