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D296 | BOSCH SECURITY SYSTEMS

BOSCH SECURITY SYSTEMS | D296 | 24 V projected beam smoke detector

  • Réf. fabricant D296
  • PART #274265
Color: WHITE
Device Type: SMOKE DETECTOR
Mount: SURFACE
Power: 12 OR 24 VDC
Property: PROJECTED BEAM
Range: 300 FEET
UL Listed: UL LISTED
Description

Each D296 or D297 Projected Beam Smoke Detector consists of a transmitter, a receiver and a remote annunciation plate. The transmitter emits a pulsed infrared beam. The receiver measures the frequency and intensity of the beam over a period of time and compares this data with a trouble and alarm thresholds. The alarm threshold is field-selectable through a switch on the receiver to one of six levels of sensitivity. The trouble threshold is preset. If the receiver senses a signal strength below the preset alarm threshold in excess of the alarm period it signals an alarm. The receiver automatically compensates for the gradual loss of signal due to dust/dirt buildup on the cover. When 50 percent of the signal is lost, the receiver will indicate trouble. When the dust/dirt buildup is cleaned or the blockage is removed, the detector automatically resets. If the signal falls below the trouble threshold (approximately 3 percent) for more than 20 seconds, as might happen if an object blocked the beam, the receiver signals a trouble condition.

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Caractéristiques
  • 12 or 24 V models
  • Operates over distances between 30 ft. (9 m) and 350 ft. (107 m)
  • Six levels of switch-selectable sensitivity
  • Built-in alignment sights
  • Automatic range adjustment
  • Automatic signal synchronization
  • Automatic contamination adjustment
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