Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
TBX-68S
TBX-68S, 68-pin, Isothermal, 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 TBX-68S Terminal Block
The TBX-68S is a 68-pin screw, Isothermal Terminal Block by National Instruments designed for use with the NI-2501 and NI-2503 PXI switch cards. The NI TBX-68S can also be identified by the part number 777716-01. This Terminal Block is designed to be DIN-Rail mounted and is also equipped with a cold-junction sensor. Screw terminal connections are available for every channel, except the cold-junction sensor. The TBX 68S is compatible with the shielded SH68-68S cable, which is available in 1 m, 2 m, or 5 m lengths. Another compatible cable option is the R6868 ribbon cable.
The National Instruments TBX-68S Terminal Block comprises a shielded board with screw terminals that link straight to the front panel I/O connector of the NI-2501 or NI-2503. The TBX-68S can be used in conjunction with thermocouples, thermistors, resistance temperature detectors (RTDs), and voltage signals. The isothermal feature of the Terminal Block helps reduce the temperature gradients across the screw terminals. The NI TBX-68S can be mounted on the majority of European standard DIN EN mounting rails, including the DIN EN 50 022 and DIN EN 50 03. The TBX-68S can additionally be mounted on the NI TBX Rack-Mount Assembly.
The NI TBX-68S does not offer strain relief for signal wires. However, you can add insulation and strain relief for your signal wires if it is required for your application. The NI TBX-68S is capable of auto-zeroing circuitry.
TBX-68S Obsolete Status has been announced by National Instruments, but the terminal block will still be available for purchase and repairs by Apex Waves.
| Model | TBX-68S |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 777716-01 |
| Type | Terminal Block |
| Screw Terminals | 68 |
| Compatible PXI Cards | NI-2501 and NI-2503 |
| Cold-junction Sensor Accuracy | 0.5° from 15° to 35° C, 0.9° from 0° to 15° C, and 35° to 55° C |
| Cold-junction Sensor Repeatability | 0.2° from 15° to 35° C |
| Dimensions | 5.0 by 4.4 by 3.0 in. |
| TBX-68S Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
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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.
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