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UNO-2184G/2174G/2174GL User Manual
24
A.3
RS-232 Standard Serial Port
A.4
RS-232/422/485 Serial Port (COM1 ~ COM2)
Table A.3: RS-232 Serial Port Pin Assignments
Pin
Pin Name
1
DCD
2
RxD
3
TxD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
1
5
9
6
3
2
4
7 8
Table A.4: RS-232/422/485 Serial Port Pin Assignments
Pin RS-232
RS-422
RS-485
1 DCD
TX-
Data-
2 RxD
TX+
Data+
3 TxD
RX+
NC
4 DTR
RX-
NC
5 GND
GND
GND
6 DSR
NC
NC
7 RTS
NC
NC
8 CTS
NC
NC
9 RI
NC
NC