The TLC422 is an RS-232 to RS-422 interface converter. It is powered by a serial port (such as a computer's COM port), requiring no external power. Its small size, long transmission distance, high speed, and stable performance are compatible with standard DB9 serial ports. It is widely used in the fields of electrical engineering, industrial automation, and IC card billing systems. It is a high-quality, low-cost data interface conversion product.