MeuserReef
Welcome to the next level
<a href=showthread.php?s=&postid=12329131#post12329131 target=_blank>Originally posted</a> by chrismunn
haha, no it actually makes alot of sense! thanks for taking the ttime to explain it to me.
so there is always power coming from the 12v supply going to #8, but power from the 12v wont reach #7 untill the float switch is activated right?
at that point it closes the relay switch and allows the 120v ac coming from the wall to pass through the relay, and power up the dosing pump, all without blowing up the what,.... float switch or 12v power supply?
The 12V and the 120V never come in contact with each other so there is no worry about the 120 blowing anything up. The DPDT relays are actually 2 switches wired to the same control circuit (one switch consists of pins 1, 2, & 3 and the other consists of pins 4, 5, & 6). You could wire 2 pumps, one to each side, so that they both come on when the floats activate the 12V circuit. You could also wire one side so that its ON (using the Normally Closed contacts) when the float switch is not activated, while having the other side wired so that its OFF (using the Normally Open contacts) when the float switch is not activated (and vice-versa).
This is the basic operation of all relays. A low(er) voltage control circuit controlling a high(er) voltage device.