The RS422 interface module facilitates two-way communication over long distances, up to 1000 meters, through channels A, B, Y, and Z. It boasts 15KV ESD protection and features a 10-ohm overcurrent protection resistor integrated onto the board. Equipped with a TVS diode, it offers lightning and peak voltage protection. With a built-in 120-ohm terminating resistance, the module effectively minimizes echo interference in long-distance communication. Utilizing the MAX490 chip, the module ensures stable communication at speeds of up to 2.5 MBPS.