Fully isolated power supply and signal for stronger anti interference and reliable operation. USB to RS485/RS422 converter enables PC users to connect RS485 or RS422 devices to USB based systems. Attaching the converter to a PC does not require opening the chassis or turning off the PC to install the adapter. With the converter, you get one extra speed RS485 or RS422 port for immediate use. Compatibility and performance Compatible with USB enabled PCs and supports RS485 and RS422 devices. Isolation between power and signal helps protect the PC and improve reliability in electrically noisy environments. Provides a straightforward, speed USB interface for RS485/RS422 communication. Use scenarios Industrial automation and control: connect field devices, sensors, or PLCs with RS485 or RS422 to a PC for monitoring and data logging without opening the computer chassis. Lab testing and development: quickly add an RS485/RS422 interface to a PC for prototyping, testing, or software development. Building automation and security: integrate RS485/RS422 controllers, panels, or door sensors with a PCbased management system.