Relay

Discussion in 'General Discussion' started by Deo Joseph, Apr 1, 2017.

  1. Deo Joseph

    Deo Joseph New Member

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    Hi..
    i would like to control electrical appliances like fluorescent lamps (inductive load).
    Anyone please suggest me which relay should i use?
    Requirements:
    DC controlled relay(5-12V), AC switching(230VAC/20A)
    I need a industry standard highly reliable Electromagnetic relay..
     
  2. sirrab

    sirrab Member

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    Solid state relay might be a good choice for inductive loads. www.digi-key.com has a nice user interface for selecting electronic components.
     
  3. Deo Joseph

    Deo Joseph New Member

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    solid state relays do have some limitations. so i am searching for electromagnetic relay..what if i make use of the following relay
    G7L-1A-TUB-J-CB-DC12
     
  4. sirrab

    sirrab Member

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    158ma coil current will need driver transistor.
     
  5. Deo Joseph

    Deo Joseph New Member

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    ya for that..what if i use TPL7407L as a relay driver?
     
  6. sirrab

    sirrab Member

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    Yes, if you were driving 7 relays!
     
  7. Deo Joseph

    Deo Joseph New Member

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    ok.. thank you for all your valuable inputs!
     
  8. Deo Joseph

    Deo Joseph New Member

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    hi everyone..
    i need a power supply to drive relay coil (12V DC).
    i am planning for dual output power supply with 5V and 12V dc output so that i can power up both UDOO and Relay.
    What should be the current rating of the supply?
     
  9. sirrab

    sirrab Member

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    A single general purpose transistor would be simple and cheaper.
     
  10. Deo Joseph

    Deo Joseph New Member

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    ok
    what if i am powering up 48 relays each with supply voltage of 12v dc and 160mA current.
    then what should be the power supply rating?
     
  11. sirrab

    sirrab Member

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    48 relays times 160ma, plus some extra for consistent operation. Which equals 7.68 Amps, plus some extra. So 10-15 Amp 12v supply. Are you going to switch every relay at once? Probably not. Are you going to use latching relays? If you do, you'll reduce static current draw. Which would ease the current requirements.
     
  12. Deo Joseph

    Deo Joseph New Member

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    Hi Sirrab..

    Yes! only few relays will be ON at once (Rarely all) . What is the difference between Latching and non latching relay which one will be better for switching AC Lamps?
     
  13. sirrab

    sirrab Member

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    Either one will work for lamps. Latching relays take a pulse to switch, the other you have to keep the relay energized when switched.
     
  14. Deo Joseph

    Deo Joseph New Member

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  15. Laura

    Laura Active Member

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    @Deo Joseph You will learn more by researching that information by yourself. All the dimensions are listed on the datasheet (available from that Mouser page you linked to). As you will need to mount the relays, I suggest you use a program like KiCad, and then use the footprint you created to place them along with the required PCB traces. An alternative to creating the footprint yourself, is to download the CAD file for the relay, which might possibly be found on the following page - http://www.omron.com/ecb/support/download/ry.html
     
  16. Deo Joseph

    Deo Joseph New Member

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  17. Deo Joseph

    Deo Joseph New Member

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    hi..
    which are the electromechanical relays suitable for controlling the fluorescent lamp with electronic ballast???
     

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