2.4.14
COM Port 1 ~ 3 (RS-232/422/485) (CN17, CN18, CN21)
Pin
RS-232
1
DCD
2
RX
3
TX
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
Chapter 2 – Hardware Information
RS-422
RS-485
RS422_TX-
RS485_D-
RS422_TX+
RS485_D+
RS422_RX+
RS422_RX-
Signal Type
IN
IN
OUT
OUT
GND
IN
OUT
IN
IN
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