RS-485 bus splitter hub (HUB) designed for industrial automation communication, solving RS-485 bus star structure networking and solving RS-485 large system requirements in complex electromagnetic field environment. Support The transmission rate is up to 115.2 Kbps, the RS-485 interface uses opto-isolation technology, 600W lightning surge protection circuit, providing 1000V isolation voltage can effectively suppress The lightning protection and ESD protection RS-485 working mode adopts the discriminating circuit to automatically sense the data flow direction, and automatically switch the enabling control circuit to easily solve the RS-485 transceiving conversion delay problem. The RS-485 interface transmission distance is greater than 3000 meters. Stable performance. Widely used in highway toll collection systems, road monitoring systems and power collection systems, it is a data interface conversion product with excellent performance and excellent price.