Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
TB-2631B
TB-2631B, 160-Pin Female D-Sub, Terminal Block
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
✔ Free Domestic Ground Shipping
✔ NIST Calibration Available
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments TB-2631B Terminal Block
The NI TB-2631B (Part Number: 781688-01) is a Terminal Block designed for the PXI-2530B Switch Module, a reed relay Multiplexer that offers a broad range of topologies. This simple device installs in front of the host switch while maintaining signal flow through screw terminals. This model features dedicated screw terminals for trigger inputs and outputs. With this Terminal Block, users can achieve two configurations: 4 x 32 (one-wire) matrix and 4 x 16 (two-wire) matrix.
The TB-2631B is an ideal solution for applications where frequent switching between different configurations is necessary. This Terminal Block is not compatible with the PXI-2530 Switch Module. The rear 160-position connector of the NI TB-2631B plugs into the front connector of the PXI-2530B Switch Module. You can access the screw terminals of this accessory by removing the top cover. The NI TB-2631B can work with almost every National Instruments PXI Chassis.
This Terminal Block has various features to protect the integrity of sensitive signals. A strain-relief bar with screws is provided to prevent undesired cable movements. Moreover, 2 chassis screws are also used to ensure tightness between the accessory, the host module, and the chassis. The 160-position connector incorporated in this accessory is designed to withstand voltage up to 60 VDC and can safely handle up to 0.4 amperes of current. For TRIGIN and TRIGOUT signals, the NI TB-2631B comes with separate screw terminals that are designed to work with up to +5V signals.
TB-2631B Obsolete Status has been announced by National Instruments, but the Terminal Block will still be available for purchase and repairs by Apex Waves.
| Model | TB-2631B |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 781688-01 |
| Type | Terminal Block |
| Compatible Module | PXI-2530B Switch Module |
| Shielded | Yes |
| Configurations | 4 × 32, 1-wire matrix, 4 × 16, 2-wire matrix |
| D-Sub Connector | 160-Pin Female |
| Screw Terminal Connector | 48-Pin Female |
| TB-2631B Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for TB-2631B:
Delivery:
Eligible returns may be accepted within 30 days at Apex Waves’ discretion. A 25% restocking fee applies; non-refundable and built-to-order products are excluded.
Payment:
Receive Price & Availability Today!
Ask About Our Tiered Calibration Levels
Option & Modules:
Confirm Your Requirements or Versions
Cost & Lead Time Available Upon Request for Service
Repair Evaluation: $150
Common Typos:
Why Buy From Apex Waves:
