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October 2, 2014

ITX ATX and WTX Power Supply Connector Pinout for 20 and 24 pin systems. Also the pinout for the 8 pin processor connector

DC Input mini-ITX style power supply, 12 volts input
Click here for DC Input mini-ITX Style power supplies
12 volt input ATX dc to dc power supply for cars, busses, boats, and solar installationsClick here for 12 Volts DC Input ATX Power Supplies suitable for use in cars 24 volt input ATX dc to dc power supplyClick here for 24 Volts DC Input ATX Power Supply   48 volt input ATX dc to dc power supplyClick here for 28 volts DC input ATX Power Supply

For more DC/DC converters from PowerStream click here: More DC/DC Converters

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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.


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Pinout for ITX, ATX computer power supplies

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