IEI Integration NANO-QM871 - Manual (Page 50)

NANO-QM871 EPIC SBC
Page 35
Pin Description Pin Description
1 -NDCD 2 -NDSR
3 NSIN 4 -NRTS
5 NSOUT 6 -NCTS
7 -NDTR 8 -XRI
9 GND 10 GND
Table 3-19: RS-232 Serial Port Connector Pinouts
3.2.18 RS-422/485 Serial Port Connector (COM3)
CN Label: COM3
CN Type: 4-pin wafer
CN Location: See Figure 3-19
CN Pinouts: See Table 3-20
This connector provides RS-422 or RS-485 communications.
Figure 3-19: RS-422/485 Serial Port Connector Location
Pin Description
1 RXD422-
2 RXD422+
3 TXD422+/TXD485+
4 TXD422-/TXD485-
Table 3-20: RS-422/485 Serial Port Connector Pinouts