Wiring HELP Needed: Relay Wiring for ATO 2x Float Switch

[Sokretys]

The Float Switch

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0155.jpg

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0156.jpg

Power Supply for Tunze Metering Pump 5000.02 (6-12V needed 1200mah)

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0157.jpg

BUT!!! The switches are only rated for 500mah!

I ordered 2 relays that look like..

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0161.jpg

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0149.jpg

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0151.jpg

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0154.jpg

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0152.jpg

So if i have the two red wires in this picture hooked into the 11 and 12 spots the pump runs if that helps.

http://i256.photobucket.com/albums/hh165/Sokretys/IMAG0158.jpg

Im pretty sure I have everything i need to get this to work, im just reeally lacking the know how with this one. Any thoughts on how i could get this to work?

Thanks!

 

[johntan]

I will say you probably want to use A2 and A1 for your load, and 11 with 14 for your switch and DC power. 11 and 14 are NO meaning the normally do NOT supply power to your load unless the switch tells it to.

That being said look into an OMRON solid state relay. 7 bucks on ebay, and the difference is this: Electromechanical relays generally fail CLOSED and solid state relays fail OPEN. Meaning if your mech. relay fails due to having too high of milliamps pumped through it, odds are it will fail closed, and dump all of your top off into your tank. This qualifies as a bad day.
A solid state relay also has an LED to indicate if it is powering your load or not.

 

[Sokretys]

Sooo there is not a good reason not to be using OMRON solid state relays then? haha on it!

 

[Sokretys]

Think this one may do the trick?

http://www.ebay.com/itm/OMRON-G2RL-1A4-E-CF-12VDC-SOLID-STATE-RELAY-NNB-/360208111505?pt=LH_DefaultDomain_0&hash=item53de139791

 

[johntan]

I use these
http://www.ebay.com/itm/New-OMRON-S...856?pt=LH_DefaultDomain_0&hash=item564c575f20

 

[Sokretys]

I think where my ATO is getting complicated because of the pump i am using. The tunze metering pump is 5-12vdc @1200 mah. Ive tested it and it needs at least 7.5vdc to reach my tank (i dont have a sump). Id prefer not to run it at 12vdc to preserve the pump. In which case like you said John a solid state relay will be ideal for this.

I guess my confusion lies with what type of solid state to use. SPST, SPDT, DPDT etc? Again i want to use at least 2 switches. Bottom switch (on) top switch (off). Or even with a 3rd switch as a fail safe. Can i use a dpdt for 2 or 3 switches? There is a local electrical warehouse that has pretty much everything. So when i find out what switch to use i can jump on over there, grab it, and get this goin!

 

[Sokretys]

This one may work. But what are its limitations as SPST?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130679439448&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en

 

[johntan]

your PUMP is dc??? Oh god. You would need to build a controller and then I would guess use like a 2n2222 transistor to power that. Don't quote me on that, I have experience with the transistor powering DC though from my leds.

I think with that pump you are over engineering it. I use like a cheapie $10 AC pump, hooked up to the SSR, and then two float switches in series. That way both switches have to be in the same up or down position to verify the water level.

Having one switch turn the pump on and one switch to turn it off you would have to either A. make a controller again, or you are back to a double throw mechanical relay - spdt -(one relay starts as normally open, the other starts as normally closed?) again things start to get nutty.