Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
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TB-2605, Screw Terminal, Isothermal, Terminal Block
Rated 4.9/5 | 18 ratings
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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✔ 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-2605 Terminal Block
The TB-2605 is a front-mounting, screw terminal, Terminal Block with multiplexing properties. The TB-2605 is launched by National Instruments. The NI TB-2605 is a member of the terminal block series by NI. The TB-2605 correlates to the part number 777878-01. The NI TB-2605 is compatible with the NI 2501 and NI 2503, and connects to the front panel I/O connector of each PXI switch card. The TB-2605 Terminal Block includes an analog bus plug for simple multiplexer expansion.
This Isothermal Terminal Block comprises a printed circuit board with screw terminals. The TB-2605 terminal block has screw terminals. The NI TB-2605 can function with ease with thermocouples, voltage signals, thermistors, and resistance temperature detectors (RTDs). The TB-2605 is configured with isothermal features to reduce the temperature gradients across the screw terminals. This Terminal Block additionally has an extremely precise cold-junction temperature sensor, which can be used when measuring with thermocouples.
To use the terminal block, the following items are needed: a NI 2501 or 2503 switch card, a NI 2501/2503 User Manual, the TB-2605 isothermal terminal block, Wire cutters, a 0. 10 in. slotted screwdriver, Wire insulation stripper, Analog bus connectors, a No. 1 Phillips screwdriver.
The NI TB-2605 is constructed with an enclosure to preserve an isothermal atmosphere for the cold-junction sensor and the screw terminals. The screw terminals on this Terminal Block can be utilized to link to every channel, excluding the cold-junction sensor. The TB-2605 is built with two extra connectors on the front panel to provide connections for the analog bus. You can utilize the low-voltage AB plug to link the analog bus of nearby switch cards. The device has a cold-junction sensor accuracy of 0.5° from 15 to 35 °C, 0.9° from 0° to 15° C, and 35 to 55 °C. Additionally, it has a cold-junction sensor readability and output of 0.2° from 15 to 35 °C and 198.54 mV to 19.58 mV from 0 to 55 °C respectively. The NI device measures 3.3 x 4.2 x 0.80 in. (8.4 x 10.7 x 2.0 cm) in physical dimensions.
TB-2605 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-2605 |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 777878-01 |
| Type | Terminal Block |
| Connectors | Screw Terminals |
| Compatible Switch 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 |
| Dimensions | 3.3 by 4.2 by 0.80 in. |
| Warranty | Three Year Warranty |
| TB-2605 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for TB-2605:
National Instruments TB-2605 Frequently Asked Questions
Question: What is the output of the TB-2605 cold-junction sensor?
Answer: The cold junction sensor output is 198.54 mV to 19.58 mV, from 0 to 55 °C.
Question: What is the repeatability of the TB-2605 cold-junction sensor?
Answer: The repeatability of the TB-2605 cold-junction sensor is 0.2° from 15 to 35 °C
Question: What is the maximum voltage of the TB-2605?
Answer: The maximum voltage for each input of the TB-2605 stay within 30 Vrms or 60 VDC of ground.
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