turning power supply on and off

I have a 1120VAC buzzer that has failed.

the wiring system to it is all 120VAC, but now I want to use a 12VDC buzer.

What I would like to do is to use this

http://www.ebay.com/itm/261616737885

I would just connect this to the existing 120VAC and the output to the buzzer.

when the existing relays signaled the buzzer to go of, the 120VAC would go hot and the power supply would output 12VDC

anyone know if there would be a problem turning the mains on and off to this ?

dave-in-nj: anyone know if there would be a problem turning the mains on and off to this ?

Should be fine.

(I assume it doesn't turn on/off very often...)

Edit: I actually use that type of PSU in some of my house lights (connected to the light switch). They get switched on/off many times per day, I've had no problems so far...

Just use a 12V wall-pack, that ebay smps is total overkill.

http://www.pottersignal.com/security/newsview.php?subaction=showfull&id=1309201393&archive=&start_from=&ucat=4&

with strobe

[quote author=Runaway Pancake link=topic=271318.msg1912637#msg1912637 date=1412769410] Just use a 12V wall-pack, that ebay smps is total overkill. [/quote]

sorry, I missed the message.

wall pack = wall wart

I will be paying an electrician to install this. the wall pack would requite he supply a junction box (pull box) of 6x6 or so. then put in a switch box or handi box, install a receptacle, plug in the wall pack, then connect that to the horn.

using one of these power supplies will eliminate the extra box and receptacle. it does make it harder to connect 12ga solid wire to these tiny terminals.

the more recent designs are all 12v. we are retro fitting the old unit.