18 power input (atx version), Power input (atx version) – Sundance SMT148FX User Manual
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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