AXIOMTEK MPC225-851 Series, Руководство пользователя, Страница: 35 / 77

MPC225-851 Series User’s Manual
Hardware Installation
23
2.4 Serial Ports Interface
The MPC225-851 series has three serial ports, COM1 (RS-232/ 422/
485) and COM2 / COM3 (RS-232).
The following table shows you the pin assignments of this connector:
Pin Signal Pin Signal
1 Data Carrier Detect (DCD) 6 Data Set Ready (DSR)
2 Receive Data (RXD) 7 Request To Send (RTS)
3 Transmit Data (TXD) 8 Clear To Send (CTS)
4 Data Terminal Ready (DTR) 9 Ring Indicator (RI)
5 Ground (GND)
In addition, COM1 can be set for RS-232/422/485 by jumper. The jump
setting is listed as below:
COM1 JP16 JP17 JP19
RS-232 (default) 1-2 3-5,4-6 3-5,4-6
RS-422 3-4 1-3,2-4 1-3,2-4
RS-485 5-6 1-3,2-4 1-3,2-4