User`s manual

Mini-ITX Mainboard Manual
12
Serial port Connector (JCOM3 & JCOM4)
The motherboard has a Serial Port Connector for connecting RS-232 Port.
Pin
Assignment
1 Carrier detect
2 Received data
3 Transmitted
4 Data terminal
5Si
g
nal
g
round
6 Data set read
y
7 Request to
send
8 Clear to send
9 +5V
1
9
2
10
1
9
2
10
JCOM4
JCOM3
10 NC
Serial port Connector (JCOM5 & JCOM6)
The motherboard has a Serial Port Connector for connecting RS-232 Port.
Pin Assignment
1 Carrier detect
2 Received data
3 Transmitted
4 Data terminal
5Si
g
nal
g
round
6 Data set read
y
7 Request to
send
8 Clear to send
9 +12V
1
9
2
10
1
9
2
10
JCOM6
JCOM5
10 NC
Note: Please notice Pin 9 of every serial port connector. JCOM3 and JCOM4:
+5V; JCOM5 and JCOM6: +12V.