PDF1. PXI/PXIe-2532 Terminal Blocks
Several terminal blocks are available for the PXI/PXIe-2532:
- TB-2640: 4x128 1 -wire
- TB-2641: 8x64 1-wire
- TB-2642: 16x32 1-wire
- TB-2643: 4x64 2-wire, Dual 4x64 1-wire
- TB-2644: 8x32 2-wire, Dual 8x32 1-wire
- TB-2645: Dual 16x16 1-wire
Each terminal block can be ordered with or without column protection. To provide column protection the 0 ohm resistor in series with each column has been replaced by a 100 ohm resistor on the column connection board.
Column protection resistor
The TB-2640 and TB-2643 have 2 column connection boards.
PXI/PXIe-2532 terminal block with two column connection boards
The TB-2641, TB-2642, TB-2644, and TB-2645 have one column connection board.
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  PXI/PXIe-2532 with one column connection board |
2. Expansion Options
To expand your matrix size use the 16-Pin Row Expansion Cable (part # 779325-01). This cable will allow you to connect rows of two adjacent PXI/PXIe-2532 terminal blocks to double the number of column. Since each terminal block offers two row connection header, multiple terminal blocks can be connected to create larger matrices.
PXI/PXIe-2532 terminal blocks provide ribbon cable headers for column and row connection. There are two column headers per column connection board.
To connect signals to a column header you will need a 34 conductors 30 AWG, .05 in pitch ribbon cable connector and a 34 conductor, 30 AWG, .025 in. pitch shielded/unshielded ribbon cable.
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 Column ribbon cable header |
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 Row ribbon cable header |
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Connectors and ribbon cable are available from different vendors.
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Description
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Manufacturer
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Part number
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16 Conductor, 30 AWG, .05 in. pitch
unshielded ribbon cable assembly |
FFSD-08-01-N
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34 Conductor, 30 AWG, .05 in. pitch
unshielded ribbon cable assembly |
FFSD-17-01-N
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PXI/PXIe-2532 terminal block accessories
To connect signals to any PXI/PXIe-2532 terminal blocks simply connect your cable assembly to the column and row headers:
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4. Signal Connection with SCB-264x
The NI SCB-264X is a shielded connector block to interface individual signal wires to the rows and columns of the NI PXI/PXIe-2532 matrix. The NI SCB-264X has five ribbon cable connectors for connecting to the NI TB-2640/2641/2642/2643/2644 (NI TB-264X) connector blocks and screw terminals for connecting signals. The NI SCB-264X supports all NI PXI/PXIe-2532 topologies that are configured with the NI TB-264X. The NI SCB-264X can be used alone, or it can be rack-mounted using the included DIN rail-mounting kit.
Note: References to the NI TB-264X in this document do not include the NI TB-2645. The NI TB-2645 is not compatible with the NI SCB-264X.
To connect the SCX-264X to any PXI/PXIe-2532 terminal blocks use the Row and Column Cable Kit (part# 779346-01).
This cable kit includes:
- 1 16-conductors ribbon cable with connectors on both ends to connect the rows
- 4 34-conductors ribbon cable with connectors on both ends to connect the columns
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Virginal Panel has been an important player in mass interconnect solutions for over 40 years with a high degree of reliability. They can offer a wide range of options for the PXI/PXIe-2532.
MAC Panel also provides configurable mass interconnect solutions including the SCOUT which offers PCB or short wire interconnections for your PXI/PXIe test system. There are several options available for the PXI/PXIe-2532 that accommodate it's various topologies.
6. Related Links
KnowledgeBase 4QQH8D9G: How to Connect the TB-264x’s Columns to the SCB-264x
KnowledgeBase 4R3C2L9G: What Are the Optional Isolation Resistors of the TB-264x Series?
KnowledgeBase 4ZMH7M9G: Why Do I See Signal Attenuation With My PXI/PXIe-2532 Switch?
