We only specify THD for discrete AC input modules. The 140ACI03000 is strictly 1-5VDC or 4-20mA.
This card has no additional filtering capability outside of the built in low pass filter (-3db cutoff @ 15Hz, +-20%).
If the signal is simply too noisy and can not be cleaned up before it gets to the module, you can try creating some sampling or averaging logic.
Released for:Schneider Electric Vietnam