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Fire Alarm Systems I D285 Series Photoelectric Smoke Detector Heads (12/24 VDC). •
RECEIVED BoscH
• f (4 7 - 7_ 00 Lo I DEC 19 2001 Invented for life
CITY OF TIGARD
D285 Series Photo S gtnoke Detector
Heads (12/24 VDC)
_
• Commercial or residential applications
• 1 • Two-wire or four-wire application, depending on base
• Chamber Check' rapid -flash LED sends contaminated
• r " chamber reports
II . I � ► Flashing LED power indicator
•
• Steady -On LED alarm indicator
' • • p 1 • Modular design
•
The D285 and D285TH detector heads detect the large • D293S Four -wire Detector Base (6 in. [15.2 cm]
smoke particles which typically result from wood, paper, diameter) with Sounder
and fabric combustion. The D285TH smoke detector • D298M 24 V Four -wire Addressable (POPIT) Master
•
also has a +135 °F ( +57 °C) fixed temperature heat Detector Base (6 in. [15.2 cm] diameter)
sensor. Use in areas where the ambient temperature • D298S 24 V Four -wire Addressable (POPIT) Slave
does not exceed +100 °F ( +38 °C). These detectors are Detector Base (6 in. [15.2 cm] diameter)
compatible with two -wire or four -wire, 12 VDC or
24 VDC circuits. Also available are addressable bases for
use on the POPEX bus. Functions
These detectors have two components: the detector Detection chamber operation
base and the detector head. The base is permanently
attached and wired to a back box. The interchangeable The D285 and D285TH smoke detectors use an infrared
heads quickly detach for replacement and cleaning (IR) LED light source and a silicon photodiode to
without affecting circuit wiring. The D285 and D285TH measure light in a chamber. In normal conditions the
detector heads attach to the following detector bases: light is absorbed in the chamber. The presence of a
• D278S 12 V Four -wire Addressable (POPIT) Detector significant number of particulates allows the light to
Base (6 in. [15.2 cm] diameter) reflect to the photodiode. After three consecutive
• D287 Two -wire Detector Base (5.5 in. [14 cm] measurements exceeding the threshold level, the unit
diameter) signals an alarm condition. The detector can be reset
• D288 Two -wire Detector Base ([6 in. [15.2 cm] from the control panel, after an alarm condition is
diameter) cleared, by interrupting power.
• D292 Four -wire Detector Base (6 in. [15.2 cm] The detection chamber, designed for reliable smoke
diameter) entry characteristics, is protected by a micro-fine insect
• D293A Four -wire Detector Base (6 in [15.2 cm] screen to reduce dust accumulation and insect
diameter) with Form C Relay penetration and minimize nuisance alarms.
• D293E Power Supervision Detector Base (6 in.
[15.2 cm] diameter) with Auxiliary Form A Relay
www.boschsecurity.com
2 1 D285 Series Photoelectric Smoke Detector Heads (12/24 VDC)
Chamber Check' Feature detector base installs over a back box and contains all
To further reduce nuisance alarms, the D285 and the wiring. The detector head attaches to the base by
D285TH heads check their calibration. This Chamber aligning the head with the base and turning it clockwise.
Check feature is automatic. If the head is out of No tools are required for installation other than the hex
calibration for a period exceeding 24 hours, the Trouble- key used to tighten the optional tamper screw.
Alarm LED flashes once per second, three times the
normal rate.
Wiring
The terminal block accepts up to 12 AWG (2.3 mm) wire.
Testing
Internal diagnostic test
These heads have moisture -proof reed switches that
react to an external magnet for testing. The magnet test
simulates a 4% to 6% smoke obscuration that places the
detector in an alarm condition. This test results in
specific LED and alarm circuit responses to indicate:
• Detector within calibration standards
• Detector settings outside sensitivity standards
• Detector not operational
This test is especially useful in environmentally unstable
or unclean areas.
Sensitivity voltage test
These detector heads have a socket that accepts the
D1005 Test Cable. The D1005 connects to the detector
head and allows a voltmeter to read the sensitivity of the
device.
LEDs
The D285 and D285TH have a built -in LED that flashes
to indicate the device is powered. The LED latches on
steady in an alarm condition.
Certifications and Approvals
Listings and UL UROX: Smoke - Automatic Fire Detectors (UL268)
Approvals:
UL UROX7: Smoke - Automatic Fire Detectors certified for
Canada (ULC529)
c -UL -us
CSFM: 7272 -1615: 134 •
NYC /MEA (274 -93 -E, Vol. VII)
Complies with: Hong Kong Fire Services Department (HKFSD)
Installation /Configuration Notes
Note Smoke detectors are intended for detection
circuits that protect people. Heat detectors
are appropriate for circuits that protect
property.
Mounting
The D285 smoke detector head and D285TH smoke and
heat detector head are parts of a compound device. The
D285 Series Photoelectric Smoke Detector Heads (12/24 VDC) 13
Technical Specifications
Environmental Considerations
Radio Frequency No alarm or setup on critical frequencies in the
Interference (RFI) range from 26 MHz to 950 MHz at field
• Immunity: strengths less than 50 V/m
Relative Humidity: Up to 93 %. non - condensing
Temperature (operating): +32 ° F to + 100 °F (0 ° C to +38 °C)
Mechanical Properties
Color: Bone white
Dimensions (diameter x D): 4 in. x 1.25 in. (10.2 cm x 3.2 cm)
Power Requirements
Current Two -wire: depends on control panel that must limit the alarm
(alarm): current to 100 mA maximum
Four -wire: depends on detector base; refer to pertinent base
specifications
Current (stand- Two -wire: 0.08 mA at 12 VDC; 0.09 mA at 24 VDC
by): Four -wire (D293E): 4 mA at 12 VDC or 24 VDC
RMS Ripple 25% of DC input
(maximum):
Voltage (input): Two -wire: 8.5 VDC to 33 VDC
Four- wire: 1OVDC to 30 VDC
Trademarks
Chamber Check' is a registered trademark of Bosch Security Systems in the
United States.
Ordering Information
D285 Photoelectric Smoke Head D285
D285TH Photoelectric Smoke Head with Fixed -Tern- D285TH
perature 1135°F (57 °C)] Heat Sensor
Hardware Accessories
D1005 Test Cable 01005
DT -2 Detector Removal Tool DT -2
D275 Power Supervision Module D275
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Fire Alarm Systems I D278S Four -wire Addressable Detector Base (12 VDC)
0 BOSCH
Invented for life
D278S Four -wire Addressable Detector Base
(12 VDC)
• Low-profile modular design
• Addressable application
4 • Data In and Data Out terminals
• Easy head removal for cleaning and servicing
I .
Use the D278S Four -wire Addressable Detector Base Installation /Configuration Notes
with smoke and heat detector heads to provide early
warning fire detection for life safety and property Compatible Products
protection systems. The D2785 is a 12 VDC base for use The following products are compatible with the D278S
in systems controlled by a D7412G or D9412G 12 VDC
Four -wire Addressable Detector Base:
Control Panels with a D8125 POPEX Module. The D278S
has a built -in POPIT to provide individual addresses on Category Product ID Product Description
the FACP data expansion circuit. Control Panels D7412G Addressable control panel - -
The D278S accepts the D285/D285TH Photoelectric D9412G Addressable control panel
Smoke Detector Heads, the D286 Ionization Smoke DetectorHeads D285 Photoelectric smoke detector head
Detector Head, and the D603, D604, and D605 Heat D285TH Photoelectric smoke detector head with
Detector Heads. When used with the D285 Series fixed temperature ( +135 °F ( +57 °C])
detector heads, the D278S indicates Chamber Check® heat sensor
trouble to the control panel through the POPIT bus. The D286 Ionization smoke detector
Chamber Check trouble indication appears on the D603 Rate - of - Rise heat detector
keypads as a fire trouble. D604 Fixed-temperature (+135°F 1+57°C])
heat detector
Certifications and Approvals 0605 Fixed-temperature (+190°F (+88°C])
heat detector
Listings and UL UROX: Smoke - Automatic Fire Detectors (UL268) Mounting
Approvals: UL UROX7: Automatic Fire Detector s certified lot Canada The D278S base mounts on a single - gang switch box or
(ULC529) b b
c 11L - us on standard three -inch and four -inch square or
octagonal back boxes. An adapter plate is packaged with
CSFM 7300-1615: 109 the base.
. NYC/WA (12 92-E. Vol. X)
www.boschsecurity.com
2 I D278S Four -wire Addressable Detector Base (12 VDC)
Wiring Technical Specifications
The D278S accepts any wire from 12 AWG (2.0 mm) to
24 AWG (0.3 mm). The minimum wire size depends on Environmental Considerations
the number of bases used and the distance from the Temperature(operating): +32 °F to +100 °F(0 °C to +38°C)
FACP to the furthermost base. Refer to the D278S/
D298S Installation Instructions (P /N: 33353) for specific Mechanical Properties
wiring requirements. Color: Bone white
Dimensions (diameter x D): 6.375 in. x 0.9 in. (16.2 cm x 2.3 cm)
Parts Included Power Requirements (Auxiliary Supply)
Quant. Component Current (alarm): 40 mA
1 D2785 detector base Current (standby): 2.5 mA
1 Adapter plate (P /N: 18851) Voltage (operating): 9.6 VDC to 13.9 VDC
1 Hardware pack Trademarks
1 Literature pack
Chamber Check is a registered trademark of Bosch Security Systems in the
United States.
•
•
Ordering Information
• D278S Four-wire Addressable Detector Base (12 D278S
VDC)
•
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