National Instruments SCXI‑1104C 32‑Channel Medium‑Voltage Analog Input Module

The National Instruments SCXI‑1104C is a 32‑channel differential medium‑voltage analog input signal conditioning module for the NI SCXI data acquisition platform. It integrates attenuator, programmable amplifier and 10 kHz low‑pass filter for conditioning medium‑voltage analog signals from field transducers. It multiplexes multi‑channel input signals to DAQ hardware for high‑channel‑count measurement tasks in industrial test and measurement systems.

This SCXI‑form factor module supports up to ±60 V input voltage with built‑in over‑voltage protection. It connects to SCXI chassis backplane for power and data communication. It works together with NI DAQ hardware and LabVIEW software to complete signal acquisition, configuration and data processing. As legacy aftermarket spare parts, it is widely used for maintenance and retrofit of industrial test benches, power monitoring and mechanical vibration measurement systems.

Main Specifications

• Brand: National Instruments(NI); Model: SCXI‑1104C; Type: Medium‑Voltage Analog Input Module
• Compatible System: NI SCXI chassis, DAQ acquisition hardware, LabVIEW / NI‑DAQmx driver
• Core Functions: 32‑channel differential analog input, signal attenuation, programmable gain, 10 kHz low‑pass filtering, over‑voltage protection, multiplexed signal output, backplane data transmission
• Port Resource: SCXI backplane connector, front‑signal terminal interface
• Supported Feature: ±60 V maximum input range, high‑input impedance, noise suppression, software‑configurable parameters
• Hardware Feature: Standard SCXI plug‑in module, powered by chassis backplane, industrial‑grade design
• Supply Status: Aftermarket spare part for legacy test‑measurement‑system maintenance and component replacement

Core Functions

• Accept 32‑channel differential medium‑voltage analog signals from field sensors and transducers.
• Built‑in divide‑by‑10 attenuator circuit adapts high‑voltage input to match DAQ device measurement range.
• Programmable gain and 10 kHz low‑pass filter improve signal quality and suppress high‑frequency noise.
• Multiplex multi‑channel input signals and transmit conditioned signals to external DAQ acquisition device.
• Provide over‑voltage protection to prevent damage to module and downstream DAQ hardware.
• Complete parameter configuration and data reading through NI‑DAQmx driver and LabVIEW software environment.

Application Scenarios

• Multi‑channel voltage signal acquisition for industrial test benches, power equipment monitoring and mechanical‑equipment testing.
• Fault analog‑input‑module replacement and routine maintenance of existing NI SCXI measurement systems.
• High‑channel‑count signal‑conditioning hardware upgrading and technical transformation for legacy test‑measurement platforms.
• Emergency swap for module failure of continuously‑running industrial test and data‑acquisition equipment.
• Spare‑parts stocking for test‑lab and automation‑maintenance teams supporting NI SCXI series products.
• Aftermarket spare supply for measurement‑system overhaul and technical‑service projects of industrial facilities.

FAQ

• Q: Can SCXI‑1104C work independently without SCXI chassis and DAQ hardware?
  A: It must be installed in SCXI chassis and cooperate with DAQ device and driver software, cannot operate as standalone hardware.
• Q: What are typical module failure symptoms?
  A: Channel no‑reading, signal distortion, abnormal data jump, multiplexing error, no response in software acquisition.

• Q: How to complete commissioning and diagnosis?
  A: Inspect chassis power supply and signal wiring; configure parameters in NI‑DAQmx, verify input reading by applying known‑voltage signal.