IEI Integration IMBA-9454 v4.02 - Manual (Page 77)

IMBA-9454G Motherboard
Page 59
Figure 4-20: Serial Port Connector (RS-232/422/485) Pinout Locations
PIN DESCRIPTION PIN DESCRIPTION
1 DCD 2 DSR
3 RXD 4 RTS
5 TXD 6 CTX
7 DTR 8 RI
9 GND 10 NC
11 TXD1+ 12 TXD1-
13 RXD1+ 14 RXD1-
Table 4-22: Serial Port Connector (RS-232/422/485) Pinouts
4.2.20 Serial Port Connector (RS-422/485)
CN Label: CN1
CN Type: 4-pin header
CN Location: See Figure 4-21
CN Pinouts: See Table 4-23
The 4-pin serial port connector provides RS-422/485 serial communications channels that
can be connected to external RS-422/485 serial port devices. The port is shared with the
COM2 port.