IEI Integration NANO-945GSE v1.01 - Manual (Page 85)

NANO-945GSE EPIC Motherboard
Page 65
4.3.19 Serial Port Connector (COM 2)(RS-232, RS-422 or RS-485)
CN Label: COM2
CN Type: 14-pin header (2x7)
CN Location: See
849H
Figure 4-21
CN Pinouts: See
850H
Table 4-22
The 14-pin serial port connector connects to the COM2 serial communications channels.
COM2 is a multi function channel. In default mode COM2 is an RS-232 serial
communication channel but, with the COM2 function select jumper, can be configured as
either an RS-422 or RS-485 serial communications channel.
Figure 4-21: RS-232/422/485 Serial Port Connector Location
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 NDCD 2 NDSR2
3 NRX 4 NRTS2
5 NTX 6 NCTS2
7 NDTR 8 NRI2
9 GND 10 GND
11 TXD485+ 12 TXD485-
13 RXD485+ 14 RXD485-
Table 4-22: RS-232/RS-485 Serial Port Connector Pinouts