Ni Module Suggestion

[wew044]

Hi Ni Experts,

I am having trouble deciding which NI module suits me better. I am trying to do data acquisition temperature, pressure, and valve. In addition to that I need to implement PID controls (for example, valve will respond to  pressure setpoint). 

I seem some examples where people have used NI-9220, 9201, USB-6216 to do this because they have the "control" capability where as the USB-6003 for example, does not. 

Could anyone provide some advice/comment on the NI-9xxx series or the USB-6xxx series as to which one I should go with? 

[Niki.B]

Hello,

The NI 9220 and NI 9201 are both C series voltage input cards.  If you want to do output control, that would require the use of a different card.  The different between these two cards is the number of channels available and the maximum sampling rate.  Those specifications can be found in the specification sheets for the two devices.

The USB 6212 is a multifunction I/O device that is less rugged than the C series devices. However, it has analog input, digital input and output, and counters available.  The sampling rate of this device is also lower than the C series devices but depending on your application, may be adequate.

[pipipi0405]

If you want to get temperature, pressure, and valve open/close conditions and also do PID, it depends on how responsive you want your PID to be. 

If you want deterministic control, you should choose CompactRIO controller with DAQmx such as cRIO-9057 and put in modules that acquire temperature, pressure, and valve DIO data within the controller. 

If you have some pre-amp that converts sensor temperature or pressure data to voltage, then you just need an analog input module such as NI 9205. 

For more info, I suggest you contact your local NI office.