Overview
The Apollo 55000-001APO is an intelligent, loop‑powered open‑area sounder compatible with XP95 and Discovery addressable fire alarm systems. Supplied on an isolating 4" base (EN54‑17), the device offers selectable tones, two volume settings and integrated short‑circuit isolation for reliable operation in commercial and light industrial installations.

• Loop‑powered: no external PSU required
• Selectable tones: Apollo, Slow Whoop, DIN; synchronised tones supported
• Two volume levels: 92 dB(A) and 100 dB(A) selectable
• Integrated isolator: built‑in short‑circuit isolator on 4" isolating base (EN54‑17)
• Durable construction: polycarbonate housing, red, IP65 rated for exposed internal / semi‑protected external use
• Long warranty: 10‑year manufacturer warranty

Use cases
Ideal for open areas requiring addressable notification such as offices, retail, schools and light industrial sites. Suitable for both new installations and retrofits where XP95/Discovery systems are used.

Standards & compliance
Designed to meet relevant standards (EN54‑3 for sounders; base EN54‑17 for isolators). Installations should follow local regulations and relevant fire safety standards. Check manufacturer certificates for full approval listings (LPCB, VdS, CPR etc.).

Installation & safety
Installation must be carried out by a competent, qualified electrician or fire system technician. Observe wiring polarity (device is polarity sensitive) and refer to the official Apollo datasheet for tone‑by‑tone current consumption and detailed wiring instructions.