Com Port Rs-232 Pin Assignment (Com1, Com2); Com2 Rs-422/485 Pin Assignment - AXIOMTEK SHB101 Series User Manual

SHB101 LGA775 Full-Size SBC User's Manual

2.4.5 COM Port RS-232 Pin Assignment (COM1, COM2)

The serial interface for the board consists of COM1 port (COM1)
support for RS-232, and COM2 (COM2) for RS-232/RS422/RS485.
Pin Signal
Data Carrier Detect
1
(DCD)
3 Receive Data (RXD)
5 Transmit Data (TXD)
Data Terminal Ready
7
(DTR)
9 Ground (GND)
2.4.6

COM2 RS-422/485 Pin Assignment

COM2 Serial Port 10-pin (Box-header) Connector Pin Assignment list
Pin #
1
2
3
4
5
6
7
8
9
10
12
Pin Signal
Data Set Ready (DSR)
2
4 Request to Send (RTS)
6 Clear to Send (CTS)
Ring Indicator (RI)
8
10 Ground (GND)
Signal Name
RS-422 RS-485
TX- DATA-
No connector No connector
TX+ DATA+
No connector No connector
RX+ No connector
No connector No connector
RX- No connector
No connector No connector
GND
GND
Jumpers and Connectors
COM1, COM2
2
1
3 4
6
5
8
7
9
10
GND
GND