21-Channel C Series VR/Hall Interface Module—The NI-9752 offers a set of automotive-style analog and digital inputs to interface with standard automotive sensors. The module includes two-channel adaptive variable reluctance (VR) sensor inputs, and two-channel Hall effect sensor or general-purpose digital inputs. You can individually configure each channel using surface-mount components with pull-up, pull-down, divide-, and resistor-capacitor (RC) lowpass filters.