Specifi cations – LST 2251CTLE User Manual

Page 2

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2251CTLE_DBL_LST_EN_0850.PDF • PAGE 2

A

Building Safety. Building Security.

Specifi cations

Operating voltage

Supply through loop voltage

Current consumption

max. 300µA (quiescent)

Alarm temperature

58°C (maximum principle)

Infrared sensor

Optical wavelength

800 – 1200nm

Measurement range

0 – 450µW/cm

2

Measurement range CO-sensor

0 – 500ppm

Operating temperature

max. +45°C

Ambient temperature

-20°C to +55°C (no condensation or icing)

Relative humidity

15 – 90% (no condensation)

Dimensions ш Ч H

102 × 60 (mm)

Colour

cream

Weight

130g

Approvals

VdS G207054

0832-CPD-0518

Order number

241051

Order name

Optical Thermal CO IR Detector/Anal./200/SS 2251CTLE

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 response sensitivity of the detector can be individu-

ally adjusted in 5 steps between 1.5%/m and 4.2%/m

according to the application. In addition, the detector

adjusts the response thresholds of the individual de-

tection units dynamically, depending on their measured

values, changes the evaluation of the criteria, or speeds

up respectively delays the alarm activation. This evalu-

ation logic allows the multi-criteria detector to reliably

distinguish between emerging fi re and noise variables.

A thermal-only operation of the detector is also possib-

le. In that case the application of the detector is limited

to rooms which are not higher than 7.5m.

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.

The detector address is selected with two decadic ro-

tary switches. Therefore the detector can be changed

quickly and without additional tools.

A detector function test can be conveniently conducted

using a magnet. The detector can be attached to dif-

ferent types of bases and it can be protected against

theft.

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