NI PXI/PXIe-2532/2532B 1-Wire 8×64 Matrix Topology

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Edition Date: April 2015

Part Number: 375472H-01

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The NI TB-2641 terminal block creates a 1-wire 8×64 matrix topology with the NI PXI/PXIe-2532 (NI 2532). The NI TB-2641B terminal block creates a 1-wire 8×64 matrix topology with the NI PXI/PXIe-2532B (NI 2532B).The following figure represents the NI 2532/2532B in the 1-wire 8×64 matrix topology.

Making a Connection

Both the scanning command, r1->c1;, and the immediate operation, niSwitch Connect Channels VI or the niSwitch_Connect function with parameters r1 and c1, result in the following connection:

signal connected to R1 is routed to C1

Terminal Block Connections

The NI TB-2641 terminal block connects banks of the NI 2532 to create the 1-wire 8×64 matrix topology. The NI TB-2641B terminal block connects banks of the NI 2532B to create the 1-wire 8×64 matrix topology. The following figure illustrates how the native banks of the NI 2532/2532B connect using the NI TB-2641/2641B to create the 1-wire 8×64 matrix topology.

Bank Connection Diagram

The following tables list the pin assignments for the NI TB-2641/2641B column ribbon cable headers.

Column Pin Connections

The following table refers to the J3 connector on the NI TB-2641 column connection board and the J3 connector on the NI TB-2641B.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 C0 Pin 9 C8 Pin 17 C16 Pin 25 C24
Pin 2 C1 Pin 10 C9 Pin 18 C17 Pin 26 C25
Pin 3 C2 Pin 11 C10 Pin 19 C18 Pin 27 C26
Pin 4 C3 Pin 12 C11 Pin 20 C19 Pin 28 C27
Pin 5 C4 Pin 13 C12 Pin 21 C20 Pin 29 C28
Pin 6 C5 Pin 14 C13 Pin 22 C21 Pin 30 C29
Pin 7 C6 Pin 15 C14 Pin 23 C22 Pin 31 C30
Pin 8 C7 Pin 16 C15 Pin 24 C23 Pin 32 C31


The following table refers to the J2 connector on the NI TB-2641 column connection board and the J2 connector on the NI TB-2641B.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 C32 Pin 9 C40 Pin 17 C48 Pin 25 C56
Pin 2 C33 Pin 10 C41 Pin 18 C49 Pin 26 C57
Pin 3 C34 Pin 11 C42 Pin 19 C50 Pin 27 C58
Pin 4 C35 Pin 12 C43 Pin 20 C51 Pin 28 C59
Pin 5 C36 Pin 13 C44 Pin 21 C52 Pin 29 C60
Pin 6 C37 Pin 14 C45 Pin 22 C53 Pin 30 C61
Pin 7 C38 Pin 15 C46 Pin 23 C54 Pin 31 C62
Pin 8 C39 Pin 16 C47 Pin 24 C55 Pin 32 C63

Row Pin Connections

The NI TB-2641 and NI TB-2641B 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.

Pin Number Row
1 RO
2 R1
3 R2
4 R3
5 R4
6 R5
7 R6
8 R7
9–16

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.

Bypassed Row NI TB-2641 Module Interface Board NI TB-2641B
Header Pins Connected Header Pins Connected
R0 J4 1-2 J14 1-2
R1 J4 3-4 J14 3-4
R2 J4 5-6 J14 5-6
R3 J4 7-8 J14 7-8
R4 J4 9-10 J14 9-10
R5 J4 11-12 J14 11-12
R6 J4 13-14 J14 13-14
R7 J4 15-16 J14 15-16

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.

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