RS485/RS422 universal optical isolation ultra-remote driver. Adopt CAN bus driver without changing RS232 protocol (software);  Extend the RS485/RS422 communication distance to 10km (4800bps) or 5km (9600bps) with only two wires; Support 110 RS485 nodes networking; Solve the problem of adding power to repeaters in the field; External 5V power supply; Rail-mounted industrial structure; With indicator.