Description
NI PCI-4462
Technical Specifications: Bus interface: Standard PCI bus Analog input channels: 4 differential analog input channels ADC resolution: 24-bit Maximum sampling rate: 204.8 kS/s simultaneous sampling across all channels Input range: ±10 V IEPE excitation: Built-in 4mA constant current excitation for IEPE sensors Hardware anti-aliasing filter on each input channel Power supply: PCI slot power supply Operating temperature range: 0℃ ~ +55℃ Storage temperature range: -40℃ ~ +85℃ Relative humidity: 5% to 90%, non-condensing Form factor: Full height PCI add-on card with BNC connectors Protection grade: IP20
Functional Features: 4-channel synchronous high resolution dynamic signal acquisition for multi-point vibration measurement. Built-in IEPE constant current excitation power supply for piezoelectric accelerometers and IEPE microphones. 24-bit ADC delivers high resolution for low amplitude vibration and noise signals. Hardware anti-aliasing filters eliminate aliasing distortion for sampled signals. Differential input design suppresses common-mode electromagnetic noise. Continuous high-speed streaming of waveform data to host PC memory. NI-DAQmx driver compatibility and LabVIEW programming support. BNC connectors for simple connection with IEPE sensors and signal cables. Onboard self-calibration function to correct gain and offset measurement error.
Application Scenarios: Multi-point mechanical vibration monitoring, vehicle road noise testing, structural modal testing, fan and pump vibration analysis, acoustic noise mapping, bearing fault detection, aerospace component vibration test bench, industrial machinery condition monitoring.
Performance Parameters: High channel-to-channel phase synchronization for multi-point vibration measurement. Ultra low noise floor for capturing weak vibration signals from accelerometers. Low total harmonic distortion to preserve original waveform characteristics. Continuous data streaming without data loss within host PC memory bandwidth limit. Stable IEPE constant current output to power piezoelectric sensors.
Material Composition: PCB substrate: Multi-layer FR4 glass fiber epoxy printed circuit board. Core components: 24-bit multi-channel ADC chip, precision voltage reference, IEPE current source circuit, anti-aliasing filter network, PCI communication controller. Mounting bracket: Steel full height PCI bracket. Connectors: Metal shielded BNC connectors with gold-plated contacts.
Structural Features: Standard full height PCI add-on card layout. Steel rear bracket equipped with four BNC input connectors. Internal circuit separated into PCI bus interface area, multi-channel analog front end area and ADC digital processing area. Independent analog filter and IEPE excitation circuit for each input channel. Carefully separated analog ground and digital ground to reduce digital noise coupling into measurement signal. Gold plated PCI edge connector to plug into PC PCI slot.
Working Principle: PCI-4462 is inserted into PCI slot and powered by PCI bus. NI-DAQmx driver initializes hardware. When IEPE accelerometer is connected to BNC port, onboard IEPE circuit supplies constant 4mA excitation current to power sensor. Vibration or acoustic analog signal enters analog front end circuit, passes through anti-aliasing filter before entering 24-bit ADC. ADC converts analog waveform to digital samples, which are transmitted to host PC memory via PCI bus. Host software performs frequency domain analysis, FFT calculation and waveform recording. Onboard self-calibration circuit adjusts gain and offset to maintain measurement accuracy.
Installation Requirements: Power off PC before installing PCI-4462 card. Insert card into empty PCI slot and fasten steel bracket screw. Install NI-DAQmx driver software and LabVIEW environment. Connect IEPE accelerometers or microphones via shielded BNC coaxial cables. Launch NI measurement and automation explorer, run hardware self-calibration and self-test. Set sampling rate, input range and IEPE excitation enable in measurement project. Ground PC chassis reliably. Use high quality low noise BNC cables for sensor connection.
Usage Notes: Run onboard self-calibration before every precision measurement campaign. Use shielded BNC coaxial cables for sensor wiring. Wear anti-static wristband when handling the PCI card. Do not apply voltage exceeding ±10V to BNC input ports. Backup measurement project before modifying sampling parameters. Do not operate card outside rated temperature and humidity range. Prevent dust accumulation on BNC connectors and PCI edge contacts.
