Sundance SMT148FX - Manual (Page 21)

4.1.18 Power input (ATX version)
Power is supplied directly from an ATX style power supply connected to JP15.
Note that most off-the-shelf PC ATX power supplies have a minimum load rating for
their +12V output. Typically, this can be about 1A. Fitting a couple of cooling fans is
often sufficient. Alternatively, there are zero load power supplies available. Eg.
Lambda NV-175 series (NV1-453TTH-N3-I). Sundance are able to provide a power
harness for this model.
The fan connectors, FAN1-4, are powered at +12V.
The ATX Power Connector Pin-Out is shown here:
Main 20 pin connector:
Name Pin Pin Name
+3.3V 1 11 +3.3V
+3.3V 2 12 -12V
GND 3 13 GND
+5V 4 14 ON (input)
GND 5 15 GND
+5V 6 16 GND
GND 7 17 GND
- 8 18 -
- 9 19 +5V
+12V 10 20 +5V
Extension for BTX:
+12V +5V
+3.3V GND
User Manual SMT148FX Page 21 of 48 Last Edited: 03/08/2009 11:42:00