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Chapter 2: Installation
2-7
Connector Definitions
ATX Power 24-pin Connector
Pin Definitions
Pin# Definition
Power Connectors
A 24-pin main power supply connector(JPW1)
and two 8-pin CPU PWR connectors
(JPW2/JPW3) on the motherboard. These
power connectors meet the SSI EPS 12V
specification. In addition to the 24-pin ATX
power connector, the 12V 8-pin CPU PWR
connector at JPW2 and JPW3 must also be
connected to your power supply. See the
table on the right for pin definitions.
Warning: To prevent damage to the power
supply or motherboard, please use a power
supply that contains both a 24-pin and 8-pin
power connectors. Be sure to connect these
connectors to the 24-pin (JPW1) and the two
8-pin (JPW2/JPW3) power connectors on the
motherboard. Failure in doing so will void the
manufacturer warranty on your power supply
and motherboard.
+3.3V
1
+3.3V
14
-12V
2
+3.3V
15
COM
3
COM
16
PS_ON
4
+5V
17
COM
5
COM
18
COM
6
+5V
19
COM
7
COM
20
Res (NC)
8
PWR_OK
21
+5V
9
5VSB
22
+5V
10
+12V
23
+5V
11
+12V
24
COM
12
+3.3V
12V 8-pin PWR Connector
Pin Definitions
Pins
Definition
1 through 4
Ground
5 through 8
+12V
Required Connection
Power LED Connector
The Power LED connector is on pins 15 and
16 of JF1. This header should be connected
to the chassis power LED connection. See
the table on the right for pin definitions.
HDD/FP UID Switch
The HDD/UID Switch connections are
located on pins 13/14 of JF1. Attach a
hard-drive LED cable to display HDD or
SATA activities. This connection can also
be used as a front panel UID (Unit Identifi
er) switch. The UID LED on Pin 7 of JF1
works in conjunction with this UID Switch.
When the user presses and releases the UID
switch, the UID LED will be turned on or off
to indicate the location of the unit. (Refer to
Page 2-11 for more details.)
2-9
Pin # Definition
13
Power LED
Pin Definitions
(JF1)
Pin# Definition
15
3.3V
16
Power LED
HDD/UID Switch
Pin Defi nitions
(JF1)
Pin# Definition
13
UID Signal/3.3V
14
HDD Active