Power Supply Connectors

Connectors Index:

* ATX Power Supply Connector
* Nuclear Instrument Modules

[ Interfacing index] [ More PSU Links]


ATX Power Supply Connector

The ATX power supply connector 20 Pin, MOLEX, Part No. 39-29-9202, 4.2mm pitch, male, PCB mounting
20 Pin, MOLEX, Part No. 39-01-2200, 4.2mm pitch, female, cable mounting.

Pin 14 has an internal pull-up to +5V. When pin 14 is grounded the power unit will come out of standby and into full operation.

ATX Power Supply Connector
Sig.Name Pin
No.
Colour
3.3V 1 Orange
3.3V 2 Orange
Common 3 Black
5V 4 Red
Common 5 Black
5V 6 Red
Common 7 Black
Pw-OK 8 Grey
5V Standby 9 Purple
+12V 10 Yellow
3.3V 11 Orange
-12V 12 Blue
Common 13 Black
PS-On (Low = On) 14 Green
Common 15 Black
Common 16 Black
Common 17 Black
-5V 18 White
5V 19 Red
5V 20 Red
Maximum supply currents for 250W ATX PSU , with power at Imax.
Sig.Name Current Power
+3.3V 14A 46.2W
+5V 25A 125W
+12V 10A 120W
-5V 0.5A 2.5W
-12V 0.8A 9.6W
Load limits
Sig.Name Limit
+5V and +3.3V combined 125W
-5V and -12V combined 10W
Suggested loads for testing
Sig.Name Current/
amps
Power/
watts
Resistance/
ohms
+3.3V 10 33 0.33
+5V 15.2 76 0.33
+12V 8 96 1.5
-5V 0.5A 2.5 10
-12 0.55 6.5 22
Total test load = 214W
Sig.Name Actual power
+5V and +3.3V combined 109W
-5V and -12V combined 9W

Nuclear Instrument Modules

Rack (female) connectors AMP / Tyco 42 way, M Series, Part number 202516-1
Module (male) connectors AMP / Tyco 42 way, M Series, Part number 202515-1

NIM Modules
Sig.Name Pin
No.
+3 volts 1
-3 volts 2
Spare Bus 3
Reserved Bus 4
Coaxial 5
Coaxial 6
Coaxial 7
200 volts dc 8
Spare 9
+6 volts 10
-6 volts 11
Reserved Bus 12
Spare 13
Spare 14
Reserved 15
+12 volts 16
-12 volts 17
Spare Bus 18
Reserved Bus 19
Spare 20
Spare 21
Reserved 22
Reserved 23
Reserved 24
Reserved 25
Spare 26
Spare 27
+24 volts 28
-24 volts 29
Spare Bus 30
Spare 31
Spare 32
117 volts ac (Hot) 33
Power Return Ground 34
Reset (Scaler) 35
Gate 36
Reset (Auxiliary) 37
Coaxial 38
Coaxial 39
Coaxial 40
117 volts ac (Neut.) 41
High Quality Ground 42

[ Power Supply Connectors Index] [ PSUs from TRC]


E-mail: R.Clarke@surrey.ac.uk
Last modified: 2007 December 19th.