System Sensor SS-24 Wall Mount Fire Alarm Horn Strobe 24VDC 800Hz UL Listed

System Sensor SS-24 Wall Mount Fire Alarm Horn Strobe 24VDC 800Hz UL Listed

The System Sensor SS-24 is a wall-mount combination fire alarm horn and strobe (visual signaling appliance) rated for 24 volts DC. It integrates an audible horn and a xenon strobe light into a single compact red enclosure, providing both audible and visible notification in a fire alarm system. UL listed as a fire protective visual signaling appliance (UL File 29S9), it is designed for use with standard 24V fire alarm control panels in indoor and outdoor applications.

Specifications & What's Included

• Manufacturer: System Sensor (a division of Pittway)
• Model: SS-24
• Voltage: 24VDC
• Current draw: 0.025 A (25 mA)
• Flash rate: 2.0–4 flashes per 3 seconds
• Flash energy: 1.0 min. candela
• Factory-selected tone: 800 Hz (tone selectable via clips)
• Mounting: wall mount with integral mounting flanges and screw holes
• Housing color: red with white strobe lens
• Conduit entry: threaded conduit fitting on side of housing
• UL listed: Fire Protective Visual Signaling Appliance, File 29S9
• Label reference: L00-777-01; installation reference: 155-496
• Rear terminal connections: IN/OUT wiring terminals, strobe-only and strobe w/strobe configurations
• Tone clips present; unused clips to be stored on clip storage post per factory label
• Unit only — no mounting hardware or installation instructions included

Applications

The SS-24 is a fire alarm notification appliance used in commercial and industrial fire alarm systems wired to a 24V FACP (fire alarm control panel). It serves as an audible-visible notifier — the horn sounds to alert occupants while the strobe provides a visual signal for those who may not hear the horn, as required by ADA and NFPA 72 notification appliance guidelines. System Sensor (now part of Carrier/UTC Fire & Security) produced the SS series as a widely-deployed line of horn-strobe units commonly found in offices, schools, warehouses, and light industrial facilities. The SS-24 is rated for both indoor and outdoor use, making it suitable for covered exterior locations. It connects in-line on a standard NAC (notification appliance circuit), and the tone-clip system allows the installer to select from multiple tones at the device. These units remain in active use as replacement or supplemental devices on legacy 24V conventional and addressable fire alarm systems.