Advantech 2006957006 5th Edition User Manual
100
PCM-9570/S User's Manual
C.18 COM port connector (CN20)
Table C-18: COM port connector (CN20)
Pin
Signal
Pin
Signal
1
DCD1
2
DSR1
3
RX1
4
RTS1
5
TX1
6
CTS1
7
DTR1
8
RI1
9
GND
10
NC
11
DCD2
12
DSR2
13
RX2
14
RTS2
15
TX2
16
CTS2
17
DTR2
18
RI2
19
GND
20
NC
21
DCD3
22
DSR3
23
RX3
24
RTS3
25
TX3
26
CTS3
27
DTR3
28
RI3
29
GND
30
NC
31
DCD4
32
DSR4
33
RX4
34
RTS4
35
TX4
36
CTS4
37
DTR4
38
RI4
39
GND
40
NC
Note:
The cable of serial port (CN20) comes
with four DSUB-9 male connectors. The
pin assignments of each DSUB-9
connector are listed below for your
reference:
pin assignments of each DSUB-9
connector are listed below for your
reference:
40
1
2
39
37
38
3
4