The National Instruments 781345-01 is an advanced 8-channel PXI Express Strain/Bridge Input Module, also known as the PXIe-4331, specifically engineered for high-speed data acquisition and precise signal conditioning. Ideal for dynamic measurements of strain, load, and pressure, this module is perfect for high-density measurement systems. It features 24-bit delta-sigma analog-to-digital converters (ADCs) coupled with analog prefiltering to ensure exceptional data accuracy and reliability across its channels. With support for simultaneous sampling, users can achieve precise synchronization and timing across multiple inputs.

Each channel of the 781345-01 is equipped with software-selectable bridge completion modes, including full, half, and quarter-bridge configurations, alongside shunt calibration and internal/external calibration options to enhance measurement fidelity. Programmable excitation voltages ranging from 0.625 V to 10 V meet diverse sensor requirements, while features such as remote sensing and short-circuit protection further bolster measurement reliability.

The module offers extensive filtering capabilities, incorporating antialiasing and digital filters to minimize noise and enhance signal integrity. With a FIFO buffer size of 1,023 samples, it enables efficient data transfer through Direct Memory Access (DMA) or Programmed I/O, supporting a broad spectrum of sampling rates from 1 S/s to 102.4 kS/s, allowing users to customize the data acquisition process as needed.

Designed for robust performance, the 781345-01 operates within an ambient temperature range of 0 °C to 55 °C and can handle storage temperatures as low as -40 °C. Built to stringent safety and electromagnetic compatibility standards, this module is suitable for various industrial and laboratory environments. Featuring a compact 3U PXIe form factor, it integrates seamlessly into PXI Express or hybrid slots. The module dimensions are 16 cm × 10 cm (6.3 in. × 3.9 in.) with a weight of 152 g (5.3 oz), and it can be commissioned at a maximum altitude of 2000 meters above sea level, ideally performed by qualified personnel. For further details, please refer to the user manual for the 781345-01 module.