Wiring an isolator between an AI and a 2-wire transmitter

Hey guys! I want to install a 3-way signal isolator between an analog input module (6ES7331-7KF02-0AB0) and a 2-wire transmitter. I know the proper wiring of an AI module and transmitter based on the S7 manuals but I’m not sure about the wiring in the case of adding a signal isolator. However I have considered two different wiring diagrams as shown in attached file. Could you take a look at them and give me some advice on how to do to the wiring? Should I implement Figure-1 or Figure-2?

Thank you Marcjan! The isolator catalog is attached.

As you can see it needs a 24 VDC power itself and since the input and output are separated I don’t think it can provide the loop. What do you think?

Ariya Man

Hey guys! I want to install a 3-way signal isolator between an analog input module (6ES7331-7KF02-0AB0) and a 2-wire transmitter. I know the proper wiring of an AI module and transmitter based on the S7 manuals but I’m not sure about the wiring in the case of adding a signal isolator. However I have considered two different wiring diagrams as shown in attached file. Could you take a look at them and give me some advice on how to do to the wiring? Should I implement Figure-1 or Figure-2?