Advantech AIMB-227 AMD R-series User Manual page 119

B.12 COM3456 Box Header (COM3456)
COM3 (BIOS selectable RS232/422/485, Default
RS-232)
Pin
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Pin
1
2
3
4
5
Signal
DCD# [3]
RXD [3]
TXD [3]
DTR# [3]
GND
DCD# [4]
RXD [4]
TXD [4]
DTR# [4]
GND
DCD# [5]
RXD [5]
TXD [5]
DTR# [5]
GND
DCD# [6]
RXD [6]
TXD [6]
DTR# [6]
GND
RS-232
Signal
COM3_DCD#
COM3_RXD
COM3_TXD
COM3_DTR#
COM3_GND
107
Pin Signal
2 DSR# [3]
4 RST# [3]
6 CTS# [3]
8 RI# [3]
10 GND
12 DSR# [4]
14 RST# [4]
16 CTS# [4]
18 RI# [4]
20 GND
22 DSR# [5]
24 RST# [5]
26 CTS# [5]
28 RI# [5]
30 GND
32 DSR# [6]
34 RST# [6]
36 CTS# [6]
38 RI# [6]
40 GND
RS-422/485
Pin
1
2
3
4
5
AIMB-227 User Manual
Signal
TXD-
TXD+
RTS-
RTS+
GND