D273 Photoelectric Smoke and Smoke and Heat Detectors

D273 Photoelectric Smoke and Smoke and Heat Detectors

  • 12 VDC or 24 VDC input
  • Designed for commercial or residential use
  • Four-wire application
  • Light-emitting diodes (LEDs) indicate the status of the chamber, power, and alarm
  • Removable terminal block to simplify wiring connections
  • Cable connection point for voltmeter sensitivity test
  • Trim Plate TP280 for retrofit and remodeling purposes

These detector models use an infrared (IR) LED light source and a silicon photodiode to measure light in a chamber. A fine screen covers the chamber to deter insects and reduce dust accumulation and nuisance alarms. During a fire, smoke particles reflect light onto the photodiode. When the photodiode measurements exceed the alarm threshold, the detector signals an alarm condition. After the alarm condition clears, interrupt power at the control panel to reset the detector.

   
Relative Humidity: Up to 93%, non-condensing
Operating and StorageTemperature: +32°F to +120°F (0°C to +40°C)
Radio FrequencyInterference (RFI)Immunity No alarm or setup on critical frequencies in the range of 26 MHz to 950 MHz.
   
Dimensions (Diameter x H): 5 in. x 2 in. (12.7 cm x 5.1 cm)
Material: High impact, fire retardant ABS plastic
   
Power-up Time: 22 sec maximum
RMS Ripple: 25% of DC input maximum
Voltage (stand-by): 10 VDC to 30 VDC
Current Draw (alarm) at 30 VDC  
D273, D273TH: 18 mA maximum
D273THC:  33 mA maximum
D273THE, D273THR:  36 mA maximum
D273THS:  78 mA maximum
D273THCS:  90 mA maximum
D273THES: 96 mA maximum
D273IS:  100 mA maximum
Current Draw (standby)  
D273, D273TH, D27THC, D273THCS, D273THS: 0.1 mA maximum
D273IS: 15 mA
D273THE, D273THES: 15 mA
D273THR: 18 mA maximum