Choosing the Right External Power Supply for PXI-4110 or PXI-4130

Updated May 10, 2018

Reported In

Hardware

  • PXI-4110
  • PXI-4130
  • PXI Source Measure Unit

Issue Details

I want to use the PXI-4110 or PXI-4130 with an external power supply. How much input power is required on my external power supply based on the load I intend to use on the output of my PXI-4110 or PXI-4130?

Solution

The input power required for the PXI-4110/4130 will depend on the operating point on the output of the device. 

In each graph below, the X-Axis represents the current output of the PXI-4110/4130. The different plots represent the PXI-4110/4130 outputting different voltages. The Y-Axis represents the power required by the PXI-4110/4130 from the external power supply under these multiple conditions. 

 

  • PXI-4110 AUX Power Required vs Current Output: 



    For example, if the PXI-4110 was outputting 10V with a 0.5A load, then it would require roughly a minimum of 9W to be supplied by an external power supply.

     
  • PXI-4130 AUX Power Required vs Current Output: 



    For example, if the PXI-4130 was outputting 10V with a 0.5A load, then it would require roughly a minimum of 12W to be supplied by an external power supply.

Additional Information

The graphs above represent the different input power measurements under varying voltage and current output conditions in tests performed at 25°C. To choose the correct external power supply for your application it is recommended that you pick the maximum voltage and current that you expect to use from the output of your device. You can then reference the graph below and find the amount of power drawn by the PXI-4110/4130 from the external power supply at those levels. National Instruments recommends that you choose a power supply capable of providing extra output power in addition to the output operating point on the graphs to account for any variations in your expected max voltage or current, or other variables in your test environment. Also note these values can be used for reference whether outputting positive or negative voltages from your PXI-4110/4130.

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