AXIOMTEK IFO2225-873 Series, User Manual

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IFO2225-873 Series User’s Manual
Hardware Installation 17
2.3 Serial Port Interfaces
The IFO2225-873 Series has three serial ports; COM1 (RS-232/422/485) with isolated 4KV,
COM2 (RS-232), and COM3 (RS-232). You can change the communication mode
(RS-232/422/485) via BIOS setting, see section 3.4. Each serial port interface is available
through standard DB-9 connector. The pin assignments of RS-232/RS-422/RS-485 are listed
in table below.
2.4 Installing PCI-Express Mini Card
To install PCI-Express Mini Card, please follow the steps below.
Step 1.
Turn off the system, and unplug the power cord.
Step 2. Locate and release these screws to open the back cover.
Pin RS-232 RS-422
(COM1 only) RS-485
(COM1 only)
1 DCD TX- Data-
2 RXD TX+ Data+
3 TXD RX+ NC
4 DTR RX- NC
5 GND NC NC
6 DSR NC NC
7 RTS NC NC
8 CTS NC NC
9 RI NC NC