Bosch D263, D263TH Specsheet
Fire Alarm Systems | D263 Photoelectric Smoke and Smoke and Heat Detectors
D263 Photoelectric Smoke and Smoke and
Heat Detectors
www.boschsecurity.com
u 12 V or 24 V input
u Designed for commercial or residential use
The D263 family includes the following detector
models:
Model Description
D263 Two-wire
D263TH Two-wire with 135°F (57°C) heat sensor
D263THS* Two-wire with 135°F (57°C) heat sensor and
sounder
* Sounders produce 85 dB at 10 ft (3 m).
Each of these 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.
System overview
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.
u Two-wire application
u Light-emitting diodes (LEDs) indicate the status of
the chamber, power, and alarm
u Removable terminal block to simplify wiring
connections
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.
Functions
Chamber Calibration Tests
Check the sensitivity and calibration of any of these
detectors using a visual check, a magnet test, or a
voltage measurement test.
Visual check:
When the detector’s calibration is within the factorylisted range, the red alarm LED flashes once every
3.5 sec.
If the detector’s calibration is out of range for more
than 24 h, the red alarm LED flashes once a second.
Magnet test:
2 | D263 Photoelectric Smoke and Smoke and Heat Detectors
Hold a magnet horizontally against the detector for
about 10 sec and observe the LED.
• If the detector is within the factory-listed calibration
range, it goes into alarm and the Alarm LED latches
on.
• If the detector is too sensitive, the LED rapidly
flashes six times (once every half second) and the
detector signals an alarm.
• If the detector is not sensitive enough, the LED slowly
flashes four times, once every 2 seconds, and the
detector signals an alarm.
• If the detector does not operate, it does not signal an
alarm.
Voltage measurement test:
Use a D1005 Test Cable and a digital voltmeter to
measure the voltage and compare the results with the
factory-listed sensitivity range.
Certifications and approvals
Region Certification
USA UL UROX: Smoke - Automatic Fire Detectors
CSFM see our website
NYCMEA
MSFM
Hong Kong HKFSD D263\TH\THS
(UL268 and A), UROX7: Smoke - Automatic Fire Detectors Certified for Canada (cULus),
274-93-E, Vol. VII
Installation/configuration notes
Use smoke detectors for detection circuits that
protect people. Use heat detectors for circuits that
protect property.
Compatible Products
The following products are compatible with the D263
Series detectors:
Category Product ID Product Description
Control
Panels
Modules D132B Reversing relay module
Bosch Security Systems makes no claim written, oral, or
implied that the D263 Series detectors work with any
two-wire control panels except those specified in the
Control Panel Compatibility chart in Technical Service
Note (P/N: 31866).
Mounting
The detector has a mounting plate that attaches on a
standard four-inch back box.
For commercial and industrial installations in
accordance with NFPA 72, space each detector 30 ft
(9.2 m) apart.
Wiring
The terminal block accepts up to 12 AWG (ISO 4 mm2)
wire. You can remove the terminal block from the
detector for easier wiring. The terminal block snaps in
and out of the detector.
Parts included
QuantityComponent
1 Detector
1 Lit pack – Installation Manual, Technical Service Note on
installation
Technical specifications
Environmental Considerations
Radio Frequency
Interference (RFI)
Immunity:
Relative Humidity: Up to 93%, non-condensing
Temperature (operating): +32°F to +120°F (0°C to +40°C)
No alarm on critical frequencies in the
range of 26 MHz to 950 MHz.
Mechanical Properties
Dimensions (Diameter x H): 5 in. x 2 in. (12.7 cm x 5.1 cm)
Material: High impact, fire retardant ABS
plastic
Relay Contacts
Auxiliary Form C:
1 A, 120 VAC/30 VDC at 1 A, 30 W maximum
Power Requirements
Current Draw (alarm): Determined by control panel
Current Draw (standby): 0.080 mA at 12 V, 0.1 mA maximum
Current Draw (start-up): 0.12 mA
Current Draw (trouble): 0.1 mA maximum
Power-up Time: 22 sec maximum
RMS Ripple (maximum): 25% of DC input
Voltage (stand-by): 8.5 VDC to 33 VDC
Ordering information
D263 Two‑Wire Smoke Detector
Two‑wire photoelectric smoke detector.
Order number D263
D263TH Two‑Wire Smoke/Heat Detector
Two‑wire photoelectric smoke detector with a 135°F
(57°C) heat sensor.
Order number D263TH
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