Connect with us

Relay with separate switch integration

Discussion in 'Power Electronics' started by Mjthall, Jun 22, 2022.

Scroll to continue with content
  1. Mjthall

    Mjthall

    3
    0
    Jun 22, 2022
    Hi I'm trying to integrate a separate switch with relay switch.. Not entirely 100% sure I'm correct see picture.

    There's a max 45amp of current through the relay and the separate switch is 15amp.

    Screenshot_20220622_175811.jpg
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    12,456
    2,985
    Nov 17, 2011
    You feed back the negative f the switched load side (45 A) through the 15 A switch. Here's a better way:
    upload_2022-6-22_8-12-19.png

    Note that for 45 A you'll need AWG 5 or thicker wire.
     
  3. Kiwi

    Kiwi

    406
    110
    Jan 28, 2013
    As Harald advised, connect battery negative directly to the load and relay pin 85. Don't need to use the black wires on the switch.
     
  4. Bluejets

    Bluejets

    5,616
    1,190
    Oct 5, 2014
    Black on the switch might be for an LED.......
     
    Martaine2005 likes this.
  5. Mjthall

    Mjthall

    3
    0
    Jun 22, 2022
    Thanks Harald. So that black wire I had wrong can be left redundant?
     
  6. Harald Kapp

    Harald Kapp Moderator Moderator

    12,456
    2,985
    Nov 17, 2011
    No. The current will find its way through this wire, when present and possibly overload it.
    You also do not need the other black wire from the relay pin 85 to the switch. It suffices to switch "+" only (red wires).
     
  7. Mjthall

    Mjthall

    3
    0
    Jun 22, 2022
    Hard to see in the picture but the switch has a green led light. Will that mean that doesn't work? Would be good to have that going.

    Does it need to be earthed to an appropriate current somewhere else?
     
  8. kellys_eye

    kellys_eye

    4,717
    1,312
    Jun 25, 2010
    Not entirely sure of that 15A switch wiring....... are they two separate sets of contacts and, if so, which wires represent which switch?

    Are the two red wires one switch and the two black the other? Or do you wire pos and neg on one pair (in) and take pos/neg (out) on the other pair?

    Get it wrong and you have expensive burned wiring.....
     
    Martaine2005 likes this.
  9. Martaine2005

    Martaine2005

    4,092
    1,122
    May 12, 2015
    Yeah. The switch pin-outs are quite important here.
    As @Bluejets asked. There is a green LED indicator. The OP will need a negative for the LED.


    Martin
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-