I am looking for a way to put freeze protection on my new variable speed control pool pump. The pump has a connection, where it provides 5 vdc, and looks for a completed circuit any of the input wires. So basically, I just need a switch that is triggered at a temperature near freezing.
I am looking at this temperature controller from Amazon.
https://www.amazon.com/Inkbird-All-...&pd_rd_r=b57e0bfc-d340-4727-9e27-f8e487c61648
My question is, if the controller uses a 120 VAC supply, do the relays need 120 VAC to operate?
If I wire 120 VAC to the power input only, and wire the 5vdc circuit from the pump to the relay, will the relay close when triggered by the temperature?
I guess the simplified question is, if I wire 120 VAC to the input only, will the relays open and close with nothing attached to the pins.
I am looking at this temperature controller from Amazon.
https://www.amazon.com/Inkbird-All-...&pd_rd_r=b57e0bfc-d340-4727-9e27-f8e487c61648
My question is, if the controller uses a 120 VAC supply, do the relays need 120 VAC to operate?
If I wire 120 VAC to the power input only, and wire the 5vdc circuit from the pump to the relay, will the relay close when triggered by the temperature?
I guess the simplified question is, if I wire 120 VAC to the input only, will the relays open and close with nothing attached to the pins.