CBX ELECTRICAL CONNECTIONS
84
MATRIX 320
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:
Figure 55 - RS422 Full Duplex Connections
Figure 56 - RS422 Full Duplex Connections Using Only TX Signals to Host
CBX100/500 Description
TX+ RS422 Transmit Data +
RX+ RS422 Receive Data +
TX- RS422 Transmit Data -
RX- RS422 Receive Data -
SGND Signal Ground
NOTE
For applications that do not use RS422 transmission to the reader (ter-
minal block RX+ and RX- signals), do not leave these lines floating but
connect them to SGND as shown below.
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