Model Explanation PXI-4462

PXI: 3U PXI bus specification

4462: DSA series, 4-channel high-resolution analog input

Full name: PXI Sound and Vibration Module

Compatibility: PXI chassis (3U), used in conjunction with LabVIEW / DAQmx.

Technical parameters

Manufacturer: National Instruments (NI, now part of Emerson)

Channels: 4 synchronous sampling analog inputs (differential / pseudo-differential)

Resolution: 24-bit Δ-Σ ADC

Sampling rate: Up to 204.8 kS/s/channel

Input range (software selectable): ±0.316 V, ±1 V, ±3.16 V, ±10 V, ±31.6 V, ±42.4 V

Coupling: AC/DC per channel independently configurable

Impedance: 1 MΩ (differential)

Dynamic range: Typical 120 dB

THD: Typical -100 dB

Crosstalk: Typical -100 dB

IEPE excitation: 0 mA / 4 mA / 10 mA (software selectable)

Bandwidth: DC–92 kHz (anti-aliasing filter)

Connectors: Front panel 4×BNC

Operating temperature: 0°C ~ +55°C

Size: 3U PXI standard size

Interfaces and communications

Bus: PXI backplane (clock, trigger, data)

Front end: 4×BNC analog input

Trigger: Supports analog/digital trigger, multi-module synchronization

Software: NI-DAQmx, LabVIEW, Sound and Vibration Toolkit

Core functions

High-precision dynamic signal acquisition: 24-bit + 120dB dynamic range, suitable for weak vibration/acoustic signals.

IEPE sensors direct compatibility: Built-in constant current source, directly drives accelerometers, microphones.

Flexible range and coupling: 6 voltage ranges, AC/DC switch, suitable for voltage/charge type sensors.

Synchronization and trigger: Multi-card synchronization, external trigger, supports multi-channel parallel testing.

Anti-aliasing filter: Hardware low-pass, ensures frequency domain measurement accuracy. Application scenario

Automotive: NVH (noise, vibration and acoustic roughness) testing, engine / chassis vibration analysis.

Aerospace: Structural vibration, modal analysis, sensor calibration.

Audio: Speaker/microphone frequency response, distortion, noise testing.

Industrial: Equipment condition monitoring, bearing fault diagnosis, strain / pressure dynamic measurement.

Installation and maintenance Installation

Insert the PXI 3U slot and fix the panel; use BNC connectors for sensors / signal sources.

Install the NI-DAQmx driver, and LabVIEW will automatically recognize and configure it. Maintenance

Regular maintenance: Inspect BNC connectors, shield grounding, and chassis fan cooling.

Calibration: The original factory no longer offers calibration services. Calibration is based on historical records of used parts. Fault diagnosis

No signal: Check IEPE current settings, BNC connection, and sensor power supply.

High noise: Confirm shielding grounding, keep away from strong electricity, and remove AC coupling to filter out DC.

Asynchronous: Check the connection of PXI clock/trigger lines.