Krypt0Deadbeef t1_iu2wvf6 wrote on October 28, 2022 at 3:47 AM

Reply to comment by ionized_fallout in How to wire a 8 pin relay, 2 float switches and a solenoid with 2 power supplies by ionized_fallout

The 2-wire floats, are they Normally Open?

ionized_fallout OP t1_iu2z2zd wrote on October 28, 2022 at 4:08 AM

they can be either/or. by default they are NC.

Krypt0Deadbeef t1_iu31fac wrote on October 28, 2022 at 4:32 AM

PM sent with labeled drawing and terminals to wire.

Krypt0Deadbeef t1_iu326lm wrote on October 28, 2022 at 4:40 AM

When the Low Float rises, CR1 turns on to indicate Not Low. On the 5V section, the circuit is activated if the NC contact of CR1 is true (Not-Not Low, which means Low) and the High Float is Not High (needs to be NC) then the solenoid is powered along with CR2. The Low is sealed in by the CR2 contact so that when the tank starts to fill and the Low Float causes CR1 to change state, the valve stays open. Once the High Float activates, it opens the circuit, closing the valve and removing the CR2 latch.