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Thread: Basic Questions about SainSmart Relay Module

  1. #13
    Registered KH0UJ's Avatar
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    Default Re: Basic Questions about SainSmart Relay Module

    hahahaha, well for as long as you dont exceed 10A/250VAC on your load (pumps) I guess it`s safe enough, that`s what it`s written on the label of your relays, but if you dont feel safe on the specification of the 4 relays you can always put another relay (bigger) on it if you feel safe using it or if your load exceeds 10A@220VAC



  2. #14
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    Default Re: Basic Questions about SainSmart Relay Module

    KHOUJ,

    I'm safe on the load rating of the relay, thanks.

    I do have another question though..I have a dedicated 5V power supply for the ESS and I assume I will tag off of that to provide power to the SainSmart. I think they discuss this in their literature, and it's OK as long as the power supply has the ampacity to power the ESS AND be able to operate the relay coils. My question is, in order to operate the relay, it must be pulled low, (grounded) and that is always in reference to the ground of the power supply, correct? If I were to solder to the board after the opto-isolators and pull that to ground with a push button at a remote location, that circuit must be referenced to the power supply ground, correct?

    I know these are super basic questions for anyone with any electronic experience and I probably have the terminology wrong, but I'm a real green pea at this.

    Stuart

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  3. #15
    Community Moderator Al_The_Man's Avatar
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    Default Re: Basic Questions about SainSmart Relay Module

    If you just want to operate a relay with another device such as a P.B. then it can just be in parallel with the other input, (OR'rd).
    If the other device is a Arduino, PC etc, other than a contact closure device (PB) , then you can just place a diode in each line from the Micro and one on the P.B conductor . the diode anode end (NON-striped end) on both inputs are connected to the opto inputs..
    You could wire it across the 2n5551 collector to emitter, but probably no need.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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    Default Re: Basic Questions about SainSmart Relay Module

    Al,

    Thanks..that may be the way to go too.

    Stuart

    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


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Basic Questions about SainSmart Relay Module
Basic Questions about SainSmart Relay Module