NI PXI/PXIe-2532/2532B 1-Wire Dual 8×32 Matrix Topology

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Edition Date: April 2015

Part Number: 375472H-01

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The NI TB-2644 terminal block creates a 1-wire dual 8×32 matrix topology with the NI PXI/PXIe-2532 (NI 2532). The NI TB-2644B terminal block creates a 1-wire dual 8×32 matrix topology with the NI PXI/PXIe-2532B (NI 2532B).The following figure represents the NI 2532/2532B in the 1-wire dual 8×32 matrix topology.

Making a Connection

For bank 0, both the scanning command, b0r1->b0c1;, and the immediate operation, niSwitch Connect Channels VI or the niSwitch_Connect function with parameters b0r1 and b0c1, result in the following connection:

signal connected to B0R1 is routed to B0C1

For bank 1, both the scanning command, b1r1->b1c1;, and the immediate operation, niSwitch Connect Channels VI or the niSwitch_Connect function with parameters b1r1 and b1c1, result in the following connection:

signal connected to B1R1 is routed to B1C1

Note  While you can, for example, connect B0R1 to B0C0, you cannot connect B0R1 directly to B1C1 in this topology.

Terminal Block Connections

The NI TB-2644 terminal block connects the banks of the NI 2532 to create the 1-wire dual 8×32 matrix topology. The NI TB-2644B terminal block connects the banks of the NI 2532B to create the 1-wire dual 8×32 matrix topology. The following figure illustrates how the native banks on the NI 2532/2532B connect using the NI TB-2644/2644B to create the 1-wire dual 8×32 matrix topology.

Bank Connection Diagram

The following tables list the pin assignments for the NI TB-2644/2644B column ribbon cable headers.

Column Pin Connections

The following table refers to the J3 connector on the NI TB-2644 column connection board and the J3 connector on the NI TB-2644B.

The following table refers to the J2 connector on the NI TB-2644 column connection board and the J2 connector on the NI TB-2644B.

Row Pin Connections

The NI TB-2644 and NI TB-2644B provide two ribbon cable headers for row connection. Use one cable header to connect to your application. Use the other cable header for column expansion.

The following table lists the pin assignments for row connection.

Row Protection Bypass Header

Each row signal is isolated from the reed relays through a 100 Ω resistor. To bypass this resistor, install a jumper on the appropriate pins of the header indicated in the table below. The following table lists the appropriate jumper position for bypassing the resistor on each row signal.

Pinout

The following figure identifies the pins for the NI 2532.

Caution  Do not connect to RESERVED pins. Keep low-voltage pins isolated from row and column channels when high voltage is present.

The following figure identifies the pins for the NI 2532B.

Caution  Do not connect to RESERVED pins.