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Custom design and manufacture of state-of-the-art battery chargers, UPS, and power supplies for
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Pin for 20 pin connector
Purpose
Wire Color
......
Alternate
1
+3.3Vdc
Orange
2
+3.3Vdc
Orange
3
GND
Black
4
+5Vdc
Red
5
GND
Black
6
+5Vdc
Red
7
GND
Black
8
PWR-OK
Gray
9
+5Vdc VSB standby Voltage
Purple
10
+12Vdc
Yellow
11
+3.3Vdc
Orange
Brown may represent 3.3Vdc sense
12
-12Vdc
Blue
13
GND
Black
14
PS-ON
Green
Shorting this to ground turns on the supply
15
GND
Black
16
GND
Black
17
GND
Black
18
-5Vdc
White
19
+5Vdc
Red
20
+5Vdc
Red
For 24 pin systems use the following table:
Pin for 24 pin connector
Purpose
Wire Color
......
Alternate
1
+3.3Vdc
Orange
2
+3.3Vdc
Orange
3
GND
Black
4
+5Vdc
Red
5
GND
Black
6
+5Vdc
Red
7
GND
Black
8
PWR-OK
Gray
A signal from the Power Supply saying that the output voltages are within range
9
+5Vdc VSB standby Voltage
Purple
10
+12Vdc
Yellow
11
+12Vdc
Yellow
12
+3.3Vdc
Orange
13
+3.3Vdc
Orange
14
-12Vdc
Blue
15
GND
Black
16
PS-ON
Green
Shorting this to ground turns on the supply
17
GND
Black
18
GND
Black
19
GND
Black
20
-5Vdc
White
21
+5Vdc
Red
22
+5Vdc
Red
23
+5Vdc
Red
24
GND
Black
Pin
Purpose
Color
Notes
1
+12V digital
white
2
+12V digital
wite
3
+12V digital
white
4
sense wire
senses the voltage at the connector for feedback to the power supply
5
0 V
black
ground
6
0 V
black
ground
7
0 V
black
ground
8
sense ground
return for the voltage sense return
Note: To turn on the power supply Pin 14 must be attached to GND (Pins 13, 15, 16, or 17). Note: Many
of these converters need a minimum current draw on at least one of the power pins to operate in regulation.
Click here for 24 Volts DC Input ATX Power Supply
