I have the sensor QFA3171D so it's not connect to PLC , Customer just monitor value at local site.

I read user manual and see notes :

Note on connection terminals of theQFA3171(D) / QFA3173(D):
Terminals G1(+) and I1 (-) for the humidity output must always be connected to power, even if only the temperature output G2 (+) and I2(-) is used!

It's mean G1 (+) = 24V and I1(-) = 0V , Can you help me proposal about conection?

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Split from Calibration QFA3171D.

Closed cause question posted twice.

The second thread with the subject QFA3171 - Wiring Diagram Connection is published within the conference HVAC Products.

Best regards,
Jen_Moderator
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