MATRIX 300N™ REFERENCE MANUAL
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4
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
Function
TX+
RS422 Transmit Data +
RX+
RS422 Receive Data +
TX-
RS422 Transmit Data -
RX-
RS422 Receive Data -
SGND
Signal Ground
Figure 37 - RS422 Full-duplex Connections
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 38 - RS422 Full-duplex Connections using Only TX Signals to Host
RX422+
SGND
RX422-
USER INTERFACE
SGND TX+
TX-
READER
RX422+ TX422+
SGND
RX422-
TX422-
USER INTERFACE
SGND TX+
RX+
TX-
RX-
READER
Summary of Contents for Matrix 300N
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