First time posting here :) Hope someone can help.
I have a wireless Yale home alarm system and the external siren is chewing through batteries in no time and is expensive to keep replacing them. I came to the conclusion that if I were to run it of a DC mains power adapter it would be hell of a lot cheaper to run. The external siren uses 4 x D cell batteries (1.5v each) The batteries are in series so this is 6v. With the batteries in series, I used a multimeter to check how much amps/current it is using when the siren is activated. It seems to be consuming about 450 ma when the siren is fully activated and consuming up to 220 ma in standby mode with just its warning LEDs flashing intermittently every 5 seconds.
I had a 6v DC 3500ma mains adapter lying about so thought this would be perfect to power it as it will only draw 450 out of the 3500 milliamps that the adapter supplies and should be sufficient enough. I hardwired the adapter to the black and red terminals on the siren and made sure the polarity is correct. When powered up, the siren seems to be getting some sort of power as it may make 1 beep or the leds might flash once on power up, but that is all. If I do a siren system test with the batteries inserted, it works perfectly with a continuous siren alarm and flashing LEDs. If I do a siren system when connected to the DC power adapter, the LEDs don’t flash but the siren will only let out one burst of sound for like a second. Like one loud squelch and that’s it. I’m totally confused why it won’t work on DC mains power when the voltage and the current output of the adapter seem to be similar to the battery power. Any ideas or feedback are welcome folks! Many thanks in advance :)
Please see YouTube link below to the Yale Siren I’m using: