NI PXI-2501/2503 2-Wire 4×6 Matrix Topology

When using the NI PXI-2501/2503 as a 2-wire 4×6 matrix, connect your signals using the NI TB-2606 terminal block. The following figure is a representation of the NI PXI-2501/2503 in this mode.

Making a Connection

In this topology, connect your positive and negative leads to Cx± or Rx± inside the NI TB-2606 terminal block.

During immediate operations when you use the niSwitch Connect Channels VI or the niSwitch_Connect function with c0 and r0, the signal connected to C0 ± is routed to R0 ±. To route R0 ± to AB0 ±, use the niSwitch Connect Channels VI or the niSwitch_Connect function with r0 and ab0.

Terminal Block Connections

The NI TB-2606 terminal block creates the following connections to operate the NI PXI-2501/2503 as a 2-wire 4×6 matrix topology. Refer to the pinout for pin locations.

The following table lists the pins the NI TB-2606 shorts and the column connections created.

Connections	Pins	Connections	Pins	Connections	Pins
C0+	67,59,50,40	C2+	65,57,48,38	C4+	63,54,46,36
C0-	33,25,16,6	C2-	31,23,14,4	C4-	29,20,12,2
C1+	66,58,49,39	C3+	64,55,47,37	C5+	62,53,45,35
C1-	32,24,15,5	C3-	30,21,13,3	C5-	28,19,11,1

The following table lists the pins and their associated row connection.

Connections	Pins	Connections	Pins	Connections	Pins	Connections	Pins
R0+	61	R1+	60	R2+	44	R3+	43
R0-	27	R1-	26	R2-	10	R3-	9

Pinout

The following figure identifies the pins for the NI PXI-2501/2503 in the 2-wire 4×6 matrix topology.