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Automation, sensing and robotics • Re: Trying to Control JF-0530B 12V Solenoid with RPI3B and 12V Modbus Relay Module over RS485

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Thanks for the response.
There's no audible click and the associated LED on the Relay board doesn't light up so the signal can't be getting there.
There is a Register Switch - I've tried multiple positions. When I use the incorrect position then python script returns an error that it can't find the board so I must have it set correctly.
I'll try the Diode
Also, your schematic only shows one Relay lead connected the the realy - the second is directly to Vcc? Is this intentional?

Statistics: Posted by KevinSRussell — Thu Jun 26, 2025 10:09 am



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