Part Code Definition

PXI = PXI bus specification;

4461 = DSA series code for 2in+2out 24-bit vibration/acquisition module

Technical Specifications

ADC/DAC: 24-bit Σ-Δ converter for all I/O channels

Analog Input: 2 fully differential synchronous sampling channels; max sample rate 204.8kS/s, alias-free bandwidth DC~92kHz; 6 programmable gain options(0.1/1/3/10/30/100×); input range ±316mV~±42.4V; software selectable AC/DC coupling, fixed 3.4Hz analog high-pass filter; built-in IEPE 4mA constant current excitation for accelerometer/microphone

Analog Output: 2 synchronous update AO channels, same 24bit resolution, output bandwidth up to 92kHz for excitation/shaker drive stimulus signal

Dynamic Range: Typical 118~120dB full scale for input, ultra-low noise for weak acoustic/vibration signal capture

Operating Temp: 0~55℃ operation, -20~70℃ storage; RH 5%~95% non-condensing

Power Consumption: ~7.2W via PXI backplane 5V supply

Interface & Communication Configuration

Front Panel I/O: 4×BNC female connectors(2AI+2AO), 1×SMB external digital trigger input terminal

Backplane Bus: Standard PXI peripheral slot, access PXI trigger bus & 10MHz reference clock for multi-card synchronous cascade expansion; hybrid slot compatible for PXIe hybrid chassis slot mounting

Driver Support: NI-DAQmx + NI-Sound and Vibration toolkit, compatible with LabVIEW, LabWindows/CVI, TestStand; supports FFT, FRF, swept-sine stimulus-response test

Core Functions

1.Onboard IEPE constant current power supply for IEPE accelerometer, condenser microphone without external signal conditioner

2.Simultaneous signal generation & acquisition for FRF frequency response, swept sine vibration stimulus test

3.Hardware anti-alias filter eliminates out-of-band aliasing noise for accurate FFT spectrum analysis

4.AC/DC switchable coupling: AC for vibration/acoustic, DC for static transducer DC offset measurement

5.Multi-module synchronous cascade via PXI trigger bus to expand multi-channel vibration test system

Application Scenarios

Automotive NVH noise & vibration testing, speaker/audio component acoustic parameter calibration, rotating machinery predictive maintenance vibration monitoring, aerospace structural modal analysis, laboratory acoustic research & transducer characteristic test, legacy PXI vibration test bench spare replacement

Operation & Maintenance Notes

Use double-shield BNC coaxial cable for sensor wiring to reduce EMI interference; preheat module 30min before precision spectrum test; avoid overvoltage exceeding max 42.4V input rating; keep BNC connector clean from dust; regular annual external factory calibration to guarantee dynamic range accuracy.