NI TB-2643 Front-Mount 4x64 Matrix Terminal Block for NI 2532 Switches

  • NI Recommends the NI 2532B Family
  • Designed to easily facilitate column expansion with dual row connections
  • Optional configuration includes 100 Ω protection resistors on the rows and columns
  • Signal connections are made with ribbon cable headers inside the housing
  • Configures an NI 2532 as a 4x64 two-wire matrix

Not Recommended for new designs. Consider using the NI 2532B Family

The NI TB-2643 is a front-mounting terminal block for NI 2532 high-density matrix switches. In addition to defining an NI 2532 as a 4x64 matrix, the TB-2643 exposes signal connections through ribbon cable headers inside the housing. For high-power applications, you can include 100 Ω protection resistors in the configuration. To connect to the rows of additional NI 2532 switches, two sets of row connections are available in the terminal block.

Service Programs for Hardware

At NI, we produce high-performance hardware and are committed to helping you maintain that performance for years to come. Our three- or five-year service programs for hardware and systems provide the coverage you need while ensuring lowest total cost of ownership over the life of your system:

  • Get up and running faster with system assembly and configuration services
  • Operate on a fixed budget with prepaid repair and calibration services
  • Maintain peak performance with a discounted calibration plan
  • Simply call us to schedule your service—no budget approval needed

To learn more about service programs for hardware and systems, see

Technical Support

With the knowledge, experience, and responsiveness of NI applications engineers in more than 30 languages and 40 countries, we have the technical support resources to ensure your success. Through our standard NI technical support program, we can help you:

  • Consult on how to use NI products
  • Overcome development challenges
  • Quickly resolve issues pre- or post-deployment

To access NI technical support services for your hardware, visit

Training and Certification

With extensive training options for new and experienced users, we can help you reduce development time and costs through faster learning and increased productivity with your NI hardware and systems. Gain the skills you need to design and develop high-quality applications:

  • Learn recommended techniques to reduce development time and improve application performance and scalability
  • Leverage more than 40 training courses taught by NI and industry experts
  • Attend training in a variety of formats, including online, virtual, and classroom settings

To find training courses for your hardware, visit

Consulting and Integration

NI and the extensive network of NI Alliance Partners provide a wide range of professional services so that together, we can assist you with the design, development, and deployment of even the most complex systems. Take advantage of the team’s in-depth knowledge of NI products and applications with the following services:

  • Prototyping and feasibility analysis
  • Startup, consulting, and development assistance
  • System integration
  • Migration and upgrade assistance

For more information on NI professional services and the Alliance Partner Network, see