System Sensor APA151 Remote Annunciator with Piezo Alert
Overview
The APA151 is a 24VDC remote annunciator module with integrated piezo sounder, designed to extend audible notification capability to secondary locations in fire alarm systems. At 14.38 inches long, 5 inches wide, and 2.5 inches deep, it fits control rooms, corridors, or remote monitoring stations where distributed alert points improve occupant notification. Mount it on a wall or in an enclosure to add notification redundancy without running signal lines back to the main panel — the piezo handles local audible output while the supervised circuit monitors system health.
Compatibility
The APA151 integrates with fire alarm control panels and networked systems that supply 24VDC supervised signaling. It is compatible with multi-zone and interconnected fire detection architectures where remote annunciation enhances coverage. Verify your control panel supports supervised 24VDC annunciator outputs before specification — not all systems expose annunciator circuits. System Sensor fire alarm control panels and compatible third-party panels with 24VDC supervised outputs are supported.
Installation Notes
Operates on 24VDC supervised power — ensure your control panel can supply this voltage continuously and has supervisory circuit capability to detect opens or shorts on the annunciator wiring run. The compact form factor allows flush or surface mounting in standard electrical boxes or control room enclosures. Wiring to the panel is standard two-conductor (positive and negative) with supervision feedback. Environmental operating limits are 32°F to 120°F and 0% to 95% non-condensing humidity — avoid wet locations or direct spray without additional enclosure protection.
