MB Motor Bells

MB Motor Bells

  • High sound output for improved alerting capabilities
  • High efficiency, low current motor
  • Low starting voltage
  • Fully‑enclosed mechanism
  • Durable keyed steel gong and striker
  • Polarized for use on supervised circuits
  • Both 6 in. (15.2 cm) and 10 in. (25.4 cm) shell sizes in 12 VDC or 24 VDC models

These Wheelock motor bells use a high‑quality, micro‑motor operating mechanism. This provides longterm reliability, low starting voltage, and extremely low current consumption. These features enable the use of more bells per circuit and greater alarm signal distribution than conventional bells. The low starting voltage provides a stronger signal on marginal circuits. These motor bells eliminate the coils and contacts found in conventional vibratory bells. They contain a highly-efficient DC motor drive system to produce high sound pressure levels at lower current requirements. As a result, they reduce EMI generation problems. The operating mechanism is enclosed in a die-cast aluminum housing, making the bells suitable for both interior and exterior applications. The steel gong and striker last longer and produce a louder sound output.

   
Current (maximum) at 8 VDC to 17.5 VDC  
VDC: 90 mA
VFWR: 110 mA
Current (maximum) at 16 VDC to 33 VDC  
VDC: 40 mA
VFWR: 56 mA
   
Relative Humidity: Up to 85%
Temperature (Operating): -31°F to +151°F (-35°C to +66°C)
   
Color: High‑gloss, red enamel
Material: Base: die‑cast aluminum Gong: steel
   
Spherical: 92 dB at 10 ft. (3 m)