NI-9237 C Series Strain / Bridge Input Module Basic Information

Model: NI-9237

Type: 4-channel 24-bit synchronous full bridge / half bridge / 1/4 bridge strain & weighing & force-torque acquisition

Status: In stock and mainstream

Applicable platforms: CompactRIO / CompactDAQ / C-series chassis

Core parameters

Channel: 4 differential, each channel independent ADC, all channels synchronized sampling

Resolution: 24 bit Δ-Σ

Sampling rate per channel: up to 50 kS/s

Input range: ±25 mV, ±50 mV, ±100 mV, ±250 mV, ±500 mV programmable

Built-in excitation voltage: 0.5 V / 1 V / 2.5 V / 5 V / 10 V selectable by software

Support for bridges:

Full-Bridge

Half-Bridge

Quarter-Bridge (with built-in compensation resistance available)

Input impedance: >1 GΩ

Isolation: 250 Vrms isolation between channels and ground

Anti-aliasing filtering: Built-in programmable low-pass filter

Key features

Suitable for: strain gauges, weighing sensors, force sensors, torque sensors, pressure bridge sensors

Support for remote four-wire induction compensation to eliminate lead resistance errors

Configurable internal matching resistance for 1/4 bridge (120 Ω / 350 Ω)

Wide temperature operation: -40 ℃ ~ +70 ℃

Industrial anti-vibration, fanless reinforced design

Interface versions

NI-9237 (screw terminal version)

NI-9237 BNC version suitable for quick wiring in the laboratory

Software compatibility

Driver: NI-DAQmx

Support: LabVIEW, Real-Time, Python, C/C++, Visual Studio

Can directly perform strain calculation, offset reset, range calibration, fatigue stress acquisition