National Instrument SCXI-1125 Analog input signal conditioning module
Specific Parameters
Brand National Instrument (NI)
Product Series SCXI Series Analog Input Signal Conditioning Modules
Product Type High-Precision Thermocouple/Voltage Signal Conditioning Module
Model SCXI-1125
Number of Input Channels 16 differential analog input channels
Supported Signal Types Thermocouple (J, K, T, E, R, S, B, N type), Voltage signals (0-10V, ±5V, ±1V, etc.)
Gain Range 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000 (programmable)
Resolution When used with 16-bit DAQ card, equivalent resolution ≥17 bits
Input Impedance Voltage mode: ≥10GΩ; Thermocouple mode: ≥100MΩ
Filter Characteristics Low-pass filter, cutoff frequency configurable, default 10Hz
Cold Junction Compensation Built-in high-precision cold junction compensation, compensation accuracy ±0.1℃ (0℃-50℃)
Isolation Voltage 2500V AC isolation between channels and between channel and backplane (1 minute)
Operating Voltage Powered by SCXI chassis (±15V DC, +5V DC)
Operating Temperature Range 0℃ – 55℃
Storage Temperature Range -20℃ – 70℃
Relative Humidity 10% – 90% Non-condensing
Dimensions 132mm×160mm×37mm (L×W×H)
Weight Approximately 350g
Certification CE, UL, CSA, FCC Part 15 Class A
Compatible Devices Compatible with SCXI-1000/1001/1002/1003 chassis, compatible with multiple NI DAQ cards such as PCI-6071E, PCI-6221
Diagnostic Functions Power failure diagnosis, Channel connection status diagnosis, Cold junction compensation failure diagnosis
Product Performance
16 differential input channels, supporting conditioning of various types of thermocouple and voltage signals, can simultaneously adapt to multiple low-level signal acquisition needs with high integration
Equipped with programmable gain adjustment function, gain range covering 1-1000, can accurately match weak signals of different amplitudes, ensuring the amplification accuracy of small signals
Built-in configurable low-pass filter, which can effectively filter out high-frequency interference signals, improve the stability of input signals, and ensure the accuracy of subsequent data acquisition
High-voltage isolation design between channels and between channels and backplane, which can effectively suppress common-mode interference and electromagnetic interference in industrial sites, protecting the safety of backend DAQ equipment
Built-in high-precision cold junction compensation module, realizing precise compensation for thermocouple signals without additional external compensation circuits, simplifying the system construction process
Fully compatible with SCXI bus specification, can be seamlessly integrated with multiple NI SCXI chassis and DAQ cards, supports NI-DAQmx driver software, and is compatible with LabVIEW development environment, with extremely strong system compatibility
Equipped with complete fault diagnosis functions, can real-time monitor the module operation status, and fault information is synchronized to the acquisition system, facilitating operation and maintenance personnel to quickly troubleshoot problems
Industrial-grade stable design, operates stably for a long time in the operating temperature range of 0℃-55℃, and can be adapted to various environments such as laboratories and industrial test sites
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