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UNO-4678
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Appendix A
T
able A.4: RS
-232/422/485
Serial Port
s (COM3~10)
Pins
RS-232
RS-422
RS-485
1R
x
D
T
x
+
D
a
t
a
+
2T
x
D
T
x
-
D
a
t
a
-
3R
T
S
R
x
+
-
4C
T
S
R
x
-
-
5
GND
GND
GND
1
...
...
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60
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63
...
...
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