Inquery on USB High Speed M series Multifunctional DAQ

[jerryguo]

Hi Folks,

I'm planning to purchase one of the USB M Series Multifunctional DAQ device, I'd like to know the max sampling rate for multichannel analog inputs. For example, NI USB-6251supports 1.25Ms/s for single channel, can it support 1Ms/s for multichannel analog inputs? Thanks

Jerry

[samantham]

Hello.

The analog input sample rate for the 6251 is 1.25 MS/s for a signal channel or 1.00 MS/s for multiple channels.  The 1.00 MS/s is aggregate ... this means that the 1.00 MS/s will be divided over the number of analog input (AI) channels you decide to use.  For example, if you are using 4 AI channels, the maximum sample rate will be 1.00 MS/s / 4 = 250,000 kS/s.

[jerryguo]

Thanks for you reply.
Right now I need at least two analog inputs running at the same time and each of them requires 1MS/s sampling rate, is there any USB DAQ capable of doing that?

[samantham]

Hello,

There is currently no NI USB device that will allow for a sample clock rate of 1 MS/s for more than one channel.  There are S (Simultaneous  Sample) Series card that are 3 MS/s/chan, however these are not available in a USB form factor.  The S series cards have an analog to digital converter (ADC) for each channel.

[Dennis_Knutson]

What about the USB-5132/5133 digitizers? Only two channels but 50 or 100 Ms/s/ch.

[samantham]

Hello,

Yes, I was not considering the NI-Scope devices and limited the search to DAQ cards. The USB 5132/5133 will get you the desired sample rate of 1 MS/s for two channels.  I have linked the product page of the 5132 and its Specification documentation.

NI USB-5132

NI USB-5132 Specifications