Directly convert the analog signals into digital without passing through FPGA

[FDFDFD]

To whom it may concern,

I am using a SCB-68 board R-series and I have a couple of technical questions:

In my system at the moment 8 analog channels are connected to the 8 input analog ports and then data are sent to a FPGA (PXI system 7852R). I am planning now to add other 4 channels to the system. Since over the total 12 channels I just need a very fast acquisition mode (using the FPGA) for 6 of them, while the other 6 can be sampled in a ms scale, I was wondering if you can suggest me something that I can use to directly convert the analog signals into digital and in this way used many unused digital signals provided with this model.

Thanks in advance.

[srm@viewpointusa.com]

you can use an R-series expansion module with that board to increase the number of analog channels brought into the FPGA.  use the appropriate c-series module to collect the rest of the channels in the expansion module.  this expansion module connects to one of the digital conectors of the fpga board

[FDFDFD]

Thanks for your answer.

Since I am having a hard time to understand which models are compatible with my system, could you please help me with this and suggest me the appropriate R-series expansion module and c-series module?

Thanks a lot.

[srm@viewpointusa.com]

NI 9151

SHC68-68-RDIO cable

NI 9205 or one of the others as appropirate

[HoussamK]

Hi

if you want to know how do you configure the R Series expansion Chassis NI 9151 for Use with an R series device just go to:

How Do I Configure the R Series Expansion Chassis for Use with an R Series Device?

What Type of Cable Should I Use to Connect to My NI 9151 Expansion Chassis?

I hope this will help

Kind regards,

[FDFDFD]

Thanks to both of you for the answer.

I have some doubts on the solution proposed by Stu McFarlane. As C-series, I figured out, I would need more than 4 channels, 16 bit of resolution, no matter what kS/s and screw terminals.

Two possible solutions can be:

1) NI 9206 (32 channels).

    I read that I should use the NI 9917 chassis instead of NI 9151. Is it still compatible with the PXI 7852R system? 

2) NI 9215 x 2 (4 channels x 2= 8 channels).

   Can I connect to the NI 9151 chassis 2 NI 9215 elements?

Which solution would you suggest among the 2?

Moreover, whenever I choose the screw terminals connectivity, I am not sure if I should select front mounted accessories or cable accessories. Both of the solution are showing me a schematic of the system that doesn't seems to me to be the correct one.

I thought that I had to have a system composed by:

software + pc + PXI + cable + chassis + C-series module

Is it correct??

Thanks again for your help.

[HoussamK]

Where did you read that I should use the NI 9917 chassis instead of NI 9151? The NI 9917 is an industrial enclosures house which protect CompactRIO sytems from harsh and dirty environments.

[HoussamK]

yes it is correct, what do you need is:

software + (pc) + PXI + cable + chassis + C-series module

With embedded controllers, there’s no need for an external PC

With PXI remote control kits, you can control PXI systems directly from desktops, laptops, or server computers.

 What Is PXI?

To configure a complete PXI System please go to: Build Your PXI System

[HoussamK]

sorry 😉

I mean:  Where did you read that you should use the NI 9917 chassis instead of NI 9151?

[HoussamK]

If you have any other questions, do not hesitate to contact National Instruments