LST 2251EIS Folheto

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Ex-Sys200_DBL_LST_EN_0804.PDF • PAGE 1
A
Building Safety. Building Security.
IS Optical Smoke Detector 2251EIS
Specifi cations
Ignition protection 
intrinsically safe
Ex classifi cation 
EEx ia IIB T5
Operating voltage 
Supply through loop voltage
Current consumption at 24V 
330µA
Ambient temperature 
-25°C to +70°C
Relative humidity 
5 – 95% (no condensation)
Dimensions ø × H 
103 × 43 (mm)
Colour 
cream
Weight 
110g
Approval 
BASEEFA03ATEX0157X
 
LPCB 199m
Order number 
241025
Order name 
IS Optical Smoke Detector/Anal./200/SS 2251EIS
The addressable Intrinsically Safe Optical Smoke Detec-
tor 2251EIS (fi g. A) uses the scattered light principle 
and was developed for the detection of smoke particles 
in hazardous areas. The modern design of the sensing 
chamber 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.
Intelligent evaluation algorithms use the current condi-
tion of the sensing chamber to predict the likely time 
of the next maintenance. Thus the alarm threshold is 
automatically adjusted within the permissible range, de-
pending on the contamination. With that, the constant 
response  sensitivity  of  the  detector  is  ensured  for  a 
long time.
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 or test gas. The detector can be pro-
tected against theft.
•  Optical smoke detector
•   Safety barrier with galvanic isolation
•   Protocol interface for communication 
with the fi re detection control panel
•   ATEX certifi ed
fi g. A
fi g. B
fi g. C