Comment on Wyze says camera breach let 13,000 customers briefly see into other people’s homes
TimeSquirrel@kbin.social 4 months agoUsually, if a building has electronic access control, it's a requirement that the main controller or power supply be directly tied into the fire alarm with a hardwired trigger relay to drop power to all the door locks during an alarm. It may all be controllable and configurable on the cloud, but commercial equipment still has traditional redundancies like standby batteries and the like.
GolfNovemberUniform@lemmy.ml 4 months ago
What if there’s a gas explosion or another case that causes loss of connection between the system and the doors? Is it possible to open them manually in such cases?
TimeSquirrel@kbin.social 4 months ago
If the door has no means of mechanical egress, for example, a maglock, then it is required to have a second form of egress that cuts power to the maglock, such as a normally-closed exit button.
lemann@lemmy.dbzer0.com 4 months ago
Not the commenter you replied to, but these kinds of systems are usually “fail open”: if there is unexpected loss of power, all applicable doors are released/unlocked.
Some more complex systems will have specific doors automatically shut in the event of a fire to try and keep it contained, depending on local regulations