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Test Fixture patch bay Diodes?

Discussion in 'General Electronics Discussion' started by Davewalker5, Sep 28, 2014.

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  1. Davewalker5

    Davewalker5

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    Sep 20, 2014
    On test fixtures , they have a patch bays that has multiple jacks on the front panel

    What does these diodes do? the diodes are in series

    If you plug the wrong jacks together, how does these diodes protect the text fixture?

    If a tech injected a Positive voltage into a jack , how would a series diode protect the text fixture?
    If a tech injected a Negative voltage into a jack, how would a series diode protect the test fixture?
     

    Attached Files:

  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,295
    2,586
    Nov 17, 2011
    You need to supply more information:
    - What kind of patch bay is this?
    - What are the test fixtures used for?
    - Where does the DC voltage (left side of your pictures) come from?
    - Where does the right side (patch bay jack) go to?
    - Why would someone "inject" a voltage on the patch bay jack's side? The power seems to be supplied from the left (DC voltage).
     
  3. Davewalker5

    Davewalker5

    125
    0
    Sep 20, 2014
    Harald kapp

    here is the pictures of the patch bays on the test fixture

    Also I don't know the names of the size of the red and yellow patch bay cables and plugs are called, do you guys know?

    But each jack on the patch bay has a series diode soldered to the jack to a wire that does to the test fixture

    The Series diode is to protect the test fixture, but how so?

    If the patch cable is in the wrong test fixture jack to another jack it will damage the test fixture, the series diode protects the test fixture from wrong connections

    Some Test fixture tests have +15 vdc, -15vdc, other AC and DC voltages
     

    Attached Files:

  4. Harald Kapp

    Harald Kapp Moderator Moderator

    11,295
    2,586
    Nov 17, 2011
    We cannot answer your questions without knowing how the test fixture works.
     
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