NI PXI-4462 188261H-11L 4-Channel Dynamic Signal Acquisition Module

NI PXI-4462 with part number 188261H-11L is a 24-bit 4-channel dynamic signal acquisition module from National Instruments. It supports simultaneous sampling up to 204.8 kS/s, with built-in IEPE sensor excitation for accelerometers and microphones, dedicated for sound and vibration frequency domain measurement.

This module features software-selectable AC/DC coupling and six adjustable gain ranges, delivering 118 dB dynamic range for high-fidelity signal capture. It is fully compatible with LabVIEW and NI DAQmx drivers, widely used as spare parts for automotive NVH test benches, audio inspection and machinery condition monitoring system maintenance and upgrade projects.

Main Specifications

1. Brand: NI (National Instruments); Model: PXI-4462; Part No:188261H-11L; Type: PXI Dynamic Signal Input Module
2. Resolution:24-bit Delta-Sigma ADC; Sample Rate:1kS/s ~ 204.8kS/s; 4 simultaneous analog input channels
3. Sensor Excitation: IEPE 0/4/10mA per channel; Coupling: software selectable AC / DC
4. Dynamic Range:118 dBFS; Gain:6 configurable gain settings; BNC signal connectors
5. Bus:PXI bus; Software:LabVIEW, NI DAQmx driver, TEDS sensor support
6. Operating Temperature:0℃ ~ +55℃; Standard 3U PXI card form factor
7. Supply Status:Industrial spare DSA module for vibration and acoustic test system overhaul and replacement

Core Functions

1. Simultaneously collect vibration and acoustic signals from IEPE accelerometers and microphones.
2. Independent IEPE current excitation on each channel, supporting TEDS intelligent sensor recognition.
3. Configurable AC/DC coupling and gain settings to match different signal amplitude and frequency ranges.
4. High dynamic range and low distortion performance for precise spectrum analysis and noise measurement.
5. PXI trigger and clock synchronization, supporting multi-module cascading to expand measurement channels.
6. 3U PXI standard size, simple installation and fast replacement inside PXI chassis during maintenance.

Application Scenarios

1. Multi-channel sound and vibration measuring unit for NI PXI modular dynamic signal testing systems.
2. Fault module replacement and routine maintenance of existing NI PXI DSA test platforms.
3. Automotive NVH testing, audio device inspection, machinery vibration monitoring and modal analysis projects.
4. Emergency replacement for module failure to restore multi-channel vibration and acoustic signal acquisition.
5. Spare parts stocking for maintenance teams supporting NI PXI and LabVIEW test automation systems.
6. Aftermarket spare supply for test bench upgrade and acoustic & vibration measurement system reconstruction.

FAQ

1. Q: What is NI PXI-4462 188261H-11L used for?
   A: It is a 24-bit 4-channel dynamic signal acquisition module, used for noise, vibration and modal testing with IEPE accelerometers and microphones.
2. Q: What are typical module failure symptoms?
   A: No signal input, high noise floor, channel reading distortion, TEDS sensor identification failure, DAQmx device not detected.
3. Q: How to complete commissioning and diagnosis?
   A: Insert module into PXI chassis, connect BNC signal cables, install NI DAQmx driver, turn on IEPE power and test signal acquisition via LabVIEW.