Product Description

The NI SCXI-1125 is a high-precision eight-channel isolated analog signal conditioning module designed for NI SCXI industrial data acquisition systems. It serves as a critical signal processing interface, amplifying, filtering and isolating weak analog sensor signals to convert unstable field signals into standard, high-quality data for accurate industrial measurement and analysis.

Featuring fully jumperless software configuration and independent per-channel isolation, this module supports 12-level programmable gain and dual-mode low-pass filtering. It delivers ultra-low noise performance and up to 300 Vrms channel isolation, with onboard EEPROM for calibration data storage. With wide temperature adaptability and overvoltage protection, it ensures stable and high-accuracy signal conditioning for complex industrial test and measurement scenarios.

Main Specifications

1. Full Model: SCXI-1125; Product Type: 8-channel isolated programmable analog input conditioning module
2. Applicable System: NI SCXI chassis, industrial data acquisition and automated test measurement systems
3. Core Function: Analog signal isolation, amplification, filtering, conditioning and precision data collection
4. Channel Design: 8 fully independent isolated channels to eliminate crosstalk and interference coupling
5. Gain Adjustment: 12 software programmable gain levels ranging from 1 to 2000 for flexible signal matching
6. Filter Mode: Dual configurable low-pass filters with 4 Hz precise filtering and 10 kHz high-speed sampling
7. Input Range: Standard ±2.5 mV to ±5 V range, expandable to 300 Vrms with matching terminal blocks
8. Isolation Performance: 300 Vrms per-channel electrical isolation for high-voltage environment safety protection
9. Storage Function: Built-in EEPROM for non-volatile storage of gain and offset calibration parameters
10. Environmental Reliability: -40°C to +85°C wide temperature range, ultra-low noise and overvoltage protection design

Core Functions

1. Acts as high-precision analog signal conditioning core for NI SCXI data acquisition systems.
2. Independently processes eight-channel field weak analog signals with full electrical isolation.
3. Adjusts signal amplitude flexibly via multi-level programmable gain configuration.
4. Suppresses high-frequency noise through dual-mode low-pass filtering to purify signal quality.
5. Expands measurable voltage range to adapt to high-voltage industrial signal detection.
6. Stores calibration data permanently to maintain long-term measurement accuracy and consistency.
7. Provides reliable overvoltage and short-circuit protection for rear-end acquisition equipment.
8. Eliminates ground loop interference to solve common industrial signal distortion problems.
9. Supports jumperless software configuration to simplify system debugging and parameter adjustment.
10. Guarantees high-fidelity and high-stability data acquisition for industrial test systems.

Application Scenarios

1. Industrial high-precision sensor signal acquisition and conditioning test systems
2. Mechanical equipment vibration, pressure and strain parameter monitoring scenarios
3. Power system high-voltage signal isolation detection and data collection projects
4. Aerospace equipment performance testing and precision measurement platforms
5. Automotive component automated test and analog signal calibration systems
6. Process industry weak signal acquisition and anti-interference processing scenarios
7. Laboratory scientific research multi-channel high-precision data measurement systems
8. Old SCXI data acquisition system signal conditioning module replacement and upgrading
9. Harsh electromagnetic environment industrial signal stabilization processing projects
10. Industrial automated testing equipment multi-channel synchronous acquisition platforms