Hello everyone, welcome to the Star Instrument Classroom, in this issue we will talk about the second half of the duplex and the full duplex Half-duplex: RS485 usually refers to half-duplex. If someone says “full-duplex RS485”, it’s actually RS422. Half-duplex communication uses the same transmission line and can send and receive data, but not both. At any time, data can only be sent by one party and received by the other. Therefore, one or two data lines can be used in half-duplex mode. A classic example is a walkie-talkie: Zhang San: Can you hear me, over Li Si: Yes, over Both people can speak and listen, but only one can speak and one listen at the same time. Full-duplex: RS422 usually refers to full-duplex. If someone says “half-duplex RS422”, it’s actually RS485. Full-duplex data communication is transmitted by two transmission lines, which can be sent and received at two different stations at the same time, and both parties can send and receive at the same time. A classic example is the telephone, where two people can talk and listen at the same time. In the actual application scenario, whether to choose half-duplex or full-duplex depends on the specific situation: if you need to implement interaction and synchronous control, then choose full-duplex; If you don’t need both sides of the communication to send and receive at the same time, or to control asynchronously, then you can choose half-duplex. Star Meter Manufacturing Co., Ltd. is a high-tech enterprise integrating R&D, production and sales. Specializing in the production of pressure transmitters, liquid level transmitters, temperature transmitters, temperature and humidity transmitters, differential pressure transmitters, soil moisture transmitters, 3051 transmitters and related instrumentation accessories. A number of products under the Xingyi brand have obtained a number of patent certificates issued by the state, such as CE certification, IS9001 certification, SGS certification, TüV SüD certification, explosion-proof certification, etc. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi: 400-600-4496!