2-Wire 4×64 Matrix

Software name: 2532/2-Wire 4x64 Matrix (NISWITCH_TOPOLOGY_2532_2_WIRE_4X64_MATRIX)

Hardware Diagram

The NI TB-2643B terminal block creates a 2-wire 4×64 matrix topology with the module.


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Making a Connection

Both the scanning command, r2->c1;, and the immediate operation, niSwitch Connect Channels VI or the niSwitch_Connect function with parameters r2 and c1, result in the following connection:

  • signal connected to R2+ is routed to C1+
  • signal connected to R2- is routed to C1-

Terminal Block Connections

The NI TB-2643B terminal block connects banks of the module to create the 2-wire 4×64 matrix topology.


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Column Pin Connections

The following table refers to the J13 connector on the NI TB-2643B.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 C63– Pin 9 C59– Pin 17 C55– Pin 25 C51–
Pin 2 C63+ Pin 10 C59+ Pin 18 C55+ Pin 26 C51+
Pin 3 C62– Pin 11 C58– Pin 19 C54– Pin 27 C50–
Pin 4 C62+ Pin 12 C58+ Pin 20 C54+ Pin 28 C50+
Pin 5 C61– Pin 13 C57– Pin 21 C53– Pin 29 C49–
Pin 6 C61+ Pin 14 C57+ Pin 22 C53+ Pin 30 C49+
Pin 7 C60– Pin 15 C56– Pin 23 C52– Pin 31 C48–
Pin 8 C60+ Pin 16 C56+ Pin 24 C52+ Pin 32 C48+

The following table refers to the J12 connector on the NI TB-2643B.

Pin Number Column Pin Number Column Pin Number Column Pin Number Column
Pin 1 C47– Pin 9 C43– Pin 17 C39– Pin 25 C35–
Pin 2 C47+ Pin 10 C43+ Pin 18 C39+ Pin 26 C35+
Pin 3 C46– Pin 11 C42– Pin 19 C38– Pin 27 C34–
Pin 4 C46+ Pin 12 C42+ Pin 20 C38+ Pin 28 C34+
Pin 5 C45– Pin 13 C41– Pin 21 C37– Pin 29 C33–
Pin 6 C45+ Pin 14 C41+ Pin 22 C37+ Pin 30 C33+
Pin 7 C44– Pin 15 C40– Pin 23 C36– Pin 31 C32–
Pin 8 C44+ Pin 16 C40+ Pin 24 C36+ Pin 32 C32+

The following table refers to the J3 connector on the NI TB-2643B.

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-2643B.

Test 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-2643B 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 lists the pin assignments for row connection.

Pin Number Row
1 RO+
2 R0–
3 R1+
4 R1–
5 R2+
6 R2–
7 R3+
8 R3–
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-2643B
Header Pins Connected
R0+ J14 1-2
R0- J14 3-4
R1+ J14 5-6
R1- J14 7-8
R2+ J14 9-10
R2- J14 11-12
R3+ J14 13-14
R3- J14 15-16