DAQmx Based Hardware Design

[rkmashish]

Is it possible to design DAQmx compatible daq system as per our project requirment?

If yes please suggest referance document  

[Blokk]

I am not aware of such document, however I can give you a (simplified) example how I decided what to buy from NI.

Several month ago we started the planning of a new experimental rig, and I got the full list of required sensors and actuators.

This list contained the following hardware elements to be interfaced with LabVIEW:

• max 20 thermocouples (K-type, shielded TC-cables)
• 9 analogue signals to measure (absolute pressure sensors output signal 0-5V, safety indicator of a pneumatic valve-microswitch, high vacuum gauge with controller-controller outputs analogue signal 0-10V); extension can be expected later (couple of more analog channels); no need for high sampling rate, DAQ system overall rate will be 1 Hz!
• Solenoid valve to switch air to high temperature pneumatic valve (24V DC type); possible future extension--> one more similar switch might be installed later
• Dual guage vacuum sensors + vacuum pump (RS232)
• Mass flow controllers (3) + controller unit (RS232) --> need for a RS232-USB adapter

The above simplified list gave me the requirement what kind of DC PSU(s) to buy to energize the pressure sensors and the solenoid valve, etc.

After this part, I started to assemble a cDAQ system (non real-time, the nature of the experiment did not require real-time OS) using the NI website:

https://learn.ni.com/learn/article/getting-started-with-compactdaq-hardware-and-labview

I decided to use the following modules for our experiment (you can browse all the modules by measurement types at: https://www.ni.com/en/shop/compactdaq.html 😞

1. NI 9213 (16 CH thermocouples) https://www.ni.com/en-us/shop/model/ni-9213.html
2. NI 9212 (8 CH TC, isothermal terminal block for higher accuracy) https://www.ni.com/en-us/shop/model/ni-9212.html
3. NI 9209 (16 differential CHs, +-10V range, 500Hz sampling, 24bit) https://www.ni.com/en-us/shop/model/ni-9209.html
4. NI 9482 (4CH Relay) https://www.ni.com/en-us/shop/model/ni-9482.html

It is not foreseen that we need more modules later, since we have enough spare TC, AI, and Relay channels left, so I decided to buy just a 4-module sized chasses: cDAQ-9174 ( https://www.ni.com/en-us/shop/model/cdaq-9174.html )

You can use the NI website to configure the whole assembly, and get a quote for the whole:

[crossrulz]

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@rkmashish wrote:

Is it possible to design DAQmx compatible daq system as per our project requirment?

If yes please suggest referance document  

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My suggestion is to give your local NI rep a call and have a nice long sit-down to discuss your requirements and they will be able to help you figure out your system.  Alternatively, use a nearby Alliance Partner.

[natasftw]

Without knowing your requirements, nobody can say

[rkmashish]

I am asking for non-ni hardware design from scratch. which is compatible for LabVIEW and DAQmx.  

[GerdW]

Hi rk,

the answer stays the same: call your local NI sales rep and have a discussion with them face to face!

[SigRob · Accepted solution]

I believe you may be speaking of developing your own hardware which can be used by DAQmx and LabVIEW?  The DAQmx part i'm not sure about, but I did find this resource that seems to be a development kit to design your own cRIO compatible module:   https://www.ni.com/en/support/documentation/supplemental/09/product-support-for-the-crio-9951-module...

Personally, I have never needed to do such a thing, so perhaps someone else with more information will chime in.

[crossrulz]

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@rkmashish wrote:

I am asking for non-ni hardware design from scratch. which is compatible for LabVIEW and DAQmx. 

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Considering DAQmx is the driver for NI hardware, I doubt you are going to be able to do this.  But what is wrong with just using NI hardware?  By the time you invest your time into making your own, you could have just bought an NI board that does everything you need for a lot less.

[Daikataro]

As everyone has said, it is literally impossible to correctly select hardware without knowing the requirements. First ask yourself what you want to do, and what you need to do it, maybe a PLC and an OPC client would suffice, perhaps you can even get away with a PIC and some basic communication with LabView, or perhaps you will be needing a 14 slots PXI with an embebbed octa-core controller and purpose-made cards, it all depends on your needs. 

[Blokk]

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@Daikataro wrote:

As everyone has said, it is literally impossible to correctly select hardware without knowing the requirements. First ask yourself what you want to do, and what you need to do it, maybe a PLC and an OPC client would suffice, perhaps you can even get away with a PIC and some basic communication with LabView, or perhaps you will be needing a 14 slots PXI with an embebbed octa-core controller and purpose-made cards, it all depends on your needs. 

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Daikataro: I guess you did not read the last few posts 🙂 The OP is asking about to design a custom HW, which is able to use NI DAQmx driver.