Please verify shield to ground connection (diagram included)

Discussion in 'General Electronics Chat' started by tpny, Dec 18, 2012.

  1. tpny

    Thread Starter Member

    May 6, 2012
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    0
    HI I have a sensor with 4 wires and a shield wrapping inside the transmission cable. 2 of the 4 wires are power and ground (12V and 0V), the other 2 are signal (0~5V). Please take a look at the diagram to see where I should connect the shield to ground. Thank you!
     
  2. tpny

    Thread Starter Member

    May 6, 2012
    216
    0
    oops forgot to enclose attachments
     
  3. Mike33

    AAC Fanatic!

    Feb 4, 2005
    349
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    Hi,
    I'd just tie it where it's convenient, honestly...to the enclosure (provided it is also grounded), OR at the PCB. Not sure what you're 'sensing', but for audio applications, any shield ground seems to work just fine. One end of the shield gets grounded only, of course!

    If you have any 'noise' issues, move the ground elsewhere, but I don't think you would. Generally, I try to keep the grounds in a "star" configuration, so that would mean placing it where the power supply grounds....hope this helps, good luck!
     
  4. ScottWang

    Moderator

    Aug 23, 2012
    4,850
    767
    The better way is two side of the connectors all connect the shield to the GND.
     
  5. tpny

    Thread Starter Member

    May 6, 2012
    216
    0
    the most 'convenient' would be to short the shield to the ground wire at the cable connector (on the sensor side, where Q1 indicates).

    But I think the general recommendation is to tie the shield to the pcb digital ground (where Q2 indicates). Is that correct? Is there a difference?
     
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