NI SCXI-1326

NI SCXI-1326

Product Overview
The NI SCXI-1326 is a high-voltage screw-terminal block designed for use with NI SCXI relay and switching modules. It provides secure field wiring connections for applications that involve higher voltage signals, industrial monitoring and automated switching. The terminal block supports isolated channel connections and is suitable for environments where reliable high-voltage interfacing and noise immunity are required. It mounts into SCXI-1000 series chassis and connects directly to compatible SCXI modules.

Request Quote
Category:

Description

NI SCXI-1326

Technical Specifications

  • Brand: National Instruments
  • Model: SCXI-1326
  • Product type: High-voltage screw-terminal block
  • Terminal count: 36 to 48 screw terminals depending on configuration
  • Wire capacity: Up to 2.5 mm², typically 26 AWG to 16 AWG
  • Maximum voltage: 250 V AC/DC CAT II in common specifications; some references list up to 300 V AC/DC
  • Isolation rating: Up to 600 V continuous in some specifications; channel-to-channel and channel-to-ground isolation commonly rated at 250 V RMS
  • Maximum load current per channel: 2 A
  • Operating temperature: 0 °C to 50 °C
  • Storage temperature: −20 °C to 70 °C
  • Humidity: 5% to 90% RH, non-condensing
  • Compatible chassis: NI SCXI-1000 series chassis
  • Compatible modules: SCXI-1160, SCXI-1161, SCXI-1162HV and related high-voltage SCXI modules

Functional Features

  • Provides high-voltage field wiring connections for SCXI modules.
  • Supports isolated channel-to-channel and channel-to-ground connections.
  • Uses screw terminals for secure and vibration-resistant wiring.
  • Reduces wiring errors through clear terminal labeling.
  • Supports relay-based switching of industrial signals.
  • Provides shielded construction to improve noise immunity.
  • Integrates directly with SCXI relay modules.
  • Suitable for power monitoring, industrial switching and automated test systems.

Application Scenarios

  • Industrial relay switching systems.
  • High-voltage signal monitoring.
  • Power distribution test setups.
  • Automated test equipment requiring isolated switching.
  • Factory automation signal interfacing.
  • Energy and utility monitoring systems.
  • Process control relay interfaces.
  • Laboratory high-voltage measurement racks.

Performance Parameters

  • High-voltage screw-terminal interface.
  • Channel isolation for improved safety and noise rejection.
  • 2 A maximum load current per channel.
  • 250 V AC/DC CAT II voltage rating in common specifications.
  • Up to 600 V continuous isolation in some product references.
  • 36 to 48 screw terminals depending on version.
  • 26 AWG to 16 AWG wire compatibility.
  • Exact terminal count, isolation rating, voltage category and compatible module list should be confirmed from the official NI SCXI-1326 documentation and nameplate.

Material Composition

  • High-voltage rated screw terminals.
  • Insulated terminal block housing.
  • Shielded backplane interface.
  • Conductive contacts rated for industrial switching.
  • Mounting hardware for SCXI chassis integration.
  • Labeling for channel identification.
  • Protective insulating materials for high-voltage safety.

Structural Features

  • Screw-terminal block layout for field wiring.
  • Direct connection to compatible SCXI relay modules.
  • Shielded construction for EMI and RFI reduction.
  • Clearly marked terminal positions.
  • Robust mechanical design for industrial environments.
  • Compact SCXI-compatible form factor.
  • Isolated terminal arrangement for high-voltage safety.

Working Principle
The SCXI-1326 provides a physical wiring interface between field circuits and SCXI relay modules. Field wires are secured to screw terminals, and the terminal block routes these signals to the internal relay contacts of the connected SCXI module. Isolation between channels helps prevent ground loops and reduces interference. When the relay module switches a channel, the corresponding field circuit is opened or closed according to the control system command. The shielded design helps maintain signal integrity in electrically noisy environments.

Installation Requirements

  • Install only in a compatible NI SCXI-1000 series chassis.
  • Power down the chassis before installing or removing the terminal block.
  • Verify compatibility with the connected SCXI relay module.
  • Use wire sizes within the 26 AWG to 16 AWG range.
  • Tighten screw terminals securely to prevent loose connections.
  • Maintain proper clearance for high-voltage wiring.
  • Follow local electrical safety regulations for voltages above 50 V.
  • Label field wires clearly to avoid misconnection.

Precautions for Use

  • Do not exceed the rated voltage, current or isolation limits.
  • Treat all high-voltage circuits as hazardous until verified de-energized.
  • Do not use the terminal block with incompatible SCXI modules.
  • Avoid installing in wet, corrosive or excessively dusty environments.
  • Inspect terminals for damage before applying power.
  • Keep high-voltage wiring separated from low-voltage signal wiring.
  • Follow lockout/tagout procedures during maintenance.
  • Refer to the official NI SCXI-1326 documentation for exact ratings, wiring diagrams and safety instructions.

Related products