These units enhance the Main functionalities in the fire alarm procedure. Such as, Doorway Holders are electromagnetic devices that maintain fire doors open to facilitate movement. Two- or four-way circuits hook up initiating gadgets to the fire alarm system’s control panel. The user interface goes into an alarm point out https://fire-alarm-systems58901.blogdeazar.com/35510696/5-tips-about-fire-alarm-systems-you-can-use-today