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Sonoff 4CH Pro R3 - irrigation control, 24V solenoid valves, Zamela TRM-24 transformer

auxen99 2535 4
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  • #1 20538191
    auxen99
    Level 2  
    Good afternoon, I have a huge request for advice. I want to connect the 24V solenoid valves controlling the irrigation to the sonoff 4ch3 pro r3 controller I recently purchased. Quite a few people have commented that it is a very cool solution. A problem arose today when I received my sonoff, namely that the version that passes at least according to the manual supports 9-23V. I have already purchased a 230V/24V transformer from Zamela TRM-24 and my question, as a total layman, is whether my sonoff can still be supplied with 24V and whether the solenoid valves will then work properly or whether I should return this version and look for an older one that was for 24V. Thank you kindly for your help in advance.
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  • #2 20538328
    raks0
    Level 30  
    This Sonoff can be supplied with 9-23 DC and the TRM-24 transformer gives 24V AC.
    So you will still have to rectify this current and, in doing so, you can also reduce the voltage to that required by the controller's instructions. Do the solenoid valves understand AC?
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  • #3 20538383
    auxen99
    Level 2  
    Yes, the electro-valves are under AC. Where I found a schematic on the web and tried to draw it on my example. Can someone verify the correctness? And do I have to reduce the voltage in some way in this case? Sonoff 4CH Pro R3 - irrigation control, 24V solenoid valves, Zamela TRM-24 transformer .
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  • #4 20538393
    raks0
    Level 30  
    You don't need to reduce anything, the controller there is powered from 230V AC.
    It should work as long as the transformer can cope with 4 solenoid valves, it only has 15VA power.
  • #5 20538473
    auxen99
    Level 2  
    Thank you for your reply. The solenoid valves will be opened one at a time, so there won't be more than one running at the same time, so I hope it will hold :) Thanks again. Best regards
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