Using PCI 625x for multiple PID loops

[kevinuu]

I am looking to control several [between 2 and four] PID loops with one board.  The PID output  offset will be in the 0-20V range and about  +/-1V for the actual control variance to control a bi-morph piezo. The input signal will be on the order of 50mV with an error signal of up to about the same value (50mV).  I need the PID to contol loop to run at a minumum frequency of 1kHz.

Would the PCI 6259 card, using an external reference voltage, be sufficient for this process or are there other DAQ hardware choices that would be more appropriate (and still around the same cost)?

[Marni]

Dear Kevin,

If you look at the Specs for the PCI-6259 you will see that the range for the External Reference is +/- 11V, so 20V is outside of the range. I looked through the specs for other NI boards and there aren't any boards with an analog output range that high. Good luck with your project.

Sincerely,

Marni S.