Figure 3-22: Rs-232/422/485 Serial Port Connector Locations; Table 3-21: Rs-232/422/485 Serial Port Connector Pinouts - IEI Technology AESQ170-969 User Manual

CN Label: COM3, COM4
CN Type: 10-pin box header, p=2.54 mm
CN Location: See Figure 3-22
CN Pinouts: See Table 3-21 and Table 3-22
Each of these connectors provides RS-232/422/485 connections.
NOTE:
The communication protocol of the serial ports is set through the
BIOS menu in "Advanced →Super IO Configuration→Serial Port 3/4
Configuration". Use the Transfer Mode BIOS option to configure
the correspondent serial ports (refer to Sections 5.3.4.1.3 and
5.3.4.1.4 for detailed information).

Figure 3-22: RS-232/422/485 Serial Port Connector Locations

Pin
1 DCD
3 SIN
5 SOUT
7 DTR
9 GND

Table 3-21: RS-232/422/485 Serial Port Connector Pinouts

The user may use the RS-232/422/485 cable to connect to a serial device.
The pinouts of the DB-9 connector are listed below.
Description
Chapter 3
Pin
2 DSR
4 RTS
6 CTS
8 RI
10 GND
41
Connectors
Description