LST Y72221, IST200 Specification Sheet

© LABOR STRAUSS SICHERUNGSANLAGENBAU GMBH • A-1231 WIEN • WIEGELESTRASSE 36 • TEL [phone] • FAX [phone]
[e-mail] • WWW.LST.AT • ALL RIGHTS RESERVED

Ex-Sys200_DBL_LST_EN_0804.PDF • PAGE 1

ABuilding Safety. Building Security.

for the System Sensor/200 Loop

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 Detec­tor 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 Sen­sor/200 protocol establishes a permanent communica­tion 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 condi­tion of the sensing chamber to predict the likely time

of the next maintenance. Thus the alarm threshold is
automatically adjusted within the permissible range, de­pending 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 selec­ted 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 pro­tected 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

© LABOR STRAUSS SICHERUNGSANLAGENBAU GMBH • A-1231 WIEN • WIEGELESTRASSE 36 • TEL [phone] • FAX [phone]
[e-mail] • WWW.LST.AT • ALL RIGHTS RESERVED

Ex-Sys200_DBL_LST_EN_0804.PDF • PAGE 2

ABuilding Safety. Building Security.

Safety Barrier Y72221

The Safety Barrier Y72221 (fi g. B) is used for intrinsi­cally safe electric circuits. The built-in zener barrier and
the safe galvanic isolation allow the connecton of fi re

detectors in hazardous areas. Due to the galvanic isola­tion, the earth leakage monitoring can remain activated
in the fi re detection control panel.

Ignition protection intrinsically safe

Ex classifi cation EEx ia IIC T5

Operating voltage Supply through the detector line voltage

Ambient temperature -20°C to +60°C

Dimensions W × H × D 20 × 110 × 107.5 (mm)

Mounting TS35 DIN rail

Colour green

Weight 100g

Approval BASEEFA Nr.: BAS00ATEX7087

Order number 228006

Order name Safety Barrier/Anal./200/SS Y72221

The Protocol Interface IST200 (fi g. C) serves for the
design of an intrinsically safe electric circuit in ADM
loop technology. It allows the bidirectional data traffi c
between fi re detection control panel and fi re detectors
in hazardous areas via an ADM loop with System Sen-

sor/200 protocol. The interface is always used toge­ther with the Safety Barrier Y72221. The Surface Moun­ting Box SMB500 is required for mounting the protocol
interface.

Protocol Interface IST200

Ignition protection intrinsically safe

Operating voltage Supply through loop voltage

Current consumption at 24V 14mA

Ambient temperature 0°C to +60°C

Relative humidity 5 – 95% (no condensation)

Dimensions W × H × D (without attaching sheet) 70 × 70 × 32 (mm)

Weight 155g

Order number 228007

Order name Protocol Interface/Anal./200/SS IST200

Specifi cations

Specifi cations