Specifi cations – LST 2251CTLE User Manual
Page 2
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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.