mcgeebc
Well-Known Member
I'm planning on building a simple control panel with PID to control a Brutus 20 system. I've seen many complicated systems posted on here with switchs, e-stops, multiple SSRs and the like. I'm wondering what I'm really missing by having a PID control one SSR.
I understand that when an SSR fails, it fails in the open position, so by having only one I risk having full power go to my element. I'm okay with that. If it happens, I'll just shut off the breaker. Since I'll have the spa panel nearby, I don't see a need for an E-stop or other switches.
I also don't plan on having any breakers or fuses in the panel. The GFI breaker in my spa panel and main breaker should protect me and the lines.
What am I missing?
Here is a crude mock-up. I know that the temp probe and wiring from PID to SSR is 2-wires, I was just trying to simplify the drawing.
I understand that when an SSR fails, it fails in the open position, so by having only one I risk having full power go to my element. I'm okay with that. If it happens, I'll just shut off the breaker. Since I'll have the spa panel nearby, I don't see a need for an E-stop or other switches.
I also don't plan on having any breakers or fuses in the panel. The GFI breaker in my spa panel and main breaker should protect me and the lines.
What am I missing?
Here is a crude mock-up. I know that the temp probe and wiring from PID to SSR is 2-wires, I was just trying to simplify the drawing.