Optical Smoke Detector
• ADM loop technology with
System Sensor/200 protocol
• Optional connection of remote
indicator
• Constant response sensitivity
• Extremely flat design
• Function testable with magnet
Description
The addressable Optical Smoke Detector ND2251EM The influence of contamination on the optical measu-
uses the scattered light principle, and was developed rement system is compensated for by using intelligent
for the detection of smoke particles in a wide range of evaluation algorithms. With that, the response sensiti-
applications. The modern design of the sensing cham- vity of the detector is kept constant for a long time –
ber allows to reliably evaluate the characteristics of a further effective step to avoid false alarms.
fire.
The two LEDs with 360° visibility indicate the activated
The proven ADM loop technology with System Sen- condition of the detector. The detector address is selec-
sor/200 protocol establishes a permanent communica- ted with two decadic rotary switches, thus allowing to
tion between the fire detection control panel and the change the detector without additional tools.
detector. That ensures a periodical function testing of
the detector. In the control panel all types of fires are A detector function test can be conveniently conducted
detected by continuously comparing fire patterns.
using a magnet. The detector can be attached to va-
rious bases and it can be protected against theft.
Specifications
Operating voltage
Current consumption
Ambient temperature
Relative humidity
Dimensions ø × H
Colour
Supply through loop voltage
max. 200µA (quiescent)
-20°C to +60°C
10 – 93% (no condensation)
102 × 45 (mm)
cream
Weight
102g
Approvals
VdS G200052
Order number
Order name
241010
Optical Smoke Detector/Anal./200/SS ND2251EM
Building Safety. Building Security.
A
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