20 serial port connector (rs-422/485) – IEI Integration IMBA-9454 v1.00 User Manual

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IMBA-9454 Motherboard

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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

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