SCB-68 maximum Analog Input Voltage

[klaus1]

I have a SCB-68 Connector together with my 6025E PCI Card.
My question: I have connected an analog input signal between ACH2 and ACH10 (ACH10 is connected together with an 8,2k ohm resistor to ground).
What is the maximum voltage for the input?
How can I calculate this value?
thanks,
Klaus

[Richard H.]

Hi Klaus,

Using a bias resistor doesn't change the input range of the board, so it's still -10..+10V (of course you have to configure those parameters in your software, too).

I doubt that 8.2 kOhm is enough for the input resistor. In most cases higher values than this give better results.

You can learn more about this topic in this Application Note:

Field Wiring and Noise Considerations for Analog Signals
http://zone.ni.com/devzone/conceptd.nsf/2d17d611efb58b22862567a9006ffe76/01f147e156a1be15862568650057df15?OpenDocument

If you just need specs of your board, have a look at the manual:
http://digital.ni.com/manuals.nsf/websearch/AB6BECBCD482365286256EC900675A0F?OpenDocument&node=132100_US

Richard H.
National Instruments