any Ya' Old Salts still here?

[T Man]

Is there a way that I can have my battery back up air pumps come on ONLY if there is a power outage? Some sort of solenoid switch? wired to the switches on the battery pumps? and when the power comes back on, the pumps shut off. Any thoughts? TinMan

[GreshamH]

Use a NC relay (normally closed). When the power is off, the relay will allow power to go thru it. Use a relay that can handle both AC (for the coil) and DC for the control.

[T Man]

Thanks Gresham. I will do that. TinMan

[easttn]

Alright Mr. G, I want pics and progress on the original thread. :D I've just installed a system with 2-226's and 10 RTD modules all daisy chained... to bad its not on a NaClH2O$sump. :(

Just red-neckin, shoot a post.

Tinman - GH is right on, AC on the coil and DC on the contacts.