Faraday (Siemens) MH-R

The Faraday (Siemens) MH-R is a compact red mini-horn notification appliance designed for fire alarm systems where space constraints or aesthetic considerations require a smaller audible signal device. Operating at 12/24 volts, this wall-mounted piezoelectric horn delivers 80 decibels of output with selectable high/low volume and temporal/continuous tone modes, making it ideal for residential, hospitality, and commercial installations requiring discrete yet effective audio notification.

Key Features

• Compact red mini-horn notification appliance for space-constrained installations
• 12/24 volt DC operation from regulated power supply or full-wave rectified unfiltered supply
• 80 decibel audible output with dual volume settings (high and low)
• Temporal and continuous (non-temporal) tone mode selection for system compatibility
• Wall-mountable to single gang back boxes for seamless aesthetic integration
• MDL sync module compatible for synchronized fire alarm notification

Technical Specifications

• Product Type: Compact piezoelectric mini-horn notification appliance
• Operating Voltage: 12 or 24 volts regulated DC, or full-wave rectified unfiltered supply
• Sound Output: 80 decibels at rated voltage
• Tone Options: Temporal (Code 3, 4, or cadence) and continuous modes
• Volume Settings: High and low selectable options
• Physical Dimensions: 4.6" L x 2.9" W x 0.45" D (117 mm x 74 mm x 11.5 mm)
• Housing Color: Red (white also available)
• Temperature Range: 32°F to 120°F (0°C to 49°C)
• Humidity: 10 to 93% non-condensing, indoor use only
• Wiring: 12 to 18 AWG compatible
• Compatibility: MDL synchronization module compatible; mechanical compatibility with PA400 series Mini-Alert sounders

Certifications

• Listed to Underwriter's Laboratories Standard UL 464 for fire protective signaling systems