How to determine the input configuration options on a Multifunction DAQ

[leapingdog]

I am researching NI Multifunction DAQ boards using the 'interactive product compare' table, in order to select several boards for an application.  

I need to know what Analog Input 'input configuration' options are available for each board. As far as I know, AI boards may have as their input configuration options the following:

• Differential
• RSE
• NRSE
• Pseudodifferential

Currently, I have a USB-6008 and a USB-6229.

• The USB-6008's input configuration options are "Differential" and "RSE".
• The USB-6229's input configuration options are "Differential", "RSE", and "NRSE".

In summary, I can not find in NI's literature or tables any indication of what input configurations options are available for NI's multifunction DAQ boards.

Please let me know if literature is available, and if so what parameter to look at, so I can proceed.

Thanks

[leapingdog]

I have attached a screenshot of the Measurement & Automation explorer which shows the input configuration pulldown menu.  (see attachement)

[Stefo]

If you are looking for specification what input configuration is available, I believe you should find it in family user manual (like M Series User Manual), or in detailed specification for the card.

What particular DAQ cards are you interested in?

stefo

[Joe Schmoe]

I need to research the entire NI product family, in order to size several projects.  I need Non-reference single ended (NRSE) analog input channels for some of the boards which we will be using. This information is not provided within the NI Tables.

I am assuming that if NRSE is an option within a board, then the board will also include a AISense channel.  Is this a correct assumption????????

If so, then I can look at each board's channel mapping, in order to determine the input configuration options.

Your feedback would be helpful.

Thanks....

[Ali M]

In a Non-Referenced Single-Ended (NRSE) system, all the channels are still referenced to a common point. However, the common channel in this case is not grounded. Figure 1 below shows an example of a Non-Referenced Single Ended system where all the channels are referenced to AISENSE which is not connected to system ground. Therefore, boards with AISENSE will provide the option to configure in NRSE. A comprehensive document on NI boards can be found by launching MAX>Devices and Interfaces> Right click on your device and select Device Pinouts. This will launch the NI-DAQmx Device Terminals Help document (Figure 2) where you will find multiple NI devices and you can conduct research according to your channel preferences.

Figure 1: Non-Referenced Single-Ended (NRSE)

 Figure 2: NI DAQmx Device Terminals Help

Best regards,

Ali M

Applications Engineer

National Instruments

www.ni.com/support