Serial Port 1/2/3/4 Connector (Cn12) - Aaeon PCM-6894 Manual

C o m p a c t B o a r d

2.22 Serial Port 1/2/3/4 Connector (CN12)

The PCM-6894 offers three RS-232 serial ports and one
RS-232/422/485 serial port to connect serial devices. Using the
BIOS Peripheral Setup program, you can select the address for each
port or disable it. Please check the following table for the pin
assignment.
Pin Signal
1 DCD1
3 RXD1
5 TXD1
7 DTR1
9 GND
11
DCD2 (422TXD-/485DATA -)
13 RXD2 (422RXD+)
15 TXD2 (422TXD+/485DATA+)
17 DTR2 (422RXD-)
19 GND
21 DCD3
23 RXD3
25 TXD3
27 DTR3
29 GND
31 DCD4
33 RXD4
35 TXD4
37 DTR4
39 GND
Chapter 2 Quick Installation Guide
Pin
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
2 - 18
P C M - 6 8 9 4
Signal
DSR1
RTS1
CTS1
RI1
N.C.
DSR2
RTS2
CTS2
RI2/12V
N.C.
DSR3
RTS3
CTS3
RI3
N.C.
DSR4
RTS4
CTS4
RI4
N.C.