NI SCXI-1140 8-Channel Amplifier Module

NI SCXI-1140 is an 8-channel simultaneous sampling differential amplifier module for NI SCXI signal conditioning platform. It adopts track-and-hold technology to achieve synchronous signal capture on all channels, maintaining ultra-low phase skew between different measurement channels.

This module integrates high-impedance instrumentation amplifiers with switch-selectable gain settings. It supports parallel and multiplexed operation modes, paired with SCXI chassis and DAQ hardware for high-precision dynamic signal acquisition in industrial measurement systems.

Main Specifications

1. Brand: National Instruments (NI); Model: SCXI-1140; Series: SCXI; Type: Simultaneous Sampling Differential Amplifier Module
2. Channels: 8 differential analog input channels; Input voltage range: ±10V; High input impedance design
3. Sampling: Track-and-hold simultaneous sampling, minimal inter-channel time skew
4. Gain: Switch-selectable gain for weak signal amplification
5. Mounting: SCXI chassis installation; Operating Temp:0℃ ~ +55℃
6. Accessory: Matched terminal block SCXI-1301 for field wiring
7. Supply Status: Discontinued DAQ module, available as industrial spare parts for existing system maintenance

Core Functions

1. Simultaneous sampling and hold function, keeps consistent sampling time across all 8 channels.
2. Programmable gain adjustment to amplify low-level sensor signals before data acquisition.
3. Differential input design effectively suppresses common-mode interference noise on site.
4. Supports parallel and multiplexed working modes to match different DAQ system architectures.
5. High input impedance avoids loading effects on sensors and measured signals.
6. Standard SCXI form factor, easy replacement and maintenance in existing SCXI measurement cabinets.

Application Scenarios

1. Multi-channel dynamic vibration and acoustic testing for machinery condition monitoring.
2. Automotive and aerospace structural dynamic measurement and impact testing.
3. High-precision synchronized data acquisition for industrial test bench systems.
4. Replacement of faulty modules for old NI SCXI measurement systems.
5. Spare parts inventory for labs and factories maintaining legacy DAQ platforms.
6. Retrofit and upgrade of existing multi-channel signal conditioning test systems.

FAQ

1. Q: What is NI SCXI-1140 used for?
   A: It is an 8-channel simultaneous sampling differential amplifier module, used for multi-channel dynamic signal conditioning and synchronous measurement.
2. Q: What terminal block works with SCXI-1140?
   A: SCXI-1301 terminal block is the recommended matching accessory for sensor wiring connection.
3. Q: Is NI SCXI-1140 still in production?
   A: NI has discontinued this model, users can select alternative PXIe DAQ modules for new projects.