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Sensor with 4-20mA output

Discussion in 'Beginner Electronics' started by Brian Gregory [UK], Aug 30, 2005.

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  1. A sensor needs to be modified to work off a 24V DC supply and provide a
    4-20mA output.

    How is this normally done?

    Is it okay if the 4-20mA output has a common connection with the power
    supply or should it be totally isolated. What is normally expected by
    typical control equipment?

    Someone must do this regularly.
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