4
USB to RS-422
RS-422 device
Pin 1: TxD-
TxD-
Pin 2: TxD+
TxD+
RxD+
Pin 4: RxD+
RxD-
Pin 3: RxD-
USB to RS-422
RS-422 device
RS-422 device
RS-422 device
Figure 4: point-to-point / 4-wire full-duplex communication
RS-422 Wire Diagram
Figure 5: point-to-multi point / 4-wire full-duplex
communication