RS422 is a form of serial communication. Converters such as the RS422 to fiber are used to change the electrical signals associated with RS422 into optical signals for fiber optic transmission. This is helpful in industrial automation contexts in which dependable long-distance serial communication is required. Compared to RS422 copper cables, fiber optic cables can transmit RS422 data much farther. In addition, it diminishes the impact of electrical interference that is commonplace in industrial settings, thus ensuring reliable data transfer between devices with RS422 ports and those connected via fiber optic networks