Bosch FPD-7024 Fire Alarm Control Panels (FACPs) can be used in commercial and public building applications such as schools, universities, manufacturing plants, and health care facilities. The FPD+7024 FACPs support four on+board initiating zones that can be expanded to eight using the FPC-7034. Each initiating zone supports two+wire and four+wire detectors configurable as Class A , Style D or Class B, Style B loops. Each zone can support up to 20 two+wire detectors, or any number of four+wire detectors depending on available power.