USB to RS485/422 optical isolation converter. Full duplex and half duplex; USB port self-powered; Automatic transceiver and conversion without delay; Baud rate: 300bps-1Mbps, self-adaptive; Maximum communication distance: 2km (9600bps) or 3km (4800bps); Rail-mounted industrial structure; With communication indicator; Can be configured with 128 RS485 nodes; Lightning protection.