NI SCXI-1141 8-Channel Elliptic Lowpass Filter Module

The NI SCXI-1141 is an 8-channel elliptic lowpass filter module developed for the SCXI signal conditioning platform. It features programmable cutoff frequencies and high stopband attenuation, effectively eliminating aliasing noise and high-frequency interference before analog signals are sent to DAQ acquisition boards.

This legacy measurement module must be installed inside compatible SCXI chassis and cooperates with NI DAQ hardware. It is widely used for maintenance replacement and spare stocking of vibration testing, dynamic signal acquisition and old laboratory measurement systems.

Main Specifications

• Brand: NI (National Instruments); Model: SCXI-1141; Type: Elliptic Lowpass Filter Module
• Channel Quantity: 8 independent filter channels for analog input signal conditioning
• Cutoff Frequency: Programmable options include 4 Hz, 10 Hz, 100 Hz, 1 kHz and 10 kHz
• Filter Performance: High stopband attenuation above 80 dB to suppress aliasing noise
• Signal Bandwidth: Suitable for low and medium frequency dynamic analog measurement signals
• Operating Environment: 0℃ ~ +50℃, 5%‑95% RH non‑condensing
• Certifications: CE, conform to laboratory and industrial EMC measurement standards

Core Functions

• Perform anti-aliasing lowpass filtering on dynamic analog signals to improve data acquisition accuracy.
• Support software selection of cutoff frequency to match different sensor signal bandwidth requirements.
• High attenuation elliptic filter structure provides sharp roll-off and excellent noise suppression capacity.
• Standard SCXI plug-in structure supports flexible collocation with various signal conditioning modules.
• Reduce high-frequency electromagnetic interference generated by motors, inverters and other on-site equipment.
• Compatible with traditional NI-DAQ drivers and LabVIEW for test configuration and automated measurement.

Application Scenarios

• Vibration, noise and dynamic strain testing benches for automotive and aerospace industries.
• Retrofit and spare replacement of legacy NI SCXI dynamic data acquisition systems.
• Laboratory material dynamic performance testing and structural fatigue measurement equipment.
• Industrial equipment condition monitoring and mechanical fault diagnosis test platforms.
• Spare inventory for test integrators, calibration labs and engineering maintenance teams.

• Global aftermarket spare supply for teams maintaining NI discontinued DAQ measurement hardware.