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
01 【Common Ground】 RS-232, RS-422, and RS-485 all belong to UART, which stands for Universal Asynchronous Receiver/Transmitter. They can complete the communication process using only two signal lines (Rx and Tx); However, due to the different voltage levels used by each, when converting from UART to RS-232, RS-422, or RS-485, a chip such as SP3232E … Read more
BFH Click the blue text to follow us↑↑↑↑ RS-485 is a wired transmission, so it requires a hardware transmission medium, which is essentially just two wires. The actual signal transmitted on these two wires is the same; the sender splits this signal into two, but at the receiving end, it is restored to its original … Read more
Past and Present RS-485, what does RS mean? It is an abbreviation for Recommended Standard, which means a recommended standard. 485 is the standard identification number, and there is no need to delve into why this identification number is set. RS-485 is also known as ANSI/TIA/EIA-485, these prefixes are abbreviations of standard associations’ names, for … 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
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