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NI PCI-5421
NI PCI-5421

NI PCI-4462

Product Name:​ PCI-4462 24-Bit Dynamic Signal Acquisition Device
Product Introduction:​ High-precision 4-channel DSA module dedicated to audio, NVH and vibration acquisition using 24-bit sigma-delta converters with 118 dB dynamic range.
Category:
Description
Technical Specifications:
  • Bus Interface:​ PCI 2.2, 3.3 V or 5 V compliant
  • Analog Input:​ 4 simultaneous differential channels, 24-bit resolution, up to 204.8 kS/s aggregate
  • Input Ranges:​ ±316 mV to ±42.4 V via six programmable gains
  • Coupling:​ Software-configurable AC/DC
  • IEPE:​ 0, 4, 10 mA excitation per channel, TEDS capable
  • Dynamic Range:​ 118 dB
  • Amplitude Flatness:​ ±0.1 dB DC to 92 kHz
  • THD:​ typical -107 dB
  • Input Impedance:​ 1 MΩ || 240 pF with IEPE on
  • Connectors:​ Front-panel BNC or SMB, rear 68-pin
  • Operating Temperature:​ 0 °C to 50 °C
  • Dimensions:​ 6.9 in × 3.9 in
    Functional Features:​ Hardware antialiasing filter auto-adjusts with sample rate, multimodule synchronization via RTSI with <0.1° phase mismatch, NIST-traceable calibration.
    Application Scenarios:​ Microphone array recording, NVH analysis, accelerometer-based predictive maintenance, calibration lab frequency-domain measurement.
    Working Principle:​ Differential input buffered, gained, filtered by fixed analog AA filter then delta-sigma ADC with digital decimation; IEPE current source biased through 1 MΩ load.
    Installation Requirements:​ PCI motherboard with 3.3 V or 5 V key, ferrite-shielded sensor cables, earth-grounded chassis for best noise floor.
    Usage Notes:​ Always configure gain before applying signal; disable IEPE for non-IEPE sources; 204.8 kS/s limits bandwidth to ~92 kHz usable.
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