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INTRINSICALLY SAFE - Photoelectric Smoke Sensor
Model 2251EIS
Overview
Features
Compatible with existing System Sensor Protocol
Low profle design
Reliable analogue addressable communications
Rotary decade address switches
Tamper Resistant
Twin LED indicators provide 3600 visibility
Built in test switch
Must be used in conjunction with IST200
Translator Module and Y72221 Galvanic Isolator
Compatible with the existing standard intelligent
sensor base
BASEEFA Approved to EEx ia IIB T5 or use in up to Zone 0
hazardous environments
Description
Intelligent
199p/03
The 2251EIS analogue addressable photoelectric sensoris a plug
in intrinsically sae smoke sensor combiningan optical sensing
chamber with analogue addressable
communications. As an intrinsically sae sensor, the2251EIS has
been designed specifcally to provide freprotection or most
hazardous environments, and hasthereore been engineered so that it
cannot become asource o ignition in areas where potentially
explosiveatmospheres are likely to arise.
The 2251EIS sensors are approved by BASEEFA to EEx iaIIB T5, or
use in hazardous environments. The 2251EISsensor is thereore
suitable or use in all hazardousareas up to Zone 0 areas and with
most gases, excludinghydrogen and acetylene.
The 2251EIS has two integral LEDs which provide local
visual indication o the sensor status. These LEDsprovide a dual
unction. In the event o an alarm, theycan be switched ON
continuously, and can also beprogrammed to either blink when polled
by the panel orremain o during normal conditions.
The individual loop address o each 2251EIS can beeasily set and
read, using the rotary decade addressswitches located on the rear o
each sensor. The use
o decimal address codes signifcantly reduces thepotential or
incorrect address selection.
Each sensor base includes a tamper resistant optionwhich, when
activated, prevents the removal o thesensor rom its base without
the use o a tool. Fullcircuit unctionality can be easily confrmed
on site byuse o the sensor test switch. Operation o this
magneticswitch will generate an alarm response to the fre
alarmcontrol panel, making system testing both convenientand
simple.
All System Sensor products are covered by our extended3 year
warranty.
0832-CPD-199Baseea03 ATEX0157X
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Architect/Engineer SpecicationsIST200 Intelligent Translator
Module
Description
The IST200 translator module is intended or use with analogue
addressable systems and in conjunction with 2251EIS intrinsically
sae photoelectricsmoke sensors. The IST200 translator module serves
as an interace between the control panel and up to a maximum o 15 x
2251EIS smoke sensors.The IST200 must also be used in conjunction
with a Y72221 galvanic isolator barrier (see below). To ensure
correct operation, the IST200 must only beconnected to a listed
compatible Control Panel.
The IST200 translator module can be easily mounted within System
Sensors existing SMB500 surace mount box (see diagram). The IST200
must belocated within a sae environment.
Y72221 Galvanic Isolator
Description
The Y72221 Galvanic Isolator is a single channel isolated
repeater. It is suitable or use as an intrinsically sae isolator
between an IST200 translatormodule and up to a maximum o 15 x
2251EIS intrinsically sae photoelectric smoke sensors. The Y72221
is designed to transer a DC current rom a sae
area to the hazardous area load, rom a 24V DC nominal voltage.
An AC signal ranging rom 0.6 to 24V will then be transerred,
allowing communication tothe 2251EIS sensors in the hazardous
area.
We would recommend the use o the Y72221 with all installations o
2251EIS sensors. We do not recommend the use o zener barriers, as
they need tobe tied to a high integrity earth, which can lead to
earth ault indications on some Fire Control Panels. Please reer to
the Fire Control Panel manuactureror compatibility inormation. The
Y72221 is certiied intrinsically sae to EEx ia IIC,
(Baseea00ATEX087X).
The Y72221 is suitable or DIN rail mounting and can thereore be
mounted within any electrical box with suitable DIN rail.
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2251EIS Electrical Specications
Operating Voltage Range 15 to 24VDC
Maximum Average Standby Current 330A (with LED blink
enabled)
Maximum Alarm Current (LED on) 4.2mA at 24VDC
Environmental Specications
Operating Temperature Range -100C to +600C
Humidity 5% to 95% Relative Humidity (non-condensing)
Intrinsically Sae Rating EEx ia IIB T5
Mechanical InformationHeight 43mm installed in B501 base
Diameter 102mm installed in B501 base
Weight 110g
Max Wire Gauge or Terminals 2.5mm2
Colour Pantone Warm Grey 1C
Material Bayblend FR110
Wiring
The capacitance and inductance or inductance/resistance (L/R)
ratio of the cable connected to the hazardous area between the
2251EIS
bases (B501) power terminals (1 and 2) must not exceed the
following values: -
Group Capacitance (F) Inductance (mH) L/R Ratio (H/ohm)
IIB 0.65 12.6 165
IIA 2.15 33.6 440
Architect/Engineer Specications
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DS2251EIS-07
Electrical Specications
Input Voltage Range 15 to 32VDC
Output Voltage 20 to 24VDC
Input Supply Current at 15V 21mA maximum*
Input Supply Current at 24V 14mA maximum*Max Wire Gauge or
Terminals 2.5mm2
* with minimum barrier resistance, recommended quantity o
2251EIS detectors, and normal operating conditions
Environmental Specications
Operating Temperature Range 0C to 60C
Humidity 5 to 95% Relative Humidity (non-condensing)
Mechanical Information
Height 70mm
Width 70mm
Depth 32mm
Weight 142g
Max Wire Gauge or Terminals 2.5mm2
Architect/Engineer SpecicationsIST200 Translator Module
Charles Avenue
Burgess Hill
RH15 9TQ
United Kingdom
Tel: +44 (0)1444 238820
Fax: +44 (0)1444 248123
Email: [email protected]
www.systemsensoreurope.com
System Sensor Europe (Technical Services)
Copyright 2005 System Sensor. All rights reserved.
All technical data is correct at time o publication and is
subject to change without notice. All trademarks acknowledged.
Installation inormation: in order to ensure ull unctionality,
reer to the installation instructions as supplied.
