The NI PXI-4498 is a 16-channel, 24-bit sound and vibration data acquisition module for high-channel count precision measurement applications. It delivers simultaneous sampling across all channels at rates up to 204.8 kS/s with 114 dB dynamic range and built-in antialiasing filters that automatically adjust to the configured sampling rate. The module provides software-selectable IEPE conditioning (0 mA or 4 mA), TEDS read/write support for smart sensor integration, and gain settings up to +30 dB. Input coupling is AC with a 0.5 Hz cutoff frequency, and four software-selectable input ranges (±0.316 V to ±10 V) accommodate diverse sensor outputs. External digital triggering accepts 5 V TTL/CMOS signals with selectable edge detection, and the module synchronizes to the PXI 10 MHz reference clock via onboard PLL circuitry. IEPE sensor diagnostics include open and short circuit detection. The hybrid-slot design operates in both PXI Express hybrid slots and standard PXI slots, using two 4X InfiniBand connectors for signal routing—each carrying eight analog input channels.
Technical Specifications
Analog Inputs
• 16 simultaneous channels, 24-bit resolution
• Sampling rate: up to 204.8 kS/s per channel
• Dynamic range: 114 dB
• Input ranges: ±0.316 V, ±1 V, ±3.16 V, ±10 V
• Gain settings: 0 dB, +10 dB, +20 dB, +30 dB (software-selectable)
• AC coupling with 0.5 Hz cutoff frequency
• Alias rejection (minimum): 104 dBc
• Alias-free bandwidth: DC to 0.4535 ƒs (default) or DC to 0.4 ƒs (with Low-Frequency Alias Rejection enabled)
Signal Conditioning
• Software-selectable IEPE excitation: 0 mA or 4 mA constant current
• IEPE sensor diagnostics with open/short circuit detection
• TEDS read/write capabilities for transducer electronic data sheets
• Built-in antialiasing filters with automatic sampling-rate adjustment
Timing & Synchronization
• Sample clock locks to PXI/PXIe 10 MHz reference (PXI_CLK10) via onboard PLL
• External digital triggering with 5 V TTL/CMOS compatibility
• Trigger sources: analog input channel, external digital trigger, or PXI trigger bus
• Selectable rising or falling edge detection
• Acquisition before and after trigger condition support
Interfaces
• Two 4X InfiniBand connectors (AI0-7 and AI8-15)
• Programmable Function Interface (PFI) for digital trigger input
Power Consumption (Typical)
• +5 V: 800 mA
• +3.3 V: 1700 mA
• +12 V: 400 mA
• –12 V: 100 mA
– Key Features
• Hybrid-slot compatibility for PXI Express and standard PXI chassis
• 114 dB dynamic range enables low-noise vibration and acoustic analysis
• Automatic filter adjustment maintains alias-free performance across sampling rates
• Integrated IEPE excitation eliminates external conditioning hardware
• TEDS support streamlines multi-sensor deployments and configuration management
– Typical Applications
• Acoustic and vibration monitoring on machinery and structures
• High-channel count condition monitoring and predictive maintenance
• Modal analysis and structural health assessment
• Sound pressure level and vibration velocity measurements
– Compatibility & Integration
• Software: NI Sound and Vibration Measurement Suite, LabVIEW, LabVIEW Real-Time, LabWindows/CVI
• Accessories: BNC-2144, InfiniBand 4X to 8 BNC adapter
