Laddr logic S-R Latch

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Discussion in 'General Electronics Chat' started by hp1729, Jan 31, 2016.

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  1. Jan 31, 2016 #1
    hp1729

    Thread Starter Well-Known Member

    Nov 23, 2015
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    Does this work for a ladder logic S-R latch?
     
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  2. Jan 31, 2016 #2
    MaxHeadRoom

    Expert

    Jul 18, 2013
    16,588
    4,906
    Doesn't seem to make sense? Labels don't seem correct/consistent?
    Looks like there should be AND contacts in there?
    Max.
     
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  3. Jan 31, 2016 #3
    hp1729

    Thread Starter Well-Known Member

    Nov 23, 2015
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    284
    Errors are very possible.
    Intended operation …
    If the “S” (Set) switch is pressed relay Joan is pulled. Contact Joan-not over on the Reset side is open. If “R” (Reset) is not pressed relay Joe is not activated. Contact Joe-Not over on the Set side is closed, holding the set Relay pulled.
    Set switch can be released.
    When the “R” (Reset) switch is pressed relay Joe is pulled. Contact Joe-not over on the Set side is open. If “S” (Set) is not pressed relay Joan is not activated. Contact Joan-Not over on the Reset side is closed, holding the Reset Relay pulled.
    Reset switch can be released.
     
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