Optical Smoke Detector
ND2251EM
•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 uses the scattered light principle, and was developed for the detection of smoke particles in a wide range of applications. The modern design of the sensing cham- ber allows to reliably evaluate the characteristics of fi re.
The proven ADM loop technology with System Sen- sor/200 protocol establishes a permanent communica- tion between the fi re detection control panel and the detector. That ensures a periodical function testing of the detector. In the control panel all types of fi res are detected by continuously comparing fi re patterns.
The infl uence of contamination on the optical measu- rement system is compensated for by using intelligent evaluation algorithms. With that, the response sensiti- vity of the detector is kept constant for a long time – a further effective step to avoid false alarms.
The two LEDs with 360° visibility indicate the activated condition of the detector. The detector address is selec- ted with two decadic rotary switches, thus allowing to change the detector without additional tools.
A detector function test can be conveniently conducted using a magnet. The detector can be attached to va- rious bases and it can be protected against theft.
Specifications
Operating voltage | Supply through loop voltage |
Current consumption | max. 200µA (quiescent) |
Ambient temperature | |
Relative humidity | 10 – 93% (no condensation) |
Dimensions ø × H | 102 × 45 (mm) |
Colour | cream |
Weight | 102g |
Approvals | VdS G200052 |
Order number | 241010 |
Order name | Optical Smoke Detector/Anal./200/SS ND2251EM |
Building Safety. Building Security.
A
© LABOR STRAUSS SICHERUNGSANLAGENBAU GMBH • | ND2251EM_DBL_LST_EN_0804.PDF • PAGE 1 |
OFFICE@LST.AT • WWW.LST.AT • ALL RIGHTS RESERVED |
|
