8-channel differential AC input module used to convert the AC input signals to their True RMS DC values. The RMS input range can be from +150 mVrms to +10 Vrms and each channel can be configured individually. The module is a complete high-accuracy RMS-to-DC converter that calculates the true RMS DC value for any complex waveform. It also features 4 kV ESD protection, 2500 VDC intra-module isolation and +/-35 VDC surge protection.