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NI Digital In Module with High Impedance input

Hi ,

Do NI have a Digital In module with High Impedance (390K) or more

Input Voltage 0-50V

 

Like dSpace DS4004 digital Input Line

 

I find only 4mA input current , it is to high for the ECU application. (Open circuit detection)

 

Thanks

 

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Can you run it through a buffer, like an op-amp, that offers zero gain but an extremely high input-Z? 

 

I've had to use an op-amp as a voltage follower to raise the input-Z from a photodiode before running it into the low-Z input on the DAQ.  Works well if the slew rate is acceptable.

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OK ,

 

Thanks I thought about this solution

 

But I need to built a PCB or Proto before a NI card

 

NI don't provide direct HIGH impedance DIN solution

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Hello Boutch19.

 

I sent you a PM to talk further about your applications and your needs for you to be contacted by one of our sales engineers. They will be glad to assist you and give you further orientation. 

 

Warm Regards and best of luck with your application,

 

 

Fabián M.
Internal Sales Engineer
National Instruments
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