18 serial port connector (com 3 and com 4), Table 4-20: com3 and com4 – IEI Integration NANO-9452 v1.12 User Manual
Page 73

NANO-9452 EPIC Motherboard
Page 55
PIN NO. DESCRIPTION
PIN NO.
DESCRIPTION
13 RXD485+
14 RXD485#
Table 4-19: RS-232/RS-485 Serial Port Connector Pinouts
4.2.18 Serial Port Connector (COM 3 and COM 4)
CN Label:
COM3 and COM4
CN Type:
10-pin header (2x5)
CN Location:
CN Pinouts:
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.
Figure 4-20: COM3 and COM4 Connector Pinout Locations
PIN NO.
DESCRIPTION
PIN NO.
DESCRIPTION
1
Data Carrier Direct (DCD)
2
Data Set Ready (DSR)
3
Receive Data (RXD)
4
Request To Send (RTS)
5
Transmit Data (TXD)
6
Clear To Send (CTS)
7
Data Terminal Ready (DTR)
8
Ring Indicator (RI)
9 Ground
(GND)
10
NC
Table 4-20: COM3 and COM4