MSI MS-98H6, Manual

Page: 19 / 48

2-7
Hardware Setup MS-98H6
RS232/422/485 Serial Port Connector: JCOM1&JCOM2
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.
PIN SIGNAL DESCRIPTION
1
3
5
7
9
11
13
15
17 2
4
6
8
10
12
14
16
18 DCD
SIN
SOUT
DTR
GND
DSR
RTS
CTS
VCC_COM1
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
RS232
PIN SIGNAL DESCRIPTION
1
3
5
7
9
11
13
15
17 2
4
6
8
10
12
14
16
18 422 TXD-
422 TXD+
422 RXD+
422 RXD-
GND
NC
NC
NC
NC Transmit Data, Negative
Transmit Data, Positive
Receive Data, Positive
Receive Data, Negative
Signal Ground
No Connection
No Connection
No Connection
No Connection
RS422
PIN SIGNAL DESCRIPTION
1
3
5
7
9
11
13
15
17 2
4
6
8
10
12
14
16
18 485 TXD-
485 TXD+
NC
NC
GND
NC
NC
NC
NC Transmit Data, Negative
Transmit Data, Positive
No Connection
No Connection
Signal Ground
No Connection
No Connection
No Connection
No Connection
RS485