NI PXI-2530 4-Wire 32×1 Multiplexer Topology

Use the NI TB-2630 terminal block with the NI PXI-2530 as a 4-wire 32×1 multiplexer. In this topology, all positive "A" leads (CH0A+ through CH31A+) route to COM0A+. All negative "A" leads (CH0A– through CH31A–) route to COM0A–. All positive "B" leads (CH0B+ through CH31B+) route to COM0B+. All negative "B" leads (CH0B– through CH31B–) route to COM0B–. COM0A+, COM0A–, COM0B+, and COM0B– are addressed collectively as com0 in software.

The following figure represents the NI PXI-2530 in the 4-wire 32×1 multiplexer topology.

Making a Connection

Both the scanning command, ch2->com0;, and the immediate operation, niSwitch Connect Channels VI or the niSwitch_Connect function with parameters ch2 and com0, result in the following connections:

signal connected to CH2A+ is routed to COM0A+

signal connected to CH2A– is routed to COM0A–

signal connected to CH2B+ is routed to COM0B+

signal connected to CH2B– is routed to COM0B–

Signal Connections

Refer to the Signal Connections section for the NI PXI-2530 front connector pinout and NI TB-2630 terminal mapping.