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.
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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.
| Software Name | Pin Number | Software Name | Pin Number | ||
|---|---|---|---|---|---|
| + | – | + | – | ||
| ch0 | A1 | B1 | ch18 | A11 | B11 |
| ch1 | D1 | C1 | ch19 | D11 | C11 |
| ch2 | A2 | B2 | ch20 | A12 | B12 |
| ch3 | D2 | C2 | ch21 | D12 | C12 |
| ch4 | A3 | B3 | ch22 | A13 | B13 |
| ch5 | D3 | C3 | ch23 | D13 | C13 |
| ch6 | A4 | B4 | ch24 | A14 | B14 |
| ch7 | D4 | C4 | ch25 | D14 | C14 |
| ch8 | A5 | B5 | ch26 | A15 | B15 |
| ch9 | D5 | C5 | ch27 | D15 | C15 |
| ch10 | A6 | B6 | ch28 | A16 | B16 |
| ch11 | D6 | C6 | ch29 | D16 | C16 |
| ch12 | A7 | B7 | ch30 | A17 | B17 |
| ch13 | D7 | C7 | ch31 | D17 | C17 |
| ch14 | A8 | B8 | com0 | A9 | B9 |
| ch15 | D8 | C8 | com1 | A18 | B18 |
| ch16 | A10 | B10 | cjtemp | A25 | D25 |
| ch17 | D10 | C10 | — | — | — |