Labview compatible low-budget multiplexer

[pannepanda]

Hello everyone,

I am trying to set up a device to automate some of the measurements in our laboratory, which will save a lot of time. Since I am on a budget I would need to know a very cheap source for a multiplexer that can be programmed with Labview. Can anybody recommend me sources? 

Ideally I would need one 30 to 1 multiplexer and another one that can do 10 to 1. However, I could also create smaller batches if that would save money.

Many thanks,

Ralf

[GerdW]

Hi pannepanda,

what kind of signals do you want to multiplex?

To multiplex 30 signals you need 5 bits of information, so an USB6008 might be sufficient to drive your "multiplexer"…

[pannepanda]

The signals are analogue. I just had a quick check on the USB-6008, it has 32 slots. Wouldn't I need 2 of them to multiplex 30-to-1 and 10-to-1, or are there any tricks to avoid this?

Thanks,

Ralf

[GerdW]

Hi pannepanda,

when you talk about "multiplexer" I thought you would need an external device that does the switching, so you would only need to communicate with that external device. The easiest possibility to drive a 30:1 multiplexer is by using 5 DOs…

Please state your needs with clear descriptions!

Do you need a DAQ card to measure up to 32 analog signals? Call your local NI sales representative!

[pannepanda]

That is what I need, a device that switches between 30 signals. I am a chemist and not very familiar with the jargon. But anyhow, I image that I will need 30 input plugs and one output plug for my device. I only know the USB6008 from a short intro to Labview but I think that most of the plugs are only for a certain type of signal, is that right?

[GerdW]

Hi pannepanda,

yes, each input pin has it's name and purpose - see the manual. The USB6008 is only capably to measure 8 analog inputs…

You really should call your local NI office! In Germany you should call 089-7413130…

[NeilR]

Hi pannepanda

The USB6008 is not suitable to multiplex 30 analog signals. It's spec is here...

https://www.ni.com/en-us/support/model.usb-6008.html

Basically it can generate and sense low voltage analog and digital signals with a counter function. It has no multiplexing capability.

NI has a vast selection of data acquistion devices to choose from. As a starting point you need to know the voltage range, current and frequency of the signals you are trying to multiplex. Then contact NI