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Original question:

RCV420: Can RCV420 be used with AC current input.

RCV420: Isolated 4-20mA receiver circuit consult

Lin_Charles
Expert 4260 points
Part Number: RCV420

Hi team,

   I want to measure two channels signal of 4-20mA and these two channels have to be isolated. How to use RCV420 do such function? Thanks,

  • 0
    TI__Guru* 93105 points

    Hi Charles,

    If two channels have separate 4-20 mA sources and they are required to have their output voltages isolated from each other, that calls for two separate RCV420 devices. Attempting to use relays and other electronic components  to provide complete isolation would could result in higher circuit complexity and cost compared to just using the two RCV420 devices. 

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Thomas Kuehl
    TI__Expert 4260 points

    Hi Thomas,

       Thank you for your response here. I just want to check for the two RCV420 solution, the power for these two amplifier need to be isolated? Right? Thanks.

  • 0 in reply to Lin_Charles
    TI__Guru* 93105 points

    Hi Charles,

    Certainly, if complete galvanic isolation is required for each of the RCV420 channels. 

    Regards, Thomas

    Precision Amplifiers Applications Engineering