for the System Sensor/200 Loop
• Optical smoke detector
• Safety barrier with galvanic isolation
fig. A
• Protocol interface for communication
with the fire detection control panel
fig. B
• ATEX certified
fig. C
IS Optical Smoke Detector 2251EIS
The addressable Intrinsically Safe Optical Smoke Detec- of the next maintenance. Thus the alarm threshold is
tor 2251EIS (fig. A) uses the scattered light principle automatically adjusted within the permissible range, de-
and was developed for the detection of smoke particles pending on the contamination. With that, the constant
in hazardous areas. The modern design of the sensing response sensitivity of the detector is ensured for a
chamber allows to reliably evaluate the characteristics long time.
of fire.
The two LEDs with 360° visibility indicate the activated
The proven ADM loop technology with System Sen- condition of the detector. The detector address is selec-
sor/200 protocol establishes a permanent communica- ted with two decadic rotary switches, thus allowing to
tion between the fire detection control panel and the change the detector without additional tools.
detector. That ensures a periodical function testing of
the detector. In the control panel all types of fires are A detector function test can be conveniently conducted
detected by continuously comparing fire patterns.
using a magnet or test gas. The detector can be pro-
Intelligent evaluation algorithms use the current condi- tected against theft.
tion of the sensing chamber to predict the likely time
Specifications
Ignition protection
Ex classification
Operating voltage
Current consumption at 24V
Ambient temperature
Relative humidity
Dimensions ø × H
Colour
intrinsically safe
EEx ia IIB T5
Supply through loop voltage
330µA
-25°C to +70°C
5 – 95% (no condensation)
103 × 43 (mm)
cream
Weight
110g
Approval
BASEEFA03ATEX0157X
LPCB 199m
Order number
Order name
241025
IS Optical Smoke Detector/Anal./200/SS 2251EIS
Building Safety. Building Security.
A
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