NI SCXI-1300

Description

Product Description

The NI SCXI-1300 is a versatile signal conditioning terminal block designed for use with National Instruments’ SCXI (Signal Conditioning eXtensions for Instrumentation) modular platform. This module does not perform active signal conditioning itself but serves as a high-quality, configurable interface between field wiring and active SCXI signal conditioning modules (such as the SCXI-112x series). The NI SCXI-1300 provides screw terminals for reliable connection of input and output signals, and it routes these signals to the appropriate pins on the SCXI backplane. For comprehensive technical specifications, pinout diagrams, and configuration guides, the essential resource is the official National Instruments product page for the NI SCXI-1300. Implementing a system with the SCXI-1300 terminal block ensures a clean, organized, and professional wiring interface, which is crucial for maintaining signal integrity in data acquisition and control systems. Its flexible design supports a wide range of signal types when paired with the appropriate conditioning module.

Product Parameters

• Manufacturer / Brand: National Instruments (NI).
• Series: SCXI (Signal Conditioning Platform).
• Model: SCXI-1300 – General-Purpose Screw Terminal Block.
• Function: Passive Terminal Block / Interconnect Module.
• Compatibility: Designed to connect to SCXI-1120, SCXI-1121, SCXI-1122, SCXI-1124, and other compatible SCXI modules installed in an SCXI chassis.
• Connections: Provides 96 screw terminals for field wiring, organized into three 32-terminal banks.
• Terminal Type: Removable screw terminal blocks for easy wiring and maintenance.
• Wiring Support: Supports connection of various signal types including analog inputs/outputs, digital I/O, and timing signals, depending on the connected active SCXI module.
• Shielding: Includes connections for signal ground and shield connections to manage noise.
• Form Factor: Plugs directly into the front connector of a compatible SCXI module, extending the module’s I/O to screw terminals.
• Passive Device: Contains no active electronics; it is a wiring interface only.

Advantages and Features

• Professional Wiring Interface: Converts the high-density D-sub or ribbon cable connector of an SCXI module into a robust, industry-standard screw terminal interface, simplifying field wiring and strain relief.
• High-Density Channel Access: Provides convenient access to all signals from a multi-channel SCXI module (like a 32-channel multiplexer) in a single, organized block.
• Improved Signal Integrity: By offering dedicated points for shield and ground connections, the NI SCXI-1300 helps implement proper grounding schemes to minimize electrical noise in sensitive measurements.
• Modular and Reusable: Can be easily unplugged and reused with different SCXI modules or in different systems, protecting the investment in the active electronics.
• Simplified Maintenance: Individual terminal blocks can be removed for wiring or rework without disconnecting the entire module from the chassis.

Application Cases in Industry

• Automotive Test Bench: The NI SCXI-1300 terminal block is used to connect dozens of thermocouples from an engine under test to an SCXI-1121 isolation module for temperature monitoring.
• Aerospace Structural Testing: Provides the wiring interface to connect hundreds of strain gauge bridge completion circuits to SCXI-1122 and SCXI-1520 modules for stress and fatigue testing.
• Industrial Machine Monitoring: Used to wire accelerometers and proximity probes from machinery to SCXI modules for vibration analysis and predictive maintenance data acquisition.
• Research Laboratory: Organizes connections for multiple analog voltage and current signals from various laboratory instruments into a centralized SCXI data acquisition system.
• Power Electronics Development: Serves as a clean interface for connecting high-voltage differential signals and gate drive signals to isolation and conditioning modules during prototype testing.

Comparison with Competing Products

Competing products are terminal block accessories from other data acquisition vendors, such as Keysight (34901A 20-Channel Actuator) or terminal blocks from ADLINK or Dewesoft for their respective systems. The NI SCXI-1300 differentiates itself through its specific, optimized design for the NI SCXI ecosystem. Compared to a generic screw terminal board, it is mechanically and electrically keyed to mate perfectly with NI hardware, ensuring reliable connections and correct pin mapping. Its primary advantage is seamless integration with the broad range of NI SCXI active modules and software (LabVIEW, DAQmx), providing a cohesive and supported solution from sensor to software.

Selection Suggestions and Precautions

• Selection Suggestions:
  1. Select the NI SCXI-1300 when using compatible SCXI signal conditioning modules (like the SCXI-1120/1121/1122/1124) and you require a durable screw terminal interface for field wiring.
  2. Verify the compatibility of the SCXI-1300 with the specific SCXI module model you are using by checking the module’s datasheet and connector pinout.
  3. Plan your wiring layout by labeling terminals according to the signal names or channels from your active SCXI module to avoid wiring errors.
• Precautions:
  1. Passive Device: Remember that the SCXI-1300 provides no signal conditioning, amplification, or isolation. All conditioning is performed by the active SCXI module it is attached to.
  2. Proper Wire Termination: Use the correct wire gauge and ensure screw terminals are tightened to the specified torque. Loose connections are a common source of intermittent noise and measurement errors.
  3. Shield Grounding Strategy: Decide on a single-point grounding scheme for cable shields. Connect shields to the dedicated terminals on the SCXI-1300 as per your system design to minimize ground loops.
  4. Signal Separation: When wiring, try to separate high-voltage, high-current, or digital lines from sensitive low-level analog signals (like thermocouples or strain gauges) across different terminal blocks or banks to reduce crosstalk.
  5. Handling and Compatibility: Handle the terminal block with care. Do not force it onto the SCXI module connector. Ensure you have the correct pinout/cabling document for your specific SCXI module/SCXI-1300 combination. Source from authorized NI distributors or reputable suppliers to ensure you receive a genuine, high-quality part.

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