Controlling pressure regulator with labview

[canye23]

Hello, 

I want to know if there is a way to control a digital air pressure regulator (such as festo's vppm led) by increasing/decreasing its voltage. I know that this i can do it with the use of a PLC but I would like to do it with labview and arduino as an A/D converter.

Thank you in advance

[GerdW]

Hi bill,

I want to know if there is a way to control a digital air pressure regulator (such as festo's vppm led) by increasing/decreasing its voltage.

Yes.

We use those VPPM valves in our testbenches, too.

(It doesn't matter which device is generating the voltage signal, PLC or NI-DAQ.)

I would like to do it with labview and arduino as an A/D converter.

AFAIK the Arduino will only output upto 5V. The VPPM expects a voltage signal range of 0V - 10V.

We use NI DAQ hardware…

[canye23]

Thanks for you reply, 

I know that the arduino can output only up to 5V, but using a relay for example 5-10V  i can work with 10 V. Am I right ? 

[PalanivelThiruvenkadam]

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@canye23 wrote:

Thanks for you reply, 

I know that the arduino can output only up to 5V, but using a relay for example 5-10V  i can work with 10 V. Am I right ? 

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With relay it should be quite possible.

[GerdW · Accepted solution]

Hi bill,

using a relay for example 5-10V  i can work with 10 V. Am I right ? 

The VPPM valves expect an analogue input signal.

With a relay you can create a digital (on/off) signal.

I don't know if this is sufficient for your requirements - for my testbench requirements I use DAQ hardware with ±10V output range…

What about using a simple OpAmp to amplify the Arduino output voltage with a gain of 2?

[bseguin]

Relay allows you to do only ON/OF... so only two output available.

Use the PWM instead... but you will need a transistor instead with a power supply to the desired voltage.

Benoit

[canye23]

So with the OpAmp I can amplify the Arduino's output voltage to 10V. So then I want to increase/decrease this output voltage from 0 to 10V using LabView. I think that this is possible.

[bseguin]

Yes it is possible.

Benoit

[bseguin]

With the arduino you will use the PWM... no need to have OAMP, but instead a transistor and preferably opto-coupler will be better.

Benoit

[canye23]

Hello , 

I have managed to do it by constructing a simple DAC and then by amplifying the signal with gain 2. Of course I lose in resolution but I guess that is the price I have to pay with arduino’s output. 

Thank you you all for your useful ideas