NISwitch connections

[Wadet]

I am using a PXI-2530, with a topology of 8 16X1 multiplexors, (Independent Program Topology). I am wondering how I configure it to connect Bank 1(ch16-ch31) to com2. I can just do a connect command for connecting bank 0 (ch0-ch15) to com0, but on com1, com3, and com5 there is an extra switch in there. How do I close it to allow connections to the respective com output. I am using it as shown in the NI PXI-2530 specifications page 5, figure 1.

Thanks for the help.

[Alan_L]

Wadet,

If you are constrained to using an "Independent" topology, then I have an idea for you. As you can see in the hardware diagram, there is not a switch which connects COM1 and COM2 directly. However, you might consider connecting a wire from 1WREF0 (through relay KREF01) to one of the inputs on Bank 2. This would allow you to connect a channel from Bank 1 to COM 2 (given that you have a spare channel on Bank 2).

I hope this works for you!

Best Regards,
Alan L
Applications Engineer
National Instruments

[Wadet]

I am sorry but what I meant to say is that I am trying to connect Bank 1(ch16-31) to Com1. I also am using TB 2630. I can connect Bank 0 to Com0, Bank 2 to Com2, Bank 4 to Com4, and Bank 6 to Com6, but for some reason the ones with the extra switch do not want to connnect. It erros out saying there is no connection between the points? Any thoughts?

Wade

[Alan_L]

Wade,

Sure. The reason that you're receiving an error when using "Connect Channels" between CH16 and COM1 is that in the "independent" topology there is no direct path between the source and destination. However, you can control the individual relays to make or break the signal connection. I've attached a screenshot of a simple LabVIEW block diagram that will connect CH16 (the first channel on Bank 1) to COM1. Notice that I have to individually close both K1 and KCOM1.

I hope that this helps!

Best Regards,
Alan L
Applications Engineer
National Instruments