NI SCXI-1163R Octal 4×1 Multiplexer Topology
The NI SCXI-1326 terminal block provides connections to the NI SCXI-1163R in the octal 4×1 multiplexer topology. The following figure represents the NI SCXI-1163R as an octal 4×1 multiplexer.
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Making a Connection
The NI SCXI-1163R contains eight banks of four input channels connected to a common channel. These input channels are referred to as ch<0..31> and eight common channels are referred to as com<0..7>. Because the NI SCXI-1163R is comprised of eight banks of four relays each, you can only connect channels to the common channel in the same bank. The banks are organized as follows:
| Input Channels | Common Channel |
|---|---|
| ch0, ch1, ch2, ch3 | com0 |
| ch4, ch5, ch6, ch7 | com1 |
| ch8, ch9, ch10, ch11 | com2 |
| ch12, ch13, ch14, ch15 | com3 |
| ch16, ch17, ch18, ch19 | com4 |
| ch20, ch21, ch22, ch23 | com5 |
| ch24, ch25, ch26, ch27 | com6 |
| ch28, ch29, ch30, ch31 | com7 |
For example, you can connect ch8 to com2; however, you cannot connect ch8 to com6.
You can control the channels of the NI SCXI-1163R using the niSwitch Connect Channels VI or the niSwitch_Connect function. For example, to connect channel 16 to common 4, call the niSwitch Connect Channels VI or the niSwitch_Connect function with the channel 1 parameter set to ch16 and the channel 2 parameter set to com4.
Pinout
The following figure identifies the pins for the NI SCXI-1163R as an octal 4×1 multiplexer.
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Note Pins labeled GND are the common terminals in each 8×1 multiplexer. These pins are not connected to ground. |
