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本文介绍了几种现在常用的数据接口RS232、RS422和RS485,由于RS232的通信距离短、传输速率低,为扩展其应用范围需要将RS232接口转为RS485接口,将其发送端和接收端对应相连,考虑到其传输数据的安全性,本设计特别采用了数据隔离的方式来保证数据传输的准确性,并且采用了隔离电源对两端的接口进行分别供电本设计对两端接口做了一些保护电路,具备了防雷防浪涌的功能,提高了其电磁兼容性能,更好的实现数据传输本设计将RS232和RS485的优点完全结合,使其具有很强的实用性。
This article describes several commonly used data interface RS232, RS422 and RS485, due to the short distance RS232 communication, transmission rate is low, in order to expand its range of applications need to RS232 interface to RS485 interface, the sender and receiver corresponding connected , Taking into account the safety of its data transmission, the design uses a special way to isolate data to ensure the accuracy of data transmission, and the use of isolated power supply on both ends of the interface were separately powered The design of the two ends of the interface to do some protection circuit , With lightning surge function, improve its electromagnetic compatibility, and better data transmission The design of the advantages of RS232 and RS485 fully integrated, it has a strong practicality.