Main Serial Interface
Reference Manual 29
RS422 Full-Duplex Interface
The RS422 full-duplex interface is used for non-polled communication proto-
cols in point-to-point connections over longer distances (max 1200 m / 3940 ft)
than
those acceptable for RS232 communications or in electrically noisy envi-
ronments.
The following positions of the CBX510 spring clamp connector (row 4) are used
fo
r RS422 full-duplex interface connection:
Name Function
SGND Signal ground (isolated)
TX+ RS422 output (+)
TX- RS422 output (-)
RX+ RS422 input (+)
RX- RS422 input (-)
.
For applications that do not use RS422 RX signals, do not leave these lines floating but
connect them to SGND as shown below
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