Instruction Manual

IMBA-9454 Motherboard
Page 65
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.
Figure 4-21: Serial Port Connector (RS-422/485) Pinout
Locations
PIN DESCRIPTION
1 TXD1+
2 TXD1-
3 RXD1+
4 RXD1-
Table 4-23: Serial Port Connector (RS-422/485) Pinouts