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

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.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 B0C0 Pin 9 B0C4 Pin 17 B0C8 Pin 25 B0C12
Pin 2 B1C0 Pin 10 B1C4 Pin 18 B1C8 Pin 26 B1C12
Pin 3 B0C1 Pin 11 B0C5 Pin 19 B0C9 Pin 27 B0C13
Pin 4 B1C1 Pin 12 B1C5 Pin 20 B1C9 Pin 28 B1C13
Pin 5 B0C2 Pin 13 B0C6 Pin 21 B0C10 Pin 29 B0C14
Pin 6 B1C2 Pin 14 B1C6 Pin 22 B1C10 Pin 30 B1C14
Pin 7 B0C3 Pin 15 B0C7 Pin 23 B0C11 Pin 31 B0C15
Pin 8 B1C3 Pin 16 B1C7 Pin 24 B1C11 Pin 32 B1C15

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 B0C16 Pin 9 B0C20 Pin 17 B0C24 Pin 25 B0C28
Pin 2 B1C16 Pin 10 B1C20 Pin 18 B1C24 Pin 26 B1C28
Pin 3 B0C17 Pin 11 B0C21 Pin 19 B0C25 Pin 27 B0C29
Pin 4 B1C17 Pin 12 B1C21 Pin 20 B1C25 Pin 28 B1C29
Pin 5 B0C18 Pin 13 B0C22 Pin 21 B0C26 Pin 29 B0C30
Pin 6 B1C18 Pin 14 B1C22 Pin 22 B1C26 Pin 30 B1C30
Pin 7 B0C19 Pin 15 B0C23 Pin 23 B0C27 Pin 31 B0C31
Pin 8 B1C19 Pin 16 B1C23 Pin 24 B1C27 Pin 32 B1C31

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 B0R0
2 B1R0
3 B0R1
4 B1R1
5 B0R2
6 B1R2
7 B0R3
8 B1R3
9 B0R4
10 B1R4
11 B0R5
12 B1R5
13 B0R6
14 B1R6
15 B0R7
16 B1R7

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
B0R0 N/A N/A J14 1-2
B1R0 N/A N/A J14 3-4
B0R1 N/A N/A J14 5-6
B1R1 N/A N/A J14 7-8
B0R2 N/A N/A J14 9-10
B1R2 N/A N/A J14 11-12
B0R3 N/A N/A J14 13-14
B1R3 N/A N/A J14 15-16
B0R4 N/A N/A J15 1-2
B1R4 N/A N/A J15 3-4
B0R5 N/A N/A J15 5-6
B1R5 N/A N/A J15 7-8
B0R6 N/A N/A J15 9-10
B1R6 N/A N/A J15 11-12
B0R7 N/A N/A J15 13-14
B1R7 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.