
UNO-4678 User Manual 24
A.3 RS-232/422/485 9pin Serial Port (COM1~COM2)
Table A.5: RS-232/422/485 pin assignments
Pin RS-232 RS-422 RS-485
1 DCD Tx- Data-
2 Rx Tx+ Data+
3 Tx Rx+ -
4DTRRx- -
5 GND GND GND
6DSR- -
7RTS- -
8CTS- -
9RI - -
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9
6
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