analog output with SCC-C020 in SC-2345

[mohamed ameur]

I use SC-2345 with SCC-PWR01 for signal conditioning analog input/output.
for AI, I use the SCC-0120 current input module
for AO, I use the SCC-C020 isolated current output module.
when I try to test these modules with MAX. for the AI. it works.
but for the AO it does't.so, what the problem.
for the SCC-C020, what's the positive and negative pin.is it the 1, 2 or 3. because I don't understand it in the User manual.

[RIO-Todd]

Hey Mohamed,

For driving loads, you will want to connect the load between terminals 2 and 3. Terminal 3 can be viewed as the current+ output and terminal 2 can be viewed as the current- output.

Terminal 1 is usually only used if you're going to be using an external voltage supply and the SCC-CO20, so you shouldn't have to worry about terminal 1.

I hope this helps.

Regards,

Todd D.
NI Applications Engineer

[<Mike Ross> mross@smpcorp.com]

I haven't tested AO channels, but I know if you want to monitor a digital output channel you have to wire it up to a digital input channel to see the results. My guess is that you cannot monitor AO channels directly, but you must send it to an AI channel to see the results.

Personally I would want to check any analog output with a scope if it is "mission critical."