1 Introduction In 1983, the Electronic Industries Association (EIA) approved a new balanced transmission standard known as RS-485. Investigations reveal that RS-485 is highly acclaimed and has been widely applied in industrial, medical, and consumer products, becoming the dominant specification for industrial interfaces. This application report provides design guidelines for engineers who are unfamiliar with … Read more
The RS485 interface consists of a half-duplex network, typically using a two-wire system, often employing shielded twisted pair cables for transmission. This wiring method allows a maximum of 32 nodes to be connected on the same bus in a bus topology. Initially, data was output as an analog signal for simple process quantities, and later, … Read more
In engineering, the RS485 control line is often mentioned. What exactly is it? Today, let’s discuss the applications related to RS485. By delving deeper into RS485, you will find that there is indeed a lot of knowledge involved. We will choose some common issues that need to be considered in weak current systems for everyone’s … Read more
1. Introduction USB, as a new interconnection protocol for PCs, makes the connection between peripherals and computers more efficient and convenient. This interface is suitable for various devices, not only featuring fast speed, plug-and-play, and support for hot-swapping, but also allowing up to 127 devices to connect simultaneously, solving issues such as resource conflicts, interrupt … Read more
Over 70,000 friends have followed this industrial control WeChat platform:Technical sharing,Learning exchange,Industrial control videos As industrial control professionals, it is essential for us to understand these concepts, which greatly assist in programming and data communication. RS-232, RS-422, and RS-485 are all serial data interface standards, initially formulated and published by the Electronic Industries Alliance (EIA): … Read more
Differences Between TTL and RS232 Levels What are TTL levels, CMOS levels, and RS232 levels? What are their differences? Generally speaking, CMOS levels have a higher noise tolerance than TTL levels. (1) TTL Level Standards Output L: <0.8V; H: >2.4V. Input L: <1.2V; H: >2.0V The output low level of TTL devices must be less … Read more
Typically, we use serial ports for direct broadcasting and switching control of video servers, recorders, and switchboards, mainly utilizing RS-232, RS-422, and RS-485 interfaces. Below we will discuss the serial port interface standards, usage, and external plugins and cables. The RS-232, RS-422, and RS-485 standards only specify the electrical characteristics of the interfaces, without involving … Read more
Click the above “Follow Electronics” for easy learning of electronic knowledge. Follow Electronics Subscription Account Daily updates of technical articles in the electronics industry and the latest information on microcontrollers, making it easy to learn anytime, anywhere. <RS232 and RS422 Interface Circuits> 1. RS-485 The RS-485 bus is widely used when communication distances range from … Read more
Today, I will share with you some common interfaces and communication protocols of Siemens PLC. The first major question: The difference between RS232 and RS485 interfaces 1. Physical structure of interfaces 1. RS232 interface: One of the computer communication interfaces, the RS-232 interface typically appears in the form of 9 pins (DB-9) or 25 pins … Read more
Search WeChat Jicheng Training JICHENGPEIXUN Serial port, short for serial port interface, is also known as serial communication interface or COM interface. Serial communication refers to a communication mode that uses a serial communication protocol to transmit data bit by bit over a single signal line. Serial ports are classified according to electrical standards and … Read more