NI PXI/PXIe-2532/2532B 2-Wire 8×32 Matrix Topology

NI Switches Help

Edition Date: April 2015

Part Number: 375472H-01

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The NI TB-2644 terminal block creates a 2-wire 8×32 matrix topology with the NI PXI/PXIe-2532 (NI 2532). The NI TB-2644B terminal block creates a 2-wire 8×32 matrix topology with the NI PXI/PXIe-2532B (NI 2532B). The following figure represents the NI 2532/2532B in the 2-wire 8×32 matrix topology.

Making a Connection

Both the scanning command, r6->c1;, and the immediate operation, niSwitch Connect Channels VI or the niSwitch_Connect function with parameters r6 and c1, result in the following connections:

signal connected to R6+ is routed to C1+

signal connected to R6– is routed to C1–

Terminal Block Connections

The NI TB-2644 terminal block connects the banks of the NI 2532 to create the 2-wire 8×32 matrix topology. The NI TB-2644B terminal block connects the banks of the NI 2532B to create the 2-wire 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 2-wire 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.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 C0+ Pin 9 C4+ Pin 17 C8+ Pin 25 C12+
Pin 2 C0– Pin 10 C4– Pin 18 C8– Pin 26 C12–
Pin 3 C1+ Pin 11 C5+ Pin 19 C9+ Pin 27 C13+
Pin 4 C1– Pin 12 C5– Pin 20 C9– Pin 28 C13–
Pin 5 C2+ Pin 13 C6+ Pin 21 C10+ Pin 29 C14+
Pin 6 C2– Pin 14 C6– Pin 22 C10– Pin 30 C14–
Pin 7 C3+ Pin 15 C7+ Pin 23 C11+ Pin 31 C15+
Pin 8 C3– Pin 16 C7– Pin 24 C11– Pin 32 C15–


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.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 C16+ Pin 9 C20+ Pin 17 C24+ Pin 25 C28+
Pin 2 C16– Pin 10 C20– Pin 18 C24– Pin 26 C28–
Pin 3 C17+ Pin 11 C21+ Pin 19 C25+ Pin 27 C29+
Pin 4 C17– Pin 12 C21– Pin 20 C25– Pin 28 C29–
Pin 5 C18+ Pin 13 C22+ Pin 21 C26+ Pin 29 C30+
Pin 6 C18– Pin 14 C22– Pin 22 C26– Pin 30 C30–
Pin 7 C19+ Pin 15 C23+ Pin 23 C27+ Pin 31 C31+
Pin 8 C19– Pin 16 C23– Pin 24 C27– Pin 32 C31–

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.

Pin Number Row
1 R0+
2 R0–
3 R1+
4 R1–
5 R2+
6 R2–
7 R3+
8 R3–
9 R4+
10 R4–
11 R5+
12 R5–
13 R6+
14 R6–
15 R7+
16 R7–

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-2644 Module Interface Board NI TB-2644B
Header Pins Connected Header Pins Connected
R0+ N/A N/A J14 1-2
R0- N/A N/A J14 3-4
R1+ N/A N/A J14 5-6
R1- N/A N/A J14 7-8
R2+ N/A N/A J14 9-10
R2- N/A N/A J14 11-12
R3+ N/A N/A J14 13-14
R3- N/A N/A J14 15-16
R4+ N/A N/A J15 1-2
R4- N/A N/A J15 3-4
R5+ N/A N/A J15 5-6
R5- N/A N/A J15 7-8
R6+ N/A N/A J15 9-10
R6- N/A N/A J15 11-12
R7+ N/A N/A J15 13-14
R7- N/A N/A J15 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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