NI PXI-4472B

Product Name: 8-Channel Dynamic Signal Acquisition Module for Sound and Vibration

Product Description: The PXI-4472B is a PXI dynamic signal acquisition module optimized for acoustic and vibration measurement. It integrates IEPE signal conditioning for piezoelectric transducers and simultaneous sampling on all eight analog input channels for high-precision frequency domain measurement.

Category:
Description

Technical Specifications: Number of Analog Input Channels: 8 differential channels ADC Resolution: 24 bit Maximum Sampling Rate: 102.4 kS/s per channel Input Voltage Range: ±10 V Input Coupling: Software configurable AC / DC Highpass Filter Cutoff: 0.5 Hz Built-in Antialiasing Filter: Automatically adjusts with sampling rate Connector Type: SMB front connectors

Function Features: Simultaneous sampling on all 8 channels. Integrated IEPE constant current excitation for accelerometers and microphones. Built-in configurable antialiasing filter. Multi-module synchronization via PXI trigger bus and RTSI bus. Supports frequency analysis, FFT and dynamic spectrum measurement.

Application Scenarios: Noise and vibration testing, modal analysis, audio device measurement, machine condition monitoring, structural dynamics test, acoustic sensor calibration.

Material Composition: Front panel: Machined aluminum alloy. PCB: multi-layer FR-4 board with analog shielding layers. Input interface: SMB coaxial connectors.

Structural Features: 3U single-slot PXI module. Analog front-end shielding separates analog signal circuit from digital noise circuit.

Working Principle: Analog transducer signal enters front-end conditioning circuit. IEPE excitation power is supplied to sensors. The conditioned signal passes through antialiasing filter then 24-bit ADC for simultaneous digitization. Digital data transfers to PXI backplane for host analysis.

Installation Requirements: Insert into 3U PXI chassis slot. Use shielded SMB cables for sensor connection. Ensure chassis cooling meets thermal requirement.

Usage Notes: Select AC coupling for vibration and acoustic measurement. Do not apply overvoltage to analog input terminals. Use shielded cables to reduce environmental electromagnetic interference. Calibrate periodically to maintain amplitude and phase accuracy.

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