The NI TB-2640 configures the PXI-2532 as a 4×128 1-wire matrix with ribbon cable signal connections.
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Key product information and technical features.
The TB-2640 provides matrix routing and internal row and column headers for the PXI-2532.
For individual-wire termination, NI documents the SCB-264X screw-terminal accessory connected through ribbon cables. Its manual includes a TB-2640-specific wiring table.
Verified product specifications.
| Matrix topology | 4×128, 1-wire |
|---|---|
| Maximum channel-to-channel switching voltage with PXI-2532 | 100 V |
| Maximum channel-to-ground switching voltage with PXI-2532 | 100, CAT I V |
| Maximum current per channel | 0.5 A |
| Row and column protection resistance, when used | 100 Ω |
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Manufacturer
Matrix switch module
Topology and signal interface
SCB-264X, connected through ribbon cables
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Product-specific answers based on available technical information.
NI lists 779056-01 as the standard TB-2640 and 779056-02 as the version with protection resistance. The catalog record does not identify its specific variant.
NI documents the SCB-264X accessory for screw-terminal wiring through ribbon cables connected to the TB-2640.
No. NI documents TB-2640B for the NI 2532B and explicitly states that TB-2640B is not compatible with the NI PXI/PXIe-2532. Keep the terminal-block and switch-module generations matched.