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2.2.9
COM1 Serial Ports (RS-232 Only)
Pin #
1
6
1
2
3
5
4
5
6
7
8
9
2.2.10 COM2 Serial Ports (RS-232/422/485)
Pin #
6
1
5
16 • Hardware Installation
Signal Name
DCD, Data carrier detect
RXD, Receive data
TXD, Transmit data
DTR, Data terminal ready
GND, ground
DSR, Data set ready
RTS, Request to send
CTS, Clear to send
RI, Ring indicator
RS-232
1
DCD, Data carrier detect
2
RXD, Receive data
3
TXD, Transmit data
4
DTR, Data terminal ready
5
GND, ground
6
DSR, Data set ready
7
RTS, Request to send
8
CTS, Clear to send
9
RI, Ring indicator
RS-422
RS-485
TX-
DATA-
TX+
DATA+
RX+
NC
RX-
NC
GND
GND
NC
NC
NC
NC
NC
NC
NC
NC
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