Apollo 45681-277APO

The Apollo 45681-277APO is an XP95 integrated base sounder with built-in isolator designed for loop-powered fire alarm installations on Discovery or XP95 systems. The base combines detector mounting, dual-tone audible alarm function, and automatic fault isolation in a single polycarbonate housing, supporting individual or group addressing with unique acoustic self-test capabilities.

Key Features

• Integrated base sounder with built-in isolator module
• Loop-powered operation: 17–28V DC, no external power supply required
• Dual-tone selection with two volume levels: 55-75dB(A) and 75-91dB(A)
• Individual and group addressing using XPert7 protocol
• Unique acoustic self-test function for system verification
• Built-in isolator prevents branch line faults from affecting the loop
• Polycarbonate housing with stainless steel contact terminals
• Accepts solid or stranded cables up to 2.5mm² cross-section

Technical Specifications

• Operating Voltage: 17–28V DC, polarity-sensitive
• Power Supply: Loop-powered (no external supply required)
• Alarm Output: Two tone options with dual volume ranges
• Sound Levels: 55-75dB(A) or 75-91dB(A) selectable
• Addressing: XPert7 individual and group addressing
• Housing: Moulded polycarbonate with stainless steel contacts
• Dimensions: 115mm diameter x 38mm height
• Cable Termination: Accepts solid or stranded conductors up to 2.5mm²
• Isolation: Built-in isolator on the mounting base

Certifications

• EN 54-3 compliant for alarm sounder performance
• XP95 Discovery series compatible
• 10-year manufacturer warranty