Serial Ports Interface - AXIOMTEK IFO2175-873 Series User Manual

IFO2175-873 Series Panel PC User's Manual
2.3

Serial Ports Interface

The IFO2175-873 series has three serial ports, COM1 (RS-232/ 422/ 485) with isolated 4KV.
The following table shows you the pin assignments of this connector:
Pin Signal
1 Data Carrier Detect (DCD)
2 Receive Data (RXD)
3 Transmit Data (TXD)
4 Data Terminal Ready (DTR)
5 Ground (GND)
In addition, COM1 can be set for RS-232/422/485 via BIOS.
In BIOS, user can change transmission mode in following menu.
AdvancedNCT6106D Super IO ConfigurationSerial Port 0 ConfigurationTransmission
Mode
Please refer to Chapter 3 for BIOS setting.
When COM1 is set to RS-422 or RS-485, the pin assignments are listed below:
Pin
RS-422
1 TX-
2 TX+
3 RX+
4 RX-
5 No connector
6 No connector
7 No connector
8 No connector
9 No connector
14
Pin
6
7
8
9
Signal Name
RS-485
DATA-
DATA+
No connector
No connector
No connector
No connector
No connector
No connector
No connector
Signal
Data Set Ready (DSR)
Request To Send (RTS)
Clear To Send (CTS)
Ring Indicator (RI)
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