The National Instruments 784277-01, also known as the PXIe-4480, is a compact 6-input sound and vibration module designed for high-precision audio, acoustic, and vibration measurement applications. This module supports independent dynamic signal acquisition across all six channels, which can be software-configured for voltage or charge measurement modes. With a 24-bit Delta-Sigma A/D converter, the module provides an extensive sample rate range from 100 samples per second to 1.25 MS/s, making it suitable for various applications including audio testing, NVH analysis, and underwater acoustic measurements.

The 784277-01 features flexible input configurations, offering selectable differential or pseudodifferential settings in voltage mode and single-ended configurations in charge mode. Users can opt for AC or DC coupling depending on their measurement needs, with AC coupling also available for charge measurements. This adaptability is essential for interfacing with diverse sensor types such as hydrophones, pressure sensors, and acoustic transducers. Additionally, the module includes IEPE excitation and supports TEDS for enhanced measurement capabilities. It can sample at rates up to 20 MS/s per channel, allowing for the capture of rapid events like blasts and pressure spikes. The unit also offers four selectable gain settings for input range configuration and boasts exceptional overvoltage protection, with levels reaching ±30 V for differential inputs and ±15 V for charge inputs.

Constructed to meet x4 PXI Express peripheral module specifications, the 784277-01 is compatible with PXI Express and hybrid slots and measures 16 cm x 10 cm (6.3 in. x 3.9 in.), with a lightweight design of 264 g (9.3 oz.). It features an InfiniBand 12x analog input connector and an SMB male digital trigger connector on the front panel, along with LED indicators for access and activity status. With an operating temperature range of 0 °C to 55 °C, this module is engineered to endure various environmental conditions and meets stringent shock and vibration standards. Safety and electromagnetic compatibility are prioritized, conforming to IEC 61010-1 and EN 61326-1 standards for reliable measurements in controlled environments. The 784277-01 is designed with user safety in mind, clearly indicating cautions against high measurement category signals. It supports a two-year external calibration interval, ensuring ongoing reliability and accuracy in critical applications.