LST ND2251EM User manual

Brand: LST

Model: ND2251EM

Type: User manual

LST ND2251EM is an addressable optical smoke detector that utilizes the ADM loop technology with System Sensor/200 protocol for constant communication with the fire detection control panel, allowing for periodic function testing and reliable fire pattern detection.

ND2251EM_DBL_LST_EN_0804.PDF • PAGE 1

ABuilding Safety. Building Security.

Optical Smoke Detector

ND2251EM

Description

Speciﬁ cations

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.

• ADM loop technology with

System Sensor/200 protocol

• Optional connection of remote

indicator

• Constant response sensitivity

• Extremely ﬂ at design

• Function testable with magnet

Operating voltage Supply through loop voltage

Current consumption max. 200µA (quiescent)

Ambient temperature -20°C to +60°C

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

LST ND2251EM User manual

LST ND2251EM User manual

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