
Chapter 5: Advanced Motherboard Setup
5-11
5-9 Connector
Definitions
Power Supply Connectors
The primary power supply connec-
tor on the P4SCE meets the SSI
(Superset ATX) 24-pin specifica-
tion. Refer to the table on the right
for the pin definitions of the ATX
24-pin power connector. You
must also connect the 4-pin J21
power connector to your power
supply. Refer to the table below
right for the J24 (12V) connector.
If J21 is not accessible, another
12V power connector (J38) is
available, which is located nect to
the COM2 port.
Important: you must use connect
either J21 or J38 to your power
supply to meet the ATX safety re-
quirements.
Pins #
1 & 2
3 & 4
Definition
Ground
+12 V
+12V 4-pin PWR
Connector
(J21)
Required
Connection
IR Connector
The infrared connector is located
on J16. See the table on the right
for pin definitions. See the Tech-
nical Support section of our web
page for information on the infra-
red devices you can connect to
the system.
ATX Power Supply 24-pin Connector
Pin Definitions
Pin Number Definition
13 +3.3V
14 -12V
15 COM
16 PS_ON#
17 COM
18 COM
19 COM
20 Res(NC)
21 +5V
22 +5V
23 +5V
24 COM
Pin Number Definition
1 +3.3V
2 +3.3V
3 COM
4 +5V
5 COM
6 +5V
7 COM
8 PWR_OK
9 5VSB
10 +12V
11 +12V
12 +3.3V
Pins #
1
2 & 3
4
Definition
+12V
Ground
NC
+12V 4-pin PWR
Connector
(J38)
Additional
Connection
Pin
Number
1
2
3
4
5
6
Definition
+5V
CIRRX
IRRX
Ground
IRTX
NC
Infrared Pin
Definitions
(J16)
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