NI PXI-2530 2-Wire 64×1 Multiplexer Topology

Use the NI TB-2630 terminal block with the NI PXI-2530 as a 2-wire 64×1 multiplexer. In this topology, all positive leads (CH0+ through CH63+) route to COM0+, and all negative leads (CH0– through CH63–) route to COM–. The pair COM0+ and COM– is addressed collectively as com0 in software.

The following figure represents the NI PXI-2530 in the 2-wire 64×1 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 CH2+ is routed to COM0+

signal connected to CH2– is routed to COM–

Signal Connections

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