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    School me on relays...

    So I found a diagram for An application that im doing and it shows me how to wire up a relay. But in the diagram it shows a relay with the following posts numbers.......

    ----87

    85-87a-86

    ----30


    Now I have about 3 relays at home but on the back of 2 of them it shows these following posts numbers...

    ----87

    86-87a-85

    ----30


    and the last one show the same as above but has no marking of ''87a'' in the middle,just a 87. Mind you the middle post is not used in this app anyway..


    With that being would I have to buy new relays that match the post number markings in the diagram?



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    Re: School me on relays...

    87 is your switched on or off, 30 your switche if you will, 85 i believe is power and 86 ground



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    Re: School me on relays...

    So the post numbers wouldnt matter?



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    Re: School me on relays...

    Quote Originally Posted by rocky 59 View Post
    87 is your switched on or off, 30 your switche if you will, 85 i believe is power and 86 ground

    So 87 and 30 is the coil?



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    Re: School me on relays...

    i believe so yes



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    Re: School me on relays...

    85 -
    86 +
    30 is your source
    87 and 87a are you outputs

    85 and 86 are the coil add a switch to either to control the relay.



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    Re: School me on relays...




    Natural selection at work.

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    Re: School me on relays...

    87a is your normally closed output
    87 is normally open



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    Re: School me on relays...

    OK, so 85/86 is the coil/trigger and 87a n/c 87 n/o



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    Re: School me on relays...

    Quote Originally Posted by Stephen_c View Post
    85 and 86 are the coil add a switch to either to control the relay.

    So that means I can can use the relays I have now?

    Basically, It dont matter which side 86 and 85 are on? They do the same thing?



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    Re: School me on relays...

    85 is connected to the ground of the triggering voltage.
    86 is connected to the positive 12V of the triggering voltage.

    Taken from P/E


    Test it by connecting this way, if you hear a "click" when voltage is applied it works.



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    Re: School me on relays...

    it doesnt matter which side 85 and 86 are on and it doesnt matter if 85 or 86 is positvie or negative. just know you need a ground on one and power on the other to energize the relay.



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    Re: School me on relays...

    Just checked with a spare relay, blue is right polarity doesnt matter.



    Past scores-

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    141.0
    Custom PSI 10" 5.25 depth ported aq2200 1994 ford ranger

    139.9
    RE SR 10" on ED 9.2x 1994 ford ranger ported

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    Re: School me on relays...

    Ok the reason for asking is because in the diagram in the link below,notice the 85 is on the left and 86 is on the right. and the relay I got at home the 86 is on the left and the 85 is on the right.

    http://64.85.6.129/extrainfo/diagram...BS%20UNITS.pdf

    And notice here in this diagram below the 86 is on the left and the 85 is on the right(like the one i got at home). So that made me think there were 2 different type of relays.

    http://64.85.6.129/extrainfo/diagram...%20DIAGRAM.pdf



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    Re: School me on relays...

    yeah but it doesnt matter. which side 85 or 86 is on they are both single pole single throw relays.



    The best beer is the one that makes you forget about your wife! And usually is served in a nudie bar --- what a coincidence. -Al Bundy

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