Configuring the Xenta 102-AX to accept a 4-20 mA CO2 sensor input on Universal Input 3. A negative value is required on the CO2 offset value, but it is not possible to edit the scaling of the input in StruxureWare.
The Xenta 102-AX universal inputs are designed to work with a 0-5V input. The best option is to always buy a CO2 sensor that is compatible. However, if 4-20 mA CO2 sensors have already been purchased and installed, they can be made to work.
At this point, if you have values entered in for the Airflow Reset or CO2 Low Limit and CO2 High Limit then the Airflow reset will be active and operational.
Also, if you have multiple CO2 sensors on multiple 102-AXs then you don't have to have a CO2 Curve Function Block program for each one. You can just edit the existing CO2 Curve program and copy/paste the exiting Function Block program multiple times in the same Function Block program. You would just need to rename each public point with a unique name.