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C.3 COM 2 connector (CN3)
Table C.3: COM2 RS-232/422/485 series port (CN3)
Pin
RS-232 port
1
DCD
2
DSR
3
RxD
4
RTS
5
TxD
6
CTS
7
DTR
8
RI
9
GND
10
N/C
11
N/C
12
N/C
13
N/C
14
N/C
C.4 COM 1 RS-232 connector (CN4)
Table C.4: COM1 RS-232 con-
nector
Pin
Signal
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
RS-422 port
RS-485 port
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
TxD+
DATA+
TxD-
DATA-
RxD+
N/C
RxD-
N/C
87
14
12
10
8
6
4
2
1
2
3
4
5
9
6
7 8
13
11
9
7
5
3
1
Appx. C
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