NI PXI-2527 1-Wire 64×1 Multiplexer Topology

Connect to the pins of the NI TB-2627 terminal block to use the NI PXI-2527 as a 1-wire 64×1 multiplexer. In this topology, all channel terminals (CH0 through CH63) route to both COM0+ and COM1+. The 1WREF0 lead is connected to COM0–, and the 1WREF1 lead is connected to 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+.

The following figure represents the NI PXI-2527 in the 1-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+

Pinout

The following figure and table identify the pins for the NI PXI-2527 in the 1-wire 64×1 multiplexer topology.