Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
TB-2640
TB-2640, 4 x 128, 1-wire, 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-2640 Terminal Block
The TB-2640 is a front-mounting Terminal Block by National Instruments. The TB-2640 corresponds with the part numbers 779056-01 and 779056-02. The TB-2640 is designed to be used with the PXI-2532 Matrix Switch Module. Part number 779056-01 configures the PXI-2532 module as a 4 X 128 Matrix, while part number 779056-02 configures the PXI-2532 as a 4 X 128 Matrix with 100 Ohm protection resistors on the rows and columns. The 100 Ohm resistors are ideal for high-power applications because they protect the reed relays from capacitive loads.
The TB-2640 is created to facilitate column expansion with dual row connections with ease. Signal connections are accomplished via ribbon cable headers inside the housing. To link to the rows of other PXI-2532 Matrix Switch Modules, there are two sets of row connections accessible in the TB-2640.
The NI TB-2640 can operate with a maximum of 0.5 A current for each channel. The National Instruments TB-2640 has a DC path resistance of <1.5 Ω. This Terminal Block functions with the maximum channel-to-channel switching voltage of 100 V. The NI TB-2640 supports the channel-to-ground switching voltage of 100 V, CAT I. The NI Terminal Block is featured with a typical bandwidth of ≥10 MHz.
This Terminal Block requires four 2 mm jumpers, four 34 conductor, 28 AWG, .050 in. pitch ribbon cable assemblies, one 16 conductor, 28 AWG, .050 in. pitch ribbon cable assembly, and 1/8 in. flathead and #1 Philips screwdrivers.
TB-2640 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-2640 |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 779056-01 and 779056-02 |
| Type | Terminal Block |
| Compatible Switch Module | PXI-2532 |
| Maximum Switching Voltage | 100 V |
| Protection Resistors | 100 Ω |
| Maximum Current (per channel) | 0.5 A |
| Measurement Category | I |
| TB-2640 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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