Aaeon SBC-357 Manual page 28

The SBC-357 offers three RS-232 serial ports, and one RS-232/
422/485 serial port. You can select or disable the address for
each port with the BIOS Peripheral Setup program.
The card mounting bracket holds COM1(CN8), the DB-9 serial
port connector for the first port. The COM port connectors on
the SBC-357 board are CN7 (COM2), CN9 (COM3), CN11
(COM4). The COM2 can be assigned as RS-232 I/F or RS-422/
485 I/F. The following sections describe how to make connec-
tions.
The following table shows the pin assignments for the card's RS-
232 port:
Pin
1
2
3
4
5
6
7
8
9
10
20 SBC-357 User Manual
Signal
DCD
RX
TX
DTR
GND
DSR
RTS
CTS
RI
NC