The D900-RPS-SG Series provides two style Y or Z conventional Notification Appliance Circuit (NAC) rated for a total of 5 Amps. The 24 VDC (0.5 A) auxiliary power and the resettable 24 VDC (0.32 A) auxiliary power outputs provide for system application flexibility. Other benefits include - 1) an intelligent 2 wire interface residing on the DigiComm^TM analog addressable loop with the capability of returning all power supply trouble statuses along with NAC circuit activation indication, for factual point annunciation 2) an AC power failure trouble time delay per NFPA72. 3) Remote trouble diagnostic identification of fault conditions. The D900-RPS-SG is capable of synchronized horn (temporal) and strobe operation directly from the NAC outputs without the need of a synchronization module. This provides horn (temporal) and strobe synchronization with independent control (alarm silence capability) on the same pair of wires.