Rs422 Full-Duplex Interface - Datalogic Matrix 120 Reference Manual

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4.2.2 RS422 Full-Duplex Interface

The RS422 full-duplex (5 wires + shield) interface is used for non-polled communication
protocols in point-to-point connections over longer distances (max 1200 m / 3940 ft) than
those acceptable for RS232 communications or in electrically noisy environments.
The CBX pinout follows:
CBX100/500
TX+
RX+
TX-
RX-
SGND
NOTE: For applications that do not use RS422 transmission to the reader
(terminal block RX+ and RX- signals), do not leave these lines floating but
connect them to SGND as shown below.
Figure 37 - RS422 Full-duplex Connections using Only TX Signals to Host
50
Function
RS422 Transmit Data +
RS422 Receive Data +
RS422 Transmit Data -
RS422 Receive Data -
Signal Ground
SGND TX+
READER
Figure 36 - RS422 Full-duplex Connections
SGND TX+
READER
MATRIX 120™ REFERENCE MANUAL
USER INTERFACE
RX422+ TX422+
SGND RX422- TX422-
RX+
TX- RX-
USER INTERFACE
RX422+
SGND RX422-
TX-