MSI MS-98H9 Manual page 28

Hardware Setup
Serial Port Connector: JCOM1~6
This connector is a 16550A high speed communications port that sends/receives
16 bytes FIFOs. You can attach a serial device to it.
COM1/ 2: RS-232/422/485 with Ring/0V/5V/12V
RS-232
PIN SIGNAL
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 VCC_COM1
RS-422
PIN SIGNAL
1 422 TXD-
2 422 RXD+
3 422 TXD+
4 422 RXD-
5 GND
6 NC
7 NC
8 NC
9 NC
COM3/ 4/ 5/ 6: RS-232 with 0V/5V/12V
PIN SIGNAL
1 NDCD
2 NSIN
3 NSOUT
4 NDTR
5 GND
6 NDSR
7 NRTS
8 NCTS
9 VCC_COM
2-16
DESCRIPTION
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Voltage select setting
by J1
DESCRIPTION
Transmit Data, Negative
Receive Data, Positive
Transmit Data, Positive
Receive Data, Negative
Signal Ground
No Connection
No Connection
No Connection
No Connection
DESCRIPTION
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
12V or 5V power output,
selected by jumper
RS-485
PIN SIGNAL DESCRIPTION
1 485 TXD- Transmit Data, Negative
2 485 TXD+ Transmit Data, Positive
3 NC No Connection
4 NC No Connection
5 GND Signal Ground
6 NC No Connection
7 NC No Connection
8 NC No Connection
9 NC No Connection