NI PXI/PXIe-2532/2532B 1-Wire Dual 16×16 Matrix Topology

The NI TB-2645 terminal block creates a 1-wire dual 16×16 matrix topology with the NI PXI/PXIe-2532 (NI 2532). The NI TB-2645B terminal block creates a 1-wire dual 16×16 matrix topology with the NI PXI/PXIe-2532B (NI 2532B).The following figure represents the NI 2532/2532B in the 1-wire dual 16×16 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-2645 terminal block connects the banks of the NI 2532 to create the 1-wire dual 16×16 matrix topology. The NI TB-2645B terminal block connects the banks of the NI 2532B to create the 1-wire dual 16×16 matrix topology. The following figure illustrates how the native banks on the NI 2532/2532B connect using the NI TB-2645/2645B to create the 1-wire dual 16×16 matrix topology.

Bank Connection Diagram

The following table lists the pin assignments for the NI TB-2645/2645B column ribbon cable headers.

Column Pin Connections

The following table refers to the J3 connector on the NI TB-2645 column connection board and the J3 connector on the NI TB-2645B.

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

Note  The column connection board J2 connector on the NI TB-2645 is not used in this configuration.

Row Pin Connections

The NI TB-2645/2645B requires two row ribbon cables for row connections. The NI TB-2645 provides one pair of ribbon cable headers to connect your application. The NI TB-2645B provides two pairs of ribbon cable headers. Use one cable header pair to connect to your application and the other for column expansion.

The following tables list the pin assignments for row connection.

The following table refers to the J2 connector on the NI TB-2645 Module Interface Board and the J4 and J5 connectors on the NI TB-2645B.

Pin Number	Row
Pin 1	B0R0
Pin 2	B1R0
Pin 3	B0R1
Pin 4	B1R1
Pin 5	B0R2
Pin 6	B1R2
Pin 7	B0R3
Pin 8	B1R3
Pin 9	B0R4
Pin 10	B1R4
Pin 11	B0R5
Pin 12	B1R5
Pin 13	B0R6
Pin 14	B1R6
Pin 15	B0R7
Pin 16	B1R7

The following table refers to the J3 connector on the NI TB-2645 Module Interface Board and the J6 and J7 connectors on the NI TB-2645B.

Pin Number	Row
Pin 1	B0R8
Pin 2	B1R8
Pin 3	B0R9
Pin 4	B1R9
Pin 5	B0R10
Pin 6	B1R10
Pin 7	B0R11
Pin 8	B1R11
Pin 9	B0R12
Pin 10	B1R12
Pin 11	B0R13
Pin 12	B1R13
Pin 13	B0R14
Pin 14	B1R14
Pin 15	B0R15
Pin 16	B1R15

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-2645 Module Interface Board		NI TB-2645B
	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
B0R8	N/A	N/A	J16	1-2
B1R8	N/A	N/A	J16	3-4
B0R9	N/A	N/A	J16	5-6
B1R9	N/A	N/A	J16	7-8
B0R10	N/A	N/A	J16	9-10
B1R10	N/A	N/A	J16	11-12
B0R11	N/A	N/A	J16	13-14
B1R11	N/A	N/A	J16	15-16
B0R12	N/A	N/A	J17	1-2
B1R12	N/A	N/A	J17	3-4
B0R13	N/A	N/A	J17	5-6
B1R13	N/A	N/A	J17	7-8
B0R14	N/A	N/A	J17	9-10
B1R14	N/A	N/A	J17	11-12
B0R15	N/A	N/A	J17	13-14
B1R15	N/A	N/A	J17	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.