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S
S
S
UPER
TORAGE
5-8
Connector Definitions
Power Connectors
A 24-pin main power supply connec-
tor (JPW1) and two 8-pin CPU power
connectors (JPW2/3) and a 4-pin
connector (JPW4) must be connected
to the power supply. These power
connectors meet the SSI EPS 12V
specification. See the table on the
right for pin definitions.
Warning: To provide adequate power
supply to the serverboard, be sure to
connect JPW1 and both JPW2 and
JPW3 to the power supply. Failure
to do so will void the manufacturer
warranty on your power supply and
serverboard.
Secondary Power Connector
JPW2 and JPW3 must also be con-
nected to the power supply. See the
table on the right for pin definitions.
Power Button
The Power On connection is on pins
1 and 2 of JF1 for connection to the
chassis power button. This button
can also be configured to function as
a suspend button (with a setting in
BIOS). To turn off the power when in
suspend mode, press the button for 4
seconds or longer. See the table on
the right for pin definitions.
Reset Button
The Reset Button connection is
located on pins 3 and 4 of JF1 and
attaches to the reset switch on the
computer chassis. See the table on
the right for pin definitions.
YSTEM 2027R-E1CR24L User's Manual
ATX Power 24-pin Connector
Pin#
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
+12V 8-pin Power
Pins
Definition
1 - 4
5 - 8
Required Connection
Pin Definitions (JF1)
Pin#
1
2
Pin Definitions (JF1)
Pin#
3
4
5-16
Pin Definitions
Pin #
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
Pin Definitions
Ground
+12V
Power Button
Definition
Power Signal
Ground
Reset Button
Definition
Reset
Ground
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