NI PXI-2527 2-Wire 32×1 Multiplexer Topology

Connect to the pins of the NI TB-2627 terminal block to use the NI PXI-2527 as a 2-wire 32×1 multiplexer. In this topology, all positive leads (CH0+ through CH31+) route to both COM0+ and COM1+; all negative leads (CH0– through CH31–) route to both COM0– and COM1–. The pair COM0+ and COM0– is addressed as com0 in software, and the pair COM1+ and COM1– is addressed as com1 in software. In this topology, COM0+ is connected to COM1+, and COM0– is connected to COM1–.

The following figure represents the NI PXI-2527 in the 2-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 CH2+ is routed to COM0+

signal connected to CH2– is routed COM0–

Pinout

The following figure and table identify the pins for the NI PXI-2527 in the 2-wire 32×1 multiplexer topology.