Serial Port Connectors (Com1, Com2); Rs-422/485 Serial Port Connector (Com3); Figure 3-14: Rs-232 Serial Port Connector Locations; Table 3-14: Serial Port Connector Pinouts - IEI Technology NANO-QM770-R10 User Manual

3.2.12 RS-232 Serial Port Connectors (COM1, COM2)
CN Label: COM1, COM2
10-pin header, p=2.00mm
CN Type:
CN Location: See Figure 3-14
CN Pinouts: See Table 3-14
The 10-pin serial port connectors provide two RS-232 serial communications channels.
The COM serial port connectors can be connected to external RS-232 serial port devices.

Figure 3-14: RS-232 Serial Port Connector Locations

Pin Description
1 -NDCD
3 NSIN
5 NSOUT
7 -NDTR
9 GND

Table 3-14: Serial Port Connector Pinouts

3.2.13 RS-422/485 Serial Port Connector (COM3)

CN Label: COM3
CN Type: 4-pin wafer, p=2.00mm
CN Location: See Figure 3-15
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NANO-QM770 EPIC SBC
Pin Description
2 -NDSR
4 -NRTS
6 -NCTS
8 -XRI
10 GND