Part Code Definition

NI: Brand; 9234: 4-channel vibration acquisition C module;

779680-01: Standard normal temperature version (0 - 55℃, without anti-seepage coating);

779680-03: Wide temperature anti-seepage coated version (–40 - 70℃, dew and dust protection). Technical Specifications

4-channel fully differential synchronous analog input, 24-bit ADC; single channel maximum 51.2kS/s synchronous sampling; input range ±5VDC;

Software single channel can optionally select 0mA/2mA IEPE constant current excitation, AC (0.5Hz high-pass)/DC coupling switching;

Built-in sampling rate adaptive anti-aliasing filter, total dynamic range 102dB; supports TEDS sensor automatic parameter identification;

Channel ground withstand voltage ±30V (CAT I); protection IP40; operating temperature range: standard version 0~55℃, triple protection version -40~70℃; resistant to 5g random vibration, 30g impact; net weight 173g. Interface & Communication Configuration

Front panel: 4-channel BNC signal interface; C series internal bus;

Matched with cDAQ‑9178/9179 (USB chassis), cRIO‑903x/904x real-time chassis, USB‑9162 portable base;

Compatible drivers: NI‑DAQmx, Sound and Vibration toolkit; Compatible with LabVIEW, LabWindows/CVI, Python, TestStand, LabVIEW RT real-time system NI. Core Functions

IEPE accelerometer/microphone signal acquisition, vibration spectrum analysis, order tracking, rotational speed synchronization test, equipment online status monitoring, noise acoustics testing, TEDS sensor automatic manual calibration-free; hardware automatic filtering to suppress spectral aliasing, synchronous clock trigger for acquisition within multi-module chassis. Application Scenarios

Whole vehicle NVH noise and vibration tests, fault diagnosis of fans / motors / gearboxes, chassis bench tests, laboratory acoustic calibration, online equipment inspection on production lines, and onboard vibration inspection for construction machinery. Operation & Maintenance Notes

Use double-layer shielded BNC coaxial cable for wiring; for long-distance measurement points, AC coupling is used to filter out DC drift; idle channels are turned off with 2mA IEPE excitation to save power; the BNC metal casing avoids short-circuiting and introduces ground line noise; for dusty and humid conditions, select the 779680-03 three-proof model NI.