Galaxy G3-520 & AG8 power issues

[slip.cougan]

While working on my Galaxy panel recently I had to cut the power & disconnect the battery as I was adding in some new keypads.
Before cutting power I spared out the AG8 bell in the Engineering Menu>Outputs menu. Verified the alarm did not sound by triggering an intrusion (Part set then open the front door) and the AG8 did not sound. I had not spared out the strobe and this was flashing as I expected.

Thinking everything was OK I killed the power and of course the AG8 sounded. Now those things are loud and I had to wait for the Galaxy to boot up after re-applying power to reset it.

The only way I seem to be able to stop the AG8 from sounding is to disconnect the internal battery jumper before killing the power.

Now I thought that by sparing out the Bell this would stop the AG8 from sounding.
Is this normal?

Thanks

 

[GalaxyGuy]

It's normal. The sounder requires 12v for hold off, or it will power the siren from battery for ~15 mins.

 

[slip.cougan]

Thanks GalaxyGuy.
Good to know.