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Analogue pros and cons

Discussion in 'General Electronics Chat' started by sparks5, Mar 23, 2012.

  1. sparks5

    Thread Starter New Member

    Mar 23, 2012
    2
    0
    Can anyone explain the pros and cons for the use of 4-20mA and 0-5v, 10v signals.
     
  2. crutschow

    Expert

    Mar 14, 2008
    23,116
    6,854
    4-20mA current signals are used where you want a two wire connection over a long distance and need to minimize interference, since it has good common-mode voltage noise rejection. It also allows both signal and power for remote sensors to be transmitted over the same two wires.

    0-5V or 10V single-ended voltage signals are typically send for short distances within an electronic box where common-mode noise is not a problem
     
  3. sparks5

    Thread Starter New Member

    Mar 23, 2012
    2
    0
    Thanks for the info. I have a 20 m run through twisted pair cable s
    o 4-20mA it is
     
  4. bertus

    Administrator

    Apr 5, 2008
    19,915
    4,142
    Hello,

    An other advantage of the 4-20 mA system, is that you can see a wire break.
    If there is a wire break, no current will be present.

    Bertus
     
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