I. Basic Information

Product Name: PCI-4451

Manufacturer: National Instruments NI

Product Type: PCI Bus Dynamic Signal Acquisition Card DSA

Status: Out of Production. No new stock available after 2026.

Alternative Model: PXIe-4451

II. Main Applications

Vibration testing, acoustic measurement, noise analysis, audio testing, modal analysis, industrial equipment fault diagnosis

III. Analog Input

Number of channels: 2 differential synchronous sampling

Resolution: 16-bit Delta-Sigma ADC

Sampling rate: 5kS/s to 204.8kS/s programmable

Bandwidth: DC to 95kHz

Dynamic range: 90dB

Total harmonic distortion: -90dB at 1kHz

Input coupling: Software selectable AC/DC

Input range: ±10V standard

IV. Analog Output AO

Number of channels: 2 synchronous update

Resolution: 16-bit

Update rate: Up to 51.2kS/s

Output range: ±10V

Bandwidth: DC to 20kHz

V. Digital IO and Counter

Digital IO: 8 channels 5V TTL bidirectional

Counter: 2 channels 24-bit for pulse encoding and frequency measurement

VI. Synchronization and Triggering

Triggering methods: Software triggering, hardware triggering, external triggering

Synchronization bus: Supports RTSI bus, multi-card synchronization

Anti-aliasing: Built-in high-order low-pass filter, no need for external filtering

VII. Electrical and Mechanical

Bus interface: PCI 2.0 32-bit 33MHz

Board size: Standard PCI half-length card, full-height

Power supply: PCI slot 5V no external power supply required

Operating temperature: 0 to 55 degrees Celsius

Relative humidity: 10% to 90% no condensation

VIII. Software Support

Drivers: NI-DAQmx compatible with LabVIEW, LabWindows/CVI, Visual Studio

Operating systems: Windows XP, 7, 10 32/64-bit

IX. Key Features

16-bit high precision, low noise, low distortion

Synchronous sampling, multi-card synchronization

Built-in anti-aliasing filter

AC/DC coupling selectable

Suitable for high-precision dynamic signal measurement