I am attempting to build an Arduino controlled brewing setup, using a Raspberry Pi to send serial commands to active a relay, which in turn fires the contactors for my 5400W electric heater elements.
The problem exists when I command any subsequent relay, it activates, but the voltage is not passed to the contactor, and it does not fire. I have a 24V 2A power supply attached with both phases on the terminal bus.
I’m confident the issue is how I have the power distributed, and that the circuit when closed is the shortest path, and the current does not follow to the remaining contactors when activated following the initial contactors activation.
When firing off the any single relay, which closes the any one contactor, it works great. (Doing it via wifi :D)
I want to be able to command all my contactors to close individually, and simultaneously.
PICTURES ARE ATTACHED