2-10
Chapter 2: Installation
Serial Ports
The COM1 serial port is beside
USB (see Figure 2-3). See the
table on the right for pin defini-
tions. The COM2 connector is a
header on the motherboard (1-2
for location).
Serial Port Pin Definitions
(COM1, COM2)
Pin Number
Definition
1
CD
2
RD
3
TD
4
DTR
5
Ground
Pin Number
Definition
6
DSR
7
RTS
8
CTS
9
RI
10
NC
GLAN1/2 (Ethernet Ports)
Two Ethernet ports (designated
GLAN1 and GLAN2) are located
beside the VGA port on the IO
backplane. These ports accept
RJ45 type cables.
Note:
Pin 10 is included on the header but not on
the port.
Fan Headers
The motherboard has three CPU
and chassis fan headers. Desig-
nations include CPU Fan1, CPU
Fan2 and Chassis Fan1. See the
table on the right for pin defini-
tions.
Fan H eader Pin Definitions
Pin
Number
1
2
3
Definition
Ground (black)
+12V (red)
Tachometer
Caution: These fan headers
are D C power.
Power LED/Speaker/NMI
On the JDI header, pins 1-3 are
for a power LED, pins 4-7 are for
the speaker and pins 8-9 are for
the NMI connection. See the table
on the right for speaker pin defini-
tions. Note: The speaker connec-
tor pins are for use with an exter-
nal speaker. If you wish to use
the onboard speaker, you should
close pins 6-7 with a jumper.
Speaker Connector P in
Definitions (JD1)
Pin
Number
4
5
6
7
Function
+
Key
Definition
Red wire, Sp eaker data
No conn ection
Key
Speaker data
