D263TH Two+Wire Smoke/Heat Detector Two+wire photoelectric smoke detector with a 135°F (57°C) heat sensor.
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 to reduce dust accumulation and nuisance alarms.
12 V or 24 V input
Designed for commercial or residential use
Two-wire application
Light-emitting diodes (LEDs) indicate the status of the chamber, power, and alarm
Removable terminal block to simplify wiring connections
D263TH 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.
Use a D132B Reversing Relay Module to activate the sounder (85 dB at 10 ft [3 m]). When using a D132B, the LED does not latch on alarm.
D263TH Chamber Calibration
Tests Check the sensitivity and calibration of any of these detectors using a visual check, a magn(more...)
