NI PXI-2527 4-Wire 16×1 Multiplexer Topology
Connect to the pins of the NI TB-2627 terminal block to use the NI PXI-2527 as a 4-wire 16×1 multiplexer. In this topology, all positive "A" leads (CH0A+ through CH15A+) route to COM0+. All negative "A" leads (CH0A– through CH15A–) route to COM0–. All positive "B" leads (CH0B+ through CH15B+) route to COM1+. All negative "B" leads (CH0B– through CH15B–) route to COM1–. COM0+, COM0–, COM1+, and COM1– are addressed as com0 in software.
The following figure represents the NI PXI-2527 in the 4-wire 16×1 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 COM0–
signal connected to CH18+ is routed to COM1+
signal connected to CH18– is routed to COM1–
Pinout
The following figure and table identify the pins for the NI PXI-2527 in the 4-wire 16×1 multiplexer topology.
| Software Name | Pin Number | |||
|---|---|---|---|---|
| A+ | A– | B+ | B– | |
| ch0 | A1 | B1 | A10 | B10 |
| ch1 | D1 | C1 | D10 | C10 |
| ch2 | A2 | B2 | A11 | B11 |
| ch3 | D2 | C2 | D11 | C11 |
| ch4 | A3 | B3 | A12 | B12 |
| ch5 | D3 | C3 | D12 | C12 |
| ch6 | A4 | B4 | A13 | B13 |
| ch7 | D4 | C4 | D13 | C13 |
| ch8 | A5 | B5 | A14 | B14 |
| ch9 | D5 | C5 | D14 | C14 |
| ch10 | A6 | B6 | A15 | B15 |
| ch11 | D6 | C6 | D15 | C15 |
| ch12 | A7 | B7 | A16 | B16 |
| ch13 | D7 | C7 | D16 | C16 |
| ch14 | A8 | B8 | A17 | B17 |
| ch15 | D8 | C8 | D17 | C17 |
| com0 | A9 | B9 | A18 | B18 |
| cjtemp | A25 | D25 | — | — |