3.3V Serial Logic to CRIO

[JScherer]

Hello all,

Long time LabVIEW-er, 1st time systems integrator (they Don't call it HARDware for nothing  )

I have a probe that has the following connection terminals:

GND: Ground ( 0V )
TX: Transmit ( 0 - 3.3V )

RX: Recieve ( 0 - 3.3V )

TRI: Transmit Interrupt (0V = Transmit 3.3V= Don't Transmit)

VIn: ( 3.3V In )

What is my best way to get this device connected to a CRIO system?

Currently I think my best bet is my NI 9401 module, but I also have the NI 9870. I'm open to buying something different if needed, but I would prefer not to. Any guidance would be greatly appreciated.

[crossrulz · Accepted solution]

Is it a UART protocol?  Or is it something else?  If UART, then I would go with the NI-9870 and then use an RS-232 to LV-TTL adapter (for example: 232LPTTL33 from B&B Advantech).

[JScherer]

Thank you. If I'm using the  232LPTTL33  is there a way to get my VCC 3.3V and GND into my device?

[crossrulz]

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@JScherer wrote:

Thank you. If I'm using the  232LPTTL33  is there a way to get my VCC 3.3V and GND into my device?

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No, you will need a separate power supply for your devices.

[JScherer]

Thanks,

I purchased the device you suggested and everything is working as expected.