National Instruments PXIe-4330 PXI Strain/Bridge Input Module

National Instruments developed the PXIe-4330 (Part Numbers: 781346-01, 194953D-02L), a simultaneous input module, for use in bridge-based sensor applications. This module guarantees fast data throughput, synchronization characteristics, and exact measurements with greater accuracy thanks to its integrated data gathering and signal conditioning capabilities. It has eight analog input channels with simultaneous sampling mode and 24-bit Delta-Sigma ADC resolution, making it perfect for high-density measurement systems.

The PXIe-4330 supports both ±100 mV/V and ±25 mV/V input ranges for signal conditioning, depending on the excitation voltage (Vex). Additionally, its CMRR of 85 dB (DC to 1 kHz) and common-mode voltage input range of ±2 V guarantee dependable operation even in noisy surroundings. The module improves data quality by providing digital filters and antialiasing for each channel to address noise interference.

Additionally, independent, programmable excitation voltages are provided for each channel to allow for flexible integration of sensors. Bridge completion options include full, half, and quarter modes, software-selectable per channel. Half-bridge completion offers a tolerance of ±500 μV/V max and stability of 2.5 μV/V per °C max, while quarter-bridge completion supports values of 120 Ω, 350 Ω, and 1 kΩ with tolerances and stability within specified limits.. The PXIe-4330 offers software-selectable shunt calibration for each channel, with the option to use internal or external referencing, for calibration reasons.

With a calibration value range of 33.333 kΩ to 100 kΩ, precise sensor readings with little drift across temperature changes are guaranteed. This module provides both analog and digital trigger choices, which are important for data collecting. Using customizable levels and trigger modes, analog triggers are reference triggers that are derived from AI <0..7>.

With software-selectable polarity and debounce filter settings, digital triggers fed from multiple PXI lines enable start or reference triggers. Using a FIFO buffer capacity of 1,023 samples, the PXIe-4330 allows data transfers via programmed I/O or direct memory access (DMA). To accommodate various application needs, sample rates are available in steps of 1 S/s to 100 S/s and 100 S/s to 102.4 kS/s.