pauly2021

Hey, I hope some of you can help me with some advice about buying a fire alarm setup. I wonder if someone could take the time to describe to me the various types of fire alarm systems and how they work. As I understand it there are 3 types and already researched the addressable fire alarm system. I was a novice in this case, but this page helped me a lot even though it is some brand's product page! So I would like to know about 2 wire and 4 wire fire alarm systems. As I read, an addressable fire alarm system has a run of 2 cores from the panel to all the sounders/strobes & another 2 cores which runs out, links by all the detectors and comes back to the panel in like a ring, but what about the other set of terminals? Any information would be great. Thanks.