IEI Integration NANO-9452 v4.01 - Manual (Page 71)

NANO-9452 EPIC Motherboard
Page 53
Figure 4-20: RS-232/422/485 Serial Port Connector Location
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 DCD 2 NDSR2
3 RXD 4 NRTS2
5 TXD 6 NCTS2
7 DTR 8 NRI2
9 GND 10 GND
11 TXD485+ 12 TXD485#
13 RXD485+ 14 RXD485#
Table 4-20: RS-232/RS-485 Serial Port Connector Pinouts
4.2.19 Serial Port Connector (RS-232)
CN Label: COM3 and COM4
CN Type: 10-pin header (2x5)
CN Location: See Figure 4-21
CN Pinouts: See Table 4-21
The 10-pin serial port connector provides a second RS-232 serial communications
channel. The COM 2 serial port connector can be connected to external RS-232 serial port
devices.