MX3660 with SainSmart Relay - Page 4

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Thread: MX3660 with SainSmart Relay

  1. #37
    Member JerryGarcia's Avatar
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    Default Re: MX3660 with SainSmart Relay

    Thanks!

    The main thing is that I have four distinct and switchable relays now, which is a huge improvement. I'm close to being functional again should I get the leakage worked out.

    Any guess on what quantity of resistance I would need to control the leakage should I attempt that?

    I can test with the SSR as a shunt this evening as well.



  2. #38
    Member john-100's Avatar
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    Default Re: MX3660 with SainSmart Relay

    whats you mains supply voltage ?

    120 V AC as in NA
    or
    230V AC as in Europe ( in my part of the UK my supply is over 240V AC)

    with a 240V supply you could try 68K ( 68000 ohms) 1 W

    John



  3. #39
    Member JerryGarcia's Avatar
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    Default Re: MX3660 with SainSmart Relay

    I’m in the US, so 110/120 AC.

    Edit: fat fingers, lazy proofing



  4. #40
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    Default Re: MX3660 with SainSmart Relay

    for a 120 V AC supply you can use a 15 K (15000 ohm ) 1W resistor to test
    for long term use use a 2W resistor

    120/15000 = 8 mA

    120V x 8 mA = 0.96 W



    for 140V supply use a 22 K resistor

    140 / 22000 = 0.006 mA

    140V x 0.006 mA = 0.89 W

    use a 2W resistor

    John



  5. #41
    Member JerryGarcia's Avatar
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    Default Re: MX3660 with SainSmart Relay

    14k if my math is right?



  6. #42
    Member JerryGarcia's Avatar
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    Default Re: MX3660 with SainSmart Relay

    Okay, 2w it is.



  7. #43
    Member JerryGarcia's Avatar
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    Default Re: MX3660 with SainSmart Relay

    I soldered up a 15k resistor with a bunch of 2.8k and 3.5k resistors (not sure wattage). I connected it across 1 & 2 on the SSR. Same result.

    I measure dthe voltage from the "off" side of the SSR load side, I get 72v when off. I see 120v when on. This is consistent on two different Fotek SSR's

    I have V+ across 1&2 on the Fotek unit, I think I am going to chanage that to V-. I am also going to test SSR state on/off manually, sans the MX3660. Perhaps this will show the switching of the MX3660 to be the issue.



  8. #44
    Member JerryGarcia's Avatar
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    Default Re: MX3660 with SainSmart Relay

    Well, no luck with those tests. Same results. It also seems my fan blew after leaving it run on 70v for a half hour, it won't run on any outlet.

    It seems these SSRs are leaking like 70v when off. That seems way high to me. Nothing is making sense at this point. Maybe I should check to see that I am getting 5v successfully across the inputs. The LED on the SSR correctly turns on and off though, so that should be good.





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