Description
Key Technical Specifications
- Model Number: SCXI-1104C
- Manufacturer: National Instruments (NI)
- Series: SCXI (Signal Conditioning eXtensions for Instrumentation)
- Module Type: 32-Channel Medium-Voltage Input Module
- Input Configuration: 32 Differential Analog Input Channels
- Filter Cutoff Frequency: 10 kHz (Fixed)
- Gain: Fixed 0.1 (Divide-by-10 Attenuator)
- Max Input Voltage: Up to 60 V
- Software Requirement: NI-DAQ version 6.7 or later
- Output: Multiplexed to single module output
Functional Role & Application Analysis
The NI SCXI-1104C is a 32-channel signal conditioning module designed specifically for scaling down and isolating medium-voltage signals before they reach a DAQ device. It solves the problem of safely measuring higher voltages (up to 60 V) without damaging sensitive data acquisition hardware. By applying a fixed divide-by-10 attenuation stage before the amplifier, the SCXI-1104C ensures precise signal routing. Its defining feature is the 10 kHz fixed cutoff frequency filter, which distinguishes it from the standard SCXI-1104 (which has a 2 Hz filter). This makes the SCXI-1104C the correct choice for capturing time-varying medium-voltage signals rather than just slow-varying DC.
Typical use cases include:
- Time-Varying Signal Acquisition: Capturing dynamic, time-varying medium-voltage signals in industrial testing environments where a 10 kHz bandwidth is required.
- High-Voltage DAQ Protection: Scaling down signals up to 60 V to safe levels for standard DAQ cards, utilizing the fixed 0.1 gain stage.
- Noisy Environment Monitoring: Measuring dynamic signals in electrically noisy industrial plants, though users must be wary of noise if their signal is actually low-frequency.
- Multiplexed Scanning: Routing up to 32 differential channels to a single DAQ device input via the SCXIbus or direct connection.
Our Quality Standard & Testing Process
We understand that the cost of an unreliable signal conditioning module is far greater than its purchase price. A failed SCXI-1104C means corrupted test data or damaged DAQ equipment. We have established a rigorous, multi-stage testing process to ensure every product we ship is 100% functional and ready for installation.
- Visual & Component Inspection: All modules undergo professional cleaning and visual inspection to ensure no PCB corrosion, damaged DIN connectors, or compromised SCXIbus pins.
- Live System Test: The module is installed in a live NI SCXI chassis and run for 24 hours to verify continuous backplane communication and stable power draw.
- Full-Function Diagnostics: We apply precision voltages across all 32 channels to verify the exact 0.1 gain attenuation, validate the 10 kHz filter response, and confirm multiplexer switching accuracy.
- Warranty Backing: Only modules that pass all diagnostic tests are approved for shipment and backed by our full 12-month warranty.
NI SCXI-1104C
Compatibility & Migration Paths
To ensure this SCXI-1104C is 100% compatible with your system, you must check these key compatibility points. Failure to verify this is a common project risk that leads to costly delays and returns.
- Driver Software Version: You must confirm your system is running NI-DAQ version 6.7 or later. The standard SCXI-1104 only requires 6.5.1, but the ‘C’ variant will not function correctly on older drivers.
- Filter Frequency Mismatch: Do not blindly swap this with a standard SCXI-1104. The 1104 has a 2 Hz cutoff; using it in place of the will filter out your dynamic signal, while using the 1104C for low-frequency DC may introduce excessive noise.
- Low-Voltage Limitation: This module has a fixed 0.1 gain and is NOT suited for low-voltage DC or mV-level thermocouple measurements. If you need programmable gain for low voltages, you must select the SCXI-1102B instead.
- Get Expert Help: Unsure about your system? Contact our technical team today for a free compatibility check. We verify your exact configuration before shipping.
