Hi,

I have two analog input modules 6ES7 134-6JD00-0CA1 (AI 4xRTD/TC 2-/3-/4-wire HF).

And I also have one base unit 6ES7 193-6BP00-0BA1 (with internal temperature sensor) installed on the left, and one base unit 6ES7 193-6BP00-0BA0 (without internal temperature sensor) installed on the right. I want to do internal reference junction.

My question is:

Can I use the internal temperature sensor from the base unit A1 one the left, for the reference junction one the base unit A0 on the right? It is possible possible to share this measurement?

Or do I need to buy another base unit 6ES7 193-6BP00-0BA1?

Hi,

no. To use the internal reference junction the analog input module must be placed on the BaseUnit A1.

Alternative 1:
Maybe you can switch the modules, if the current used module on A1 does not need the internal reference (and is also compatible with A0)

Alternative 2:
Use another compensation method, for example an additional PT100.

Alternative 3:
Buy another A1

regards

sancruz