2-Wire Dual 4×32 Matrix

Software name: 2532/2-Wire Dual 4x32 Matrix (NISWITCH_TOPOLOGY_2532_2_WIRE_DUAL_4X32_MATRIX)

Hardware Diagram

The NI TB-2646B terminal block creates a 2-wire dual 4×32 matrix topology with the module.


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Making a Connection

For bank 0, both the scanning command, b0r2->b0c1;, and the immediate operation, niSwitch Connect Channels VI or the niSwitch_Connect function with parameters b0r2 and b0c1, result in the following connection:

  • signal connected to B0R2+ is routed to B0C1+
  • signal connected to B0R2- is routed to B0C1-
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-2646B terminal block connects banks of the module to create the 2-wire dual 4×32 matrix topology.


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Column Pin Connections

The following table refers to the J13 connector on the NI TB-2646B.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 B1C31– Pin 9 B1C27– Pin 17 B1C23– Pin 25 B1C19–
Pin 2 B1C31+ Pin 10 B1C27+ Pin 18 B1C23+ Pin 26 B1C19+
Pin 3 B1C30– Pin 11 B1C26– Pin 19 B1C22– Pin 27 B1C18–
Pin 4 B1C30+ Pin 12 B1C26+ Pin 20 B1C22+ Pin 28 B1C18+
Pin 5 B1C29– Pin 13 B1C25– Pin 21 B1C21– Pin 29 B1C17–
Pin 6 B1C29+ Pin 14 B1C25+ Pin 22 B1C21+ Pin 30 B1C17+
Pin 7 B1C28– Pin 15 B1C24– Pin 23 B1C20– Pin 31 B1C16–
Pin 8 B1C28+ Pin 16 B1C24+ Pin 24 B1C20+ Pin 32 B1C16+

The following table refers to the J12 connector on the NI TB-2646B.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 B1C15– Pin 9 B1C11– Pin 17 B1C7– Pin 25 B1C3–
Pin 2 B1C15+ Pin 10 B1C11+ Pin 18 B1C7+ Pin 26 B1C3+
Pin 3 B1C14– Pin 11 B1C10– Pin 19 B1C6– Pin 27 B1C2–
Pin 4 B1C14+ Pin 12 B1C10+ Pin 20 B1C6+ Pin 28 B1C2+
Pin 5 B1C13– Pin 13 B1C9– Pin 21 B1C5– Pin 29 B1C1–
Pin 6 B1C13+ Pin 14 B1C9+ Pin 22 B1C5+ Pin 30 B1C1+
Pin 7 B1C12– Pin 15 B1C8– Pin 23 B1C4– Pin 31 B1C0–
Pin 8 B1C12+ Pin 16 B1C8+ Pin 24 B1C4+ Pin 32 B1C0+

The following table refers to the J3 connector on the NI TB-2646B.

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 B0C0– Pin 10 B0C4– Pin 18 B0C8– Pin 26 B0C12–
Pin 3 B0C1+ Pin 11 B0C5+ Pin 19 B0C9+ Pin 27 B0C13+
Pin 4 B0C1– Pin 12 B0C5– Pin 20 B0C9– Pin 28 B0C13–
Pin 5 B0C2+ Pin 13 B0C6+ Pin 21 B0C10+ Pin 29 B0C14+
Pin 6 B0C2– Pin 14 B0C6– Pin 22 B0C10– Pin 30 B0C14–
Pin 7 B0C3+ Pin 15 B0C7+ Pin 23 B0C11+ Pin 31 B0C15+
Pin 8 B0C3– Pin 16 B0C7– Pin 24 B0C11– Pin 32 B0C15–

The following table refers to the J2 connector on the NI TB-2646B.

Test Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 B0C16+ Pin 9 B0C20+ Pin 17 B0C24+ Pin 25 B0C28+
Pin 2 B0C16– Pin 10 B0C20– Pin 18 B0C24– Pin 26 B0C28–
Pin 3 B0C17+ Pin 11 B0C21+ Pin 19 B0C25+ Pin 27 B0C29+
Pin 4 B0C17– Pin 12 B0C21– Pin 20 B0C25– Pin 28 B0C29–
Pin 5 B0C18+ Pin 13 B0C22+ Pin 21 B0C26+ Pin 29 B0C30+
Pin 6 B0C18– Pin 14 B0C22– Pin 22 B0C26– Pin 30 B0C30–
Pin 7 B0C19+ Pin 15 B0C23+ Pin 23 B0C27+ Pin 31 B0C31+
Pin 8 B0C19– Pin 16 B0C23– Pin 24 B0C27– Pin 32 B0C31–

Row Pin Connections

The NI TB-2646B provides 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 refers to the J9 connector on the NI TB-2646B.

Pin Number Row
1 B1R0+
2 B1R0–
3 B1R1+
4 B1R1–
5 B1R2+
6 B1R2–
7 B1R3+
8 B1R3–
9 B0R0+
10 B0R0–
11 B0R1+
12 B0R1–
13 B0R2+
14 B0R2–
15 B0R3+
16 B0R3–

The following table refers to the J4 connector on the NI TB-2646B.

Pin Number Row
1 B0R0+
2 B0R0–
3 B0R1+
4 B0R1–
5 B0R2+
6 B0R2–
7 B0R3+
8 B0R3–
9 B1R0+
10 B1R0–
11 B1R1+
12 B1R1–
13 B1R2+
14 B1R2–
15 B1R3+
16 B1R3–

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-2646B
Header Pins Connected
B0R0+ J14 1-2
B0R0- J14 3-4
B0R1+ J14 5-6
B0R1- J14 7-8
B0R2+ J14 9-10
B0R2- J14 11-12
B0R3+ J14 13-14
B0R3- J14 15-16
B1R0+ J15 1-2
B1R0- J15 3-4
B1R1+ J15 5-6
B1R1- J15 7-8
B1R2+ J15 9-10
B1R2- J15 11-12
B1R3+ J15 13-14
B1R3- J15 15-16