: Recently, I modified an old device that required communication control applications, from which I derived some insights: 1. FX2N-485-BD is economical to use; A./ (ASCII communication mode, operation, and frequency register address can be easily mistaken, but LRC checksum is easy to obtain)/ B../ (RTU communication mode, operation, and frequency register address is less … Read more
Abstract This article introduces the correct connection methods for RS-485 networks, including twisted pair wiring and recommendations for proper installation of termination resistors. It lists the receiver waveforms under correct and incorrect termination. This application note provides a basic guide for connecting RS-485 networks. The RS-485 specification (officially known as TIA/EIA-485-A) does not specifically dictate … Read more
The RS-485 bus is widely used in communication, industrial automation, and other fields. In practical applications, one often encounters the question of whether to add pull-up and pull-down resistors and what resistance values are appropriate. Below, we will analyze these issues in detail. 1. Why are Pull-Up and Pull-Down Resistors Needed? 1) When the differential … Read more
Follow+Star Public Account Number, don’t miss out on exciting content Compiled by | strongerHuang WeChat Public Account | Embedded Column RS-485 is a physical layer bus design standard used in industrial and instrumentation applications, and it has become one of the most widely used standard communication interfaces in the industry. This communication interface allows for … Read more
Follow+Star Public Account, don’t miss out on exciting content Source | Semiconductor Industry Observation Although both standards have long been used for serial communication, RS-485 offers valuable features that RS-232 does not. Learn more in this article. Any form of communication requires rules to help ensure everyone stays consistent. In the electronics field, these rules … Read more
The RS-485 bus is widely used in communication, industrial automation, and other fields. In practical applications, one often encounters the question of whether to add pull-up and pull-down resistors and what resistance values are appropriate. Below, we will conduct a detailed analysis of these issues. 1. Why are Pull-Up and Pull-Down Resistors Needed? According to … Read more
In serial communication, both parties are required to use a standard interface, allowing different devices to connect easily for communication. The RS-232 communication standard is defined by a 25-pin interface and was widely used in early computers such as PC or XT models. However, in models after the AT series, a simplified 9-pin version is … Read more
Hello everyone, we are the Low Voltage Industry Network! RS232, RS422, and RS485 have always been common interfaces in the low voltage industry. Many friends have mentioned the differences between them. In this issue, the Low Voltage Industry Network will summarize the main differences, which can be categorized into six aspects. Let’s take a look. … Read more
The RS-232 bus is the most widely used serial interface bus in PC and industrial communication. The RS-232 interface was originally defined by the American EIA (Electronic Industries Alliance) as a standard for communication between computers and terminal devices. Due to its simple interface and high reliability for short-distance communication, it is widely used in … Read more
RS232-RS485-USB to Fiber Optic Signal—Gateway Converter–HD67072 Author: Zou Wuyi Mobile185-020-77899 Email: [email protected] 1 Product Features: The standards can be mixed and matched, allowing RS-232 devices to connect with RS-485 devices, or USB devices to communicate with RS-485 devices, or RS-232 devices to communicate with USB devices through replacement converters and isolators. Fiber optic lines are … Read more