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Bosch D275 Power Supervision Module Bosch D285DH Duct Photoelectric Smoke Head
D275 Power Supervision Module

The D285 and D285TH detector heads detect the large smoke particles which typically result from wood, paper, and fabric combustion. The D285TH smoke detector also has a +135°F (+57°C) fixed temperature heat sensor. Use in areas where the ambient temperature does not exceed +100°F (+38°C). These detectors are compatible with two­wire or four­wire, 12 VDC or 24 VDC circuits. Also available are addressable bases for use on the POPEX bus.

  • Modular design
  • Commercial or residential applications
  • Two­-wire or four­-wire application, depending on base
  • Chamber Check rapid-flash LED sends contaminated chamber reports
  • Flashing LED power indicator
  • Steady-­on LED alarm indicator
  • Bosch D285TH Photoelectric Smoke Head with Fixed-Temperature Bosch D306 Remote Indicator Plate
    REPLACES DS-DS250TH

    The D285 and D285TH detector heads detect the large smoke particles which typically result from wood, paper, and fabric combustion. The D285TH smoke detector also has a +135°F (+57°C) fixed temperature heat sensor. Use in areas where the ambient temperature does not exceed +100°F (+38°C). These detectors are compatible with two­wire or four­wire, 12 VDC or 24 VDC circuits. Also available are addressable bases for use on the POPEX bus.

  • Modular design
  • Commercial or residential applications
  • Two­-wire or four­-wire application, depending on base
  • Chamber Check rapid-flash LED sends contaminated chamber reports
  • Flashing LED power indicator
  • Steady-­on LED alarm indicator
  • Use the D306 Remote Indicator Plate with the D296/D297 Long­Range Beam Smoke Detectors and the D340 Series Duct Smoke Detector Housings. This plate has LEDs to indicate the detector's status and test points to read the sensitivity voltage.
  • Highly­visible LED indicators
  • Sensitivity voltage test point
  • Easy to mount and wire
  • Attractive faceplate
  • Bosch D307 Remote Test and Indicator Plate Bosch D308 Field Test Kit for D296/D297
    REPLACES DS-DIS240

    Use the D307 Remote Test and Indicator Plate with the D296/D297 Long-Range Beam Smoke Detectors and the D340 Series Duct Smoke Detector Housings. This plate has LEDs to indicate the detector's status, test points to read the signal voltage, and a key­operated test switch to test or reset the detector.

  • Highly-visible LED indicators
  • Sensitivity voltage test point
  • Key­-operated remote test and reset switch
  • Easy to mount and wire
  • Includes four blocking screens and holder device for testing projected beam smoke detectors

    REPLACES DS-TK240

    Bosch D309 Alignment Strobe for D296/D297 Bosch D263 Two-wire Photoelectric Smoke Detector
    REPLACES DS-AL240

    Installation accessory tool for ensuring proper alignment of transmitter and receiver ends of projected beam smoke detectors

    REPLACES DS-DS282

    Each of the D263 Series Detector models is UL Listed and works with commercial fire protective signaling and household fire warning systems. Each model detects smoke particles produced during wood, paper, and fabric combustion. 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.

  • 12 V or 24 V input
  • Designed for commercial or residential use
  • 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
  • Bosch D263TH Two-wire Photoelectric Smoke Detector with 135°F (57°C) heat sensor Bosch D263THC Two-wire Photoelectric Smoke Detector with 135°F (57°C) heat sensor and auxiliary relay
    REPLACES DS-DS282TH

    Each of the D263 Series Detector models is UL Listed and works with commercial fire protective signaling and household fire warning systems. Each model detects smoke particles produced during wood, paper, and fabric combustion. 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.

  • 12 V or 24 V input
  • Designed for commercial or residential use
  • 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
  • REPLACES DS-DS282THC

    Each of the D263 Series Detector models is UL Listed and works with commercial fire protective signaling and household fire warning systems. Each model detects smoke particles produced during wood, paper, and fabric combustion. 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.

  • 12 V or 24 V input
  • Designed for commercial or residential use
  • 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
  • Bosch D273 Four-Wire Photoelectric Smoke Detector Bosch D273ES Four-Wire Smoke Detector with EOL Relay and Sounder
    REPLACES DS-DS284

    Each of the D273 Series Detector models is UL Listed and works with commercial fire protective signaling and household fire warning systems. Each model detects smoke particles produced during wood, paper, and fabric combustion. The D273 Series 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 reduce dust accumulation, deter insects, and reduce nuisance alarms.

  • 12 VDC or 24 VDC input
  • Designed for commercial or residential use; Four-wire applications
  • 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
  • REPLACES DS-DS284ES

    Each of the D273 Series Detector models is UL Listed and works with commercial fire protective signaling and household fire warning systems. Each model detects smoke particles produced during wood, paper, and fabric combustion. The D273 Series 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 reduce dust accumulation, deter insects, and reduce nuisance alarms.

  • 12 VDC or 24 VDC input
  • Designed for commercial or residential use; Four-wire applications
  • 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
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