differential connection crio

[Sesmi]

I'm using a NI 9205 in a cRIO. I can tell the project that the channel I want (AI 0, for example) is a differential connection, but when reading the outputs do I need to collect both that channel and it's matching opposite and take the difference (read AI0 as positive and AI8 as negative and then take the difference)? I currently have it set up to only read the first channel, but I can easily change it if I need to, I just don't know if I need to be reading the other channel. Should I connect all the negative channels to the common?

Thanks for the help,

Sesmi

[mikeporter]

When you configure a channel as differential, the drivers know which input makes up the other half of the connection,. For example, say you configure AI0 to be differential. Let's further stipulate that the other side of the connection is AI8.

When you connect your differential input you would connect to AI0 and AI8. But when you go to read the channel you would only read AI0 and you will get the differential reading automatically.

Mike...