Description
1. Product Title
National Instruments NI‑9234‑ 4‑Channel C‑Series Sound and Vibration Input Module
2. Product Overview
The NI‑9234 is a high‑performance simultaneous‑sampling dynamic signal acquisition module for NI CompactDAQ and CompactRIO platformsNI. It supports both IEPE accelerometers, microphones and non‑IEPE transducers such as tachometers and proximity probes, delivering 24‑bit high‑resolution measurement for vibration and acoustic signals. NI‑9234 provides software‑selectable 2 mA IEPE excitation current plus configurable AC/DC coupling. Each channel integrates auto‑adjusting anti‑aliasing filters that adapt according to sampling rate to suppress aliasing noise. It enables frequency‑domain analysis, order‑tracking and modal testing, capturing reliable dynamic waveform data for rotating‑machinery diagnostics and structural health evaluation, reducing measurement distortion in noisy industrial test environments.
3. Technical Specifications
- Brand: National Instruments (NI)
- Model: NI‑9234
- Warranty: One Year
- Condition: 100% New & Original
- I/O Type: 4‑channel differential analog input, simultaneous sampling per‑channel
- ADC Resolution: 24‑bit Delta‑Sigma ADCdownload.n…
- Max Sampling Rate: 51.2 kS/s per channelNI
- Input Voltage Range: ±5 V
- IEPE Excitation: Software‑selectable 0 mA / 2 mA per channel
- Coupling: Software‑selectable AC / DC coupling
- Dynamic Range: 102 dB typical
- Sensor Compatibility: IEPE accelerometer, microphone, TEDS smart sensor, non‑IEPE transducers
- Connector: 4 × BNC front‑panel connectors
- Operating Temp: ‑40 °C to +70 °CNI
- Over‑voltage Protection: ±30 V per channel
- Compatibility: CompactDAQ, CompactRIO C‑Series chassis
- Compliance: CE, UL, cUL certified
5. Application Scenarios
- Rotating‑Machinery Condition Monitoring: Integrated into CompactRIO racks for vibration data acquisition on turbines, compressors and large pumps, supporting predictive‑maintenance fault diagnosis.
- NVH & Structural Vibration Test Bench: Deployed with CompactDAQ hardware for modal analysis, noise‑vibration‑harshness testing of mechanical assemblies in product validation workflows.
- Industrial Acoustic Measurement System: Used for machinery noise testing and field acoustic logging, capturing high‑fidelity sound‑pressure signals from IEPE microphones in factory test environments.
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