Created Date: December 12,2008

Created by: Bob S BN

Have you looked at using signal conditioners for the inputs?

I'm not sure how many different types of TCs you are using, but it may be cost effective, and reduce rack slots used, if you went with signal conditioners and converted all TC readings to standard analog.

Here's a conditioner from Automation Direct that might do the job.

FC-T1

Signal conditioner and isolator for thermocouple signal. 24 VDC input power. Selectable inputs include Type J, K, E, R, S, T, B, N, C. DIN-rail mountable.

Just a thought,

Created Date: December 12,2008

Created by: bfitz

I had seen those and considered that route. The drawback with those devices is that it is another DA-AD conversion in the signal path. It would add another error source (and be another part to fail, or drift). For those reasons, I prefer a thermocouple card vs. a signal conditioner.

Thanks for the suggestion,

Brian

Created Date: December 11,2008

Created by: bfitz

I am currently working on a project that will be using several different thermocouple types. It would have been nice if the D2-04THM modules allowed multiple types of themocouple inputs on the same card. As it is currently configured, my project will have one card with only one T/C on it (oddball type of T/C) and the other three inputs unused. Perhaps in a future revision of the D2-04THM module, the ability to mix T/C types should be considered.

Thanks,

Brian