The National Instruments NI-9231 is a high-performance Sound and Vibration Input Module designed for integration within the C Series platform. This module features eight differential analog input channels, providing a maximum sample rate of 51.2 kS/s per channel and a ±5 V input range with 24-bit resolution. The NI-9231 effectively accommodates both IEPE and non-IEPE sensors, including proximity probes, tachometers, and accelerometers, enabling versatile signal measurement. An integrated 2 mA excitation source eliminates the need for an external power supply, allowing for seamless sensor operation. The module incorporates built-in, self-adjusting anti-aliasing filters to optimize sampling rates automatically, and leverages a Delta-Sigma type ADC for simultaneous data acquisition.

With an N-Type Coaxial front connector, the NI-9231 maintains ease of connectivity and is designed for robust performance across a wide temperature range of -40 °C to 70 °C. It offers an impressive 107 dB dynamic range, ensuring precision in sound and vibration measurements. Furthermore, the module is fully compatible with TEDS sensors and features IEPE Open and Short Detection for enhanced reliability in testing environments. The NI-9231 is hot-swappable, allowing for effortless module replacement without disrupting the host system. When combined with CompactRIO, this module supports a flexible and rugged architecture suited for demanding industrial applications. For detailed instructions and maintenance, user manuals are available for download.