what is the use of NI 9201 and NI 9263 in Compact Real time Controller (NicRIO-9024 )??

[ZohaibRamzane]

Hello Mentors,

I am doing an experiment in which i have to use a DC Supply of 5V with current range 1-20mA as an input to a PT100(Temperature Sensor). I have to measure the voltage across the PT100 too.

I have NIcRIO 9024 and the two above devices NI9021 and NI9263. I want to know can i use these cards for creating a power supply 5V,(1-20mA) and control the current within Labview and measure the voltage across PT-100 in Labview.

Can someone advise me which one is suitable for my experiment NI 9201 or 9263 and why?

[crossrulz · Accepted solution]

The 9201 is fine for measuring your voltage.  But the 9263 can only output 1mA.  You might want to look into just getting a simple 5V power supply to power your sensor.

[ZohaibRamzane]

I have 9401. Can i use this for Power Supply and control it in labview? If not, Can you recommend any other NI Module for DC/AC Power supply?

[GerdW]

Hi Zohaib,

use the NI9216 or 9217 to measure Pt100 sensors…

Or use a simple external power supply, as suggested before!

[ZohaibRamzane]

I have to choose first from available modules. I have 9201 for voltage measurement(even in mV) as suggested above. Now i need to decide about 5VDC Supply and (1-20mA) current supply to my PT100 ?? 

I think power supply will be better alone.

[cbutcher]

I also would really like a power supply C-Series module, but the specifications essentially prohibit this - this "Module Development Kit" overview lists some of the specifications that all C-Series modules must satisfy, which include maximum power dissipation and current demands.

[GerdW]

Hi Zohaib,

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@ZohaibRamzane wrote:

Now i need to decide about 5VDC Supply and (1-20mA) current supply to my PT100 ?? 

When you use a 5 V power supply you should use a resistor to limit the current through the Pt100 resistor: ~4.7kOhm will limit to ~1mA. Now you can measure the voltage across your Pt100 and, by applying basic voltage divider rules, calculate its resistance and from that the temperature. Keep in mind the resolution/accuracy of your voltage measurement to know the error (in Kelvin) you will get for this kind of measurement/calculation.

Other option: use some additional hardware to supply a know current to your Pt100 resistor: there are current surces like a LM334…

Next option: use an additional signal converter (like this) to convert the Pt100 resistance into an "industrial standard" signal of 0…10V…