NI-9234 (C Series 4-channel IEPE vibration/sound acquisition module)

Model: NI-9234 (779680-01/03) | Type: 24-bit, 4-channel synchronous, IEPE/AC/DC, vibration/sound-specific | Status: In stock (Active)

I. Basic Specification

Full name: 4-Channel, 51.2 kS/s/CH, ±5 V, 24-Bit C Series Sound and Vibration Input Module

Channels: 4 differential analog inputs (synchronous sampling), BNC interface NI

Platform: C Series, for CompactDAQ / CompactRIO / USB-9162 single-module box

Usage: IEPE accelerometer, microphone, vibration/noise testing, condition monitoring, order tracking, audio analysis

Core Highlights: 24-bit high resolution, 102 dB dynamic range, software IEPE (2 mA), automatic anti-aliasing filtering, TEDS sensor plug-and-play

II. Core Specifications (24 bit, Synchronous)

✅ Analog Input (AI)

Resolution: 24 bit (Δ-Σ), no bit loss

Channels: 4 differential, synchronous sampling (each channel has an independent ADC)

Input range: ±5 V (fixed)

Sampling rate: 1.652 kS/s ~ 51.2 kS/s/CH (software programmable)

Coupling: Software selectable AC (0.5 Hz) / DC

Dynamic range: 102 dB (typical)

Anti-aliasing: Built-in automatic adjustable low-pass filter (automatically matched with sampling rate)

✅ IEPE Conditioning (Critical)

Excitation: Software switch 0 mA (off) / 2 mA (IEPE on)

Compliance Voltage: Maximum 19 V, compatible with most IEPE sensors

TEDS: Compatible with IEEE 1451.4 intelligent sensors (automatic reading of ID / calibration)

✅ Accuracy (25 ℃, typical)

Signal-to-Noise Ratio (SNR): 102 dB

Total Harmonic Distortion (THD): <‑95 dB

Offset / Gain Error: Factory calibration, NIST traceable

III. Software and Drivers

Driver: NI-DAQmx

Support: LabVIEW, Sound and Vibration Assistant, Python, C#

System: Windows, Linux, Real-Time (CompactRIO)