The D7024 is a fully integrated FACP that provides four zones and is capable of supporting both two-wire and four-wire detectors. Each zone can support up to 20 two-wire detectors, or any number of four-wire detectors (depending on available power). Two Notification Appliance Circuits (NAC) provides up to 4 amps of 24-volt power to operate horns, strobes, bells, and other notification appliances. Each NAC can be programmed to provide the Wheelock Synchronized Output.