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COM1/2/3/4/5/6(9-Pin): Serial Port Headers
COM1/2: RS232/422/485 Header;
COM3/4/5/6: RS232 Header.
Pin NO. RS232
*RS422
(for COM1/2)
*RS485
(for COM1/2)
Pin 1
DCD
TX-
DATA-
Pin 2
R
X
D
TX+
DATA+
Pin 3
T
X
D
RX+
NC
Pin 4
DTR
RX-
NC
Pin 5
GND
GND
GND
Pin 6
DSR
NC
NC
Pin 7
RTS
NC
NC
Pin 8
CTS
NC
NC
Pin 9
RI
NC
NC