Serial Port Connector: Com1~6 - MSI MS-98H3 Manual

Hardware Setup

Serial Port Connector: COM1~6

This connector is a 16550A high speed communications port that sends/receives
16 bytes FIFOs. You can attach serial devices to it through the optional serial
port bracket.
COM1: RS-232/422/485 with 0V/5V/12V
RS232
PIN SIGNAL
1 DCD
3 SIN
5 SOUT
7 DTR
9 GND
11 DSR
13 RTS
15 CTS
17 VCC_COM1
19 NC
COM2: RS-232 with 0V/5V/12V
RS232
PIN SIGNAL
2 DCD
4 SIN
6 SOUT
8 DTR
10 GND
12 DSR
14 RTS
16 CTS
18 VCC_COM1
20 NC
2-10
DESCRIPTION
Data Carrier Detect
Signal In
Signal Out
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Voltage select setting by jumper
No Connection
RS485
PIN SIGNAL DESCRIPTION
1 485 TXD- Transmit Data, Negative
3 485 TXD+ Transmit Data, Positive
5 NC No Connection
7 NC No Connection
9 GND Signal Ground
11 NC No Connection
13 NC No Connection
15 NC No Connection
17 NC No Connection
19 NC No Connection
DESCRIPTION
Data Carrier Detect
Signal In
Signal Out
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Voltage select setting by jumper
No Connection
RS422
PIN SIGNAL DESCRIPTION
1 422 TXD- Transmit Data, Negative
3 422 TXD+ Transmit Data, Positive
5 422 RXD+ Receive Data, Positive
7 422 RXD- Receive Data, Negative
Signal Ground
9 GND
11 NC No Connection
13 NC No Connection
15 NC No Connection
17 NC No Connection
19 NC No Connection