digital input/ouput: relationship between input values and output values

[luojh135]

Hi, could someone tell me when using the digital lines of NI daqmx device (PXIe 6358, if it is device dependent), what's the transision value of the inputs that will change the output from 0s to 1s?

Suppose, I write an array of 10 number ranging from 0 to 9, what will be output be look like?   

thanks.

[James.M · Accepted solution]

This is device specific, but you will see a pattern of the same values across many devices. From the datasheet for your PXIe:

• Positive-going threshold: 2.2V
• Negative-going threshold: 0.8V

So 0-9V, it depends which direction you're going. It's a gray area between 0.8V and 2.2V because the value won't switch until the threshold value respectively.

Going from False to True, you will need to read in a value greater than 2.2V. Going from True to False, you will need to read in a value less than 0.8V

This image does a good job of depicting this. See red line (positive-going) and green-line (negative-going).

Your title says "Output" along with Input. The above info is regarding digital inputs. The Output functionality will output either 0V or 5V.

[crossrulz]

Ok, you lost me when you started talking about an array of numbers.  Perhaps you can clearify what you mean.