SYSTEM SENSOR EUROPE
guide to intelligent
fire systems
Advanced Ideas. Advanced Solutions
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5. CALL POINTS..............................................................................................28
INDOOR................................................................................................................................................................................28
OUTDOOR.............................................................................................................................................................................28
WATERPROOF.......................................................................................................................................................................28
SWITCHES............................................................................................................................................................................28
ACCESSORIES......................................................................................................................................................................28
6. AUDIO VISUAL PRODUCTS ..........................................................................29
SOUNDERS...........................................................................................................................................................................29
DETECTOR BASE SOUNDERS................................................................................................................................................29
STROBES..............................................................................................................................................................................29
SOUNDER STROBES .............................................................................................................................................................29
BASES..................................................................................................................................................................................29
7. OTHER INFORMATION .................................................................................30
7.1. STANDARDS..................................................................................................................................................................30
7.2. APPROVAL BODIES FOR FIRE DETECTION PRODUCTS................................................................................................... 31
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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1.2. INTELLIGENT SYSTEM TYPES
1. INTELLIGENT FIRE ALARM
SYSTEMS
There are two methods commonly used for implementing
intelligent fire systems:
1.1. INTRODUCTION
The most common type of system is “Analogue”. In this
case the detector (or sensor) returns a value to the panel
representing the current state of its sensing element(s). The
control panel compares this value with the alarm threshold
in order to make the decision as to whether a fire is present.
Note that the term analogue, used to describe these systems
does not refer to the communication method (indeed many
“analogue” fire systems use digital communications) but to
the variable nature of the response from the detector to the
control panel.
Conventional fire alarm systems provide an adequate and
cost effective fire alarm system for many small buildings. In
larger, more complex buildings however, more sophisticated
‘intelligent’ fire alarm systems tend to be used. These
systems offer benefits in speed of detection, identification
of the location of a fire and easier maintenance. Intelligent
systems also offer tolerance to faults in the system wiring,
which allows a single pair of wires to be used to connect up
to 198 devices to the system, allowing cost savings in the
wiring of large systems. In larger installations, the benefits
of improved maintenance and reduced cabling cost are
overwhelming. Currently, the point at which an intelligent
system becomes economical is around 6 zones in the UK.
In “Addressable” type intelligent systems, mainly used to meet
the requirements of the French market, detector sensitivity is
programmed to each device by the control panel or is preset
in the factory. The detector compares its current sensor value
with the configured threshold to make the alarm decision,
which is then transmitted to the panel when the sensor is
interrogated.
This guide is intended as an introduction to the technology
used in intelligent fire alarm systems. For more information
on conventional systems, refer to System Sensor’s ‘Guide to
Conventional Fire Systems’.
In many systems the features offered by the two detection
techniques are so similar that it is not particularly relevant
which technique is used to make the alarm decision. It is
better to select a system based on the features offered by the
system as a whole.
ISOLATOR
FIRE ALARM SYSTEM OK
28 January 2004
14:01
SYSTEM OK
FIRE ALARM
FAULT
CONTROL
SYSTEM RESET
MODULE
1.3. COMMUNICATION PROTOCOL
CONVENTIONAL
ALARM ZONE
INTELLIGENT
FIRE ALARM
CONTROL
PANEL
Intelligent systems use the same pair of wires both to supply
power to the loop, and to communicate with devices on the
loop. The communication language, or protocol used varies
from manufacturer to manufacturer, but generally comprises
switching of the 24V supply voltage to other voltage levels to
achieve communication.
ISOLATOR
MONITOR
MODULE
CONTACT
(E.G. SPRINKLER
SWITCH
ISOLATOR
+24V
Panel to detector
Detector Response
Sensor Other Info
Figure 1.1.1 Intelligent Fire Alarm Systems
Device
Type
Detector
Address
Control
Value
e.g. drift
status
Figure 1.1.1 demonstrates an example of a single loop
intelligent fire system layout. The wiring is looped, and
connects to the control panel at each end. All detectors, call
points, sounders and interface modules are wired directly
to the loop, each having its own address. The control panel
communicates with each device on the loop, and if an alarm or
fault condition is signalled, or if communications are lost with
one or more detectors, the appropriate response is triggered.
The loop can be powered from each end so that if the loop is
broken at any point, no devices are lost. In addition the use of
short circuit isolators minimises the area of coverage lost in
the case of a short circuit.
Figure 1.3.1 Typical Protocol Configuration
A typical basic protocol comprises two main parts (See
Fig 1.3.1): A query or poll of a device by the control panel
including the device address and control information, and
a response from the device giving its status and other
information. Precise details of the information transferred will
depend on the manufacturer, but normally will include:
Poll: Control Panel to device:
• Device address
• Control of device LED - blink to indicate polling, switch
on when device is in alarm
• Control of device self-test
• Control of module output
• Error detection for example parity bit or checksum
Response: Device to Control Panel
• Device type (e.g. optical detector, heat detector, multi-
sensor detector, module)
• Analogue Signal - i.e. the current sensor value
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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only from one end. If the loop is broken (See figure 1.5.1.),
the panel will detect the loss of communications with the
detectors beyond the break, signal a fault, and switch to drive
the loop from both ends. The system therefore remains fully
operational, and can possibly even indicate the area of the
break.
• Alarm Signal if appropriate
• Status of module output
• Remote test status
• Manufacturer code
Most commonly, each device on the loop will be polled in turn,
however to increase speed around a loop, some protocols
allow polling of groups of devices on a single communication.
In order to give tolerance against short circuits on the loop,
short circuit isolators are placed at intervals on the loop.
Should a short circuit occur on the loop (Figure 1.5.2.) the
isolators directly on either side of the fault will isolate that
section. The panel will detect the loss of the devices, signal
a fault and drive the loop from both ends, thereby enabling
the remainder of the loop to operate correctly and ensuring
minimum loss of coverage.
Note that since different manufacturers have their own
protocols, it is important to ensure compatibility between
the detectors and control panel you intend to use. Some
detector manufacturers produce intelligent detectors
with different communication protocols for different
customers, so two detectors which look virtually
identical in appearance may not be compatible. Always
check with the manufacturer of the control panel.
Short circuit isolators are available as separate modules and
incorporated into a detector base.
1.4. ADDRESSING METHODS
Some products, for example System Sensor’s M200 Series
modules, have isolators built into each of the loop devices.
With this configuration, since only the section of wiring
between the two adjacent devices is isolated there will be no
loss of coverage should a short circuit occur.
Different manufacturers of intelligent systems use a number
of different methods of setting the address of a device,
including:
• 7-bit binary or hexadecimal DIL switch
• Dedicated address programmer
24V
• Automatic, according to physical position on the loop
• Binary ‘address card’ fitted in the detector base
• Decimal address switches
Line break
SYSTEM FAULT: OPEN CIRCUIT:
Zone 2 Module 01
FIRST FLOOR CANTEEN
Panel detects the loss of
devices after the break,
signals a fault and powers
from both ends of the loop
SYSTEM OK
FIRE ALARM
FAULT
to retain full coverage.
SYSTEM RESET
System Sensor’s Series 200 plus range of intelligent devices
uses decimal address switches to define a device’s address
between 00 and 99 (See Figure 1.4.1). This is a simple
intuitive method, not requiring knowledge of binary or
purchase of specialised equipment to set addresses.
INTELLIGENT
FIRE ALARM
CONTROL PANEL
24V
Figure 1.5.1. Open Circuit Fault
4
0
5
9
4
0
5
9
Isolating
Impedance
6
8
6
8
3
3
7
7
2
2
24V
Isolators on either side of
the short circuit switch an
impedance onto the line
to isolate it.
SYSTEM FAULT: SHORT CIRCUIT:
Zone 2 DETECTOR 03
FIRST FLOOR CANTEEN
1
1
SYSTEM OK
Devices between the two
isolators are lost,
FIRE ALARM
FAULT
however the remainder of
the circuit still operates
correctly.
Short Circuit
SYSTEM RESET
INTELLIGENT
FIRE ALARM
CONTROL
Isolators automatically
reset the line when the
short circuit is removed
Figure 1.4.1 System Sensor decade address switches
-Address 03 selected
PANEL
24V
Isolating
Impedance
Differences in the protocol between detectors and modules
allow them to have the same address without interfering
with each other, and normally address 00 (the factory default
setting) is not used within a system so that the panel can
identify if a device address has not been set: Hence a total of
up to 198 devices - 99 detectors and 99 modules (including
call points, sounders, input and output modules) may be
connected to a loop.
Figure 1.5.2. Short Circuit Fault
1.5. SYSTEM FAULT TOLERANCE
Due to the looped wiring method used for analogue systems,
they are more tolerant to open and short circuit wiring faults
than conventional systems.
Under normal conditions, the loop will typically be driven
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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use control modules to operate additional electrical equipment
such as air conditioning units and door releases to prevent the
spread of smoke and fire.
1.6. DRIFT COMPENSATION AND MAINTENANCE ALARM
The sensitivity of a smoke detector tends to change as it
becomes contaminated with dirt or dust (see figure 1.6.1). As
contamination builds up, it usually becomes more sensitive,
leading to the risk of a false alarm, but in some cases can
become less sensitive, so delaying the alarm if a fire is
detected. To counter this, if a detector drifts outside its
specification, a maintenance signal may be sent to the panel
warning that the detector needs cleaning.
The alarm signals can either be a zone of conventional
sounders and strobes activated via control modules on the
loop or directly from the control panel, or addressable loop
powered devices connected on the same loop as the detectors
and activated by direct command from the panel. Loop
powered sounders tend to have lower wiring costs, however
the number permissible on the loop may be restricted by
current limitations.
To further increase the maintenance interval, many systems
incorporate a “drift compensation” function, included in either
the detector or the control panel algorithms. These functions
use algorithms that monitor the sensitivity of a detector, and
modify its response to compensate for a build up of dust in
the chamber over time. Once the detector reaches the “drift
limit” when the dirt build up can no longer be compensated
for, a fault can be signalled. Some systems also incorporate
a warning to signal that a detector is approaching its
compensation limit and requires cleaning.
On larger sites, it may be desirable to use zoned alarms. This
allows a phased evacuation to be carried out, with areas
at most immediate risk being evacuated first, then less
endangered areas later.
1.9. FIRE SYSTEM ZONES
Conventional fire alarm systems group detectors into
‘zones’ for faster location of a fire, with all the detectors in
a particular zone being connected on one circuit. Although
intelligent systems allow the precise device that initiated an
alarm to be identified, zones are still used in order to make
programming the system and interpreting the location of a fire
easier. The control panel will have individual fire indicators
for each zone on the system, and the control panel response
to an alarm is often programmed according to the zone of the
device in alarm rather than its individual address.
Threshold
increased to
compensate for
increased chamber
clean air value.
Smoke required to
reach alarm
threshold reduces -
Detector sensitivity
increases
Whilst the division of a loop into zones is achieved within the
panel software, BS5839 part 1 recommends that a single
wiring fault in one zone should not affect the operation
of the system in other zones of the building. To meet this
recommendation, a short circuit isolator should be placed on
each boundary between zones (figure 1.9.1). In this instance,
a short circuit in one zone would cause the isolators on either
side of the zone to open, thereby disabling that zone. Any
devices in neighbouring zones would be protected by the short
circuit isolators and remain operational.
Time
Clean Air
Value
Uncompensated
Alarm Threshold
Uncompensated
Chamber Value
Compensated
Threshold
Figure 1.6.1 Chamber Contamination and Drift
Compensation
1.7. PRE-ALARM FACILITY
One advantage of intelligent type systems is that since the
data sent by a detector to the panel varies with the local
environment, it can be used to detect when the device is
approaching an alarm condition. This “Pre-Alarm” can be
signalled at the panel and can therefore be investigated to
check if there is a real fire, or if it is caused by other signals,
for example steam or dust from building work. This can
avoid the inconvenience and expense of evacuating a building
or calling out the fire brigade unnecessarily because of a
nuisance alarm. The Pre-Alarm Threshold is typically set at
80% of the alarm threshold.
ISOLATOR
FIRE ALARM SYSTEM OK
28 January 2003
12:15 pm
SYSTEM OK
FIRE ALARM
FAULT
Zone 1
SYSTEM RESET
INTELLIGENT
FIRE ALARM
CONTROL
PANEL
Zone 2
Zone 3
ISOLATOR
1.8. FIRE ALARMS
Zone 4
When a fire is detected, the control panel indicates an alarm
by activating the fire indicator for the relevant zone on the
control panel, sending a command to the relevant detector
to illuminate its LED and activate alarm signals to start
evacuation. Most intelligent fire system control panels include
alphanumeric displays enabling them to show information
on the source of the alarm. This may simply be a zone and
detector address, or could be more descriptive for example
“Smoke Detector, Bedroom 234”. The control panel may also
ISOLATOR
Figure 1.9.1 Intelligent System Fire Zones
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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1.10. REMOTE LEDS
1.13. ADVANTAGES OF INTELLIGENT SYSTEMS
Most system smoke detectors are equipped with a terminal to
allow the connection of a remote LED. Remote LEDs are often
used outside bedroom doors in hotels so that in case of a fire,
it is easy for the fire brigade to identify the location of the fire
without the need to enter every room in the building. They
may also be used where a detector is concealed in loft space,
for example, to provide a visual indication that the detector is
in an alarm state.
• The wiring cost of a system can be reduced by the use
of a single pair of wires for up to 198 devices including
smoke and heat detectors, call points, beam detectors,
input and output modules.
• Intelligent Systems allow the location of a fire to be
precisely located from the control panel
• The use of looped wiring allows the system to function
normally even with an open circuit in the loop wiring
1.11. INTERFACE MODULES
• The use of short circuit isolators allows correct
operation of most, if not all of the system even with a
short circuit in the loop wiring
Input and Output modules can be used to provide an interface
between a fire loop and a variety of types of electrical
equipment. Output or control modules can be used to operate
sounders or shut down electrical equipment by command
from the panel in case of a fire. Input or monitor modules are
used to monitor volt-free switch contacts, for example from a
sprinkler supervisory switch or an existing conventional fire
panel. Conventional zone monitor modules are also available,
providing an interface between a zone of conventional
detectors and an analogue fire detection loop, and are often
used when existing conventional systems are upgraded.
• Detectors are constantly monitored for correct
operation
• The use of a ‘pre-alarm’ feature alerts staff to check
whether a fire condition exists before the alarm is raised
• Different detector sensitivities can be used for diverse
applications
• The use of addressable loop-powered sounders allows
the same wiring to be used for sensors, call points and
sounders
1.12. PROGRAMMING OF INTELLIGENT FIRE ALARM
PANELS
• The use of monitor modules allows contacts from
sprinkler switches, existing fire alarm systems, fire
dampers etc. to be monitored using detector loop wiring
Most small intelligent systems can be programmed with
ease without the need for any specialised equipment. The
control panel has an alphanumeric keypad, which is used to
enter data into the system. Typically a password is required
to set the panel to ‘engineering mode’, allowing the panel to
be programmed. Many control panels have an ‘auto-learn’
facility, whereby the control panel polls every address on the
system, and detects which addresses have been used, and
what type of detector or module has been connected to each
address. As a default, the panel will usually programme all
the devices on the loop into the same zone. The user can
then customise the system by entering how the zones are
configured. The panel may give the user an option of how
modules are to be configured - for example whether an input
module should trigger an alarm or a fault when operated and
whether the wiring is to be monitored for open circuit faults.
• The use of control modules allows sounder lines, air
conditioning systems, lifts etc. to be controlled or shut
down using detector loop wiring
Other optional features may also be programmed using the
keypad. The sensitivity of each detector on the system can
be configured for high sensitivity if the detector is installed
in a clean smoke-free area, or for low sensitivity if the area
is subject to cigarette smoke, for example. The pre-alarm
facility may be enabled or disabled.
Complex intelligent systems offer many user-programmable
features that can be time-consuming to enter manually
using the keypad. In this case, many panels have the facility
to connect a portable PC by means of a serial data link.
The user is supplied with a specialised piece of software,
which enables the entire configuration of the system to be
programmed into the PC, away from site if necessary. It is
then a simple matter of temporarily connecting the PC to the
control panel and downloading the system configuration to
the panel. Once the information has been downloaded, it is
permanently stored in the control panel, and the PC can be
removed.
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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2. DETECTOR APPLICATION GUIDE
2.1. FIRE SYSTEM CATEGORIES.
Before a fire protection system can be designed, it is necessary to define the main objectives of the system. This is normally
determined by a fire risk assessment, and should be provided as part of the fire system specification. BS5839 Part 1: 2002
defines three basic categories of fire detection system.
2.1.1.
Category M Systems
Category M systems rely on human intervention, and use only
manually operated fire detection such as break glass call
points. A category M system should only be employed if no
one will be sleeping in the building, and if a fire is likely to be
detected by people before any escape routes are affected.
Any alarm signals given in a category M system must be
sufficient to ensure that every person within the alarm area is
warned of a fire condition.
Kitchen
Canteen
Pantry
Paper
Store
Office
Office
2.1.2.
Category L Systems
Category L systems are automatic fire detection systems
intended to protect life. The category is further subdivided as
follows:
Category L5: In a category L5 system certain areas within
a building, defined by the fire system specification, are
protected by automatic fire detection in order to reduce the
risk to life. This category of system may also include manual
fire protection.
Kitchen
Canteen
Pantry
Paper
Store
Office
Office
Example L5 System: L4 protection plus areas of high risk
Category L4: Designed to offer protection to the escape
routes from a building. The system should comprise Category
M plus smoke detectors in corridors and stairways
Kitchen
Pantry
Canteen
Paper
Store
Office
Office
Category L3: Intended to offer early enough notification of a
fire to allow evacuation before escape routes become smoke
logged. Protection should be as for category L4 with the
addition of smoke or heat detectors in rooms opening onto
escape routes.
Canteen
Pantry
Kitchen
Paper
Store
Office
Office
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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Kitchen
Category L2: Objectives are similar to category L3, however
additional protection is provided for rooms at higher risk.
Protection should be as for category L3 plus smoke detectors
in specified rooms at high risk
Canteen
Pantry
Paper
Store
Office
Office
Category L1: The highest category for the protection of life.
Intended to give the earliest possible notification of a fire in
order to allow maximum time for evacuation. Automatic and
manual fire detection installed throughout all areas of the
building. Smoke detectors should be employed wherever
possible to protect rooms in which people can be expected to
be present.
Kitchen
Canteen
Pantry
Paper
Store
Office
Office
Similarly to class M systems, all alarm signals given in
a category L system must be sufficient to warn all those
people for whom the alarm is intended to allow for a timely
evacuation.
2.1.3.
Category P Systems
Category P systems are automatic fire detection systems
whose primary objective is to protect property. The category
is subdivided as follows:
Category P2: Intended to provide early warning of fire
in areas of high hazard, or to protect high-risk property.
Automatic fire detection should be installed in defined areas
of a building.
Materials
Storage
Electric Plant
Computer
Equipment
Materials
Storage
Electrical Plant
Category P1: The objective of a category P1 system is to
reduce to a minimum the time from the ignition of a fire to
the arrival of the fire brigade. In a P1 system, fire detectors
should be installed throughout a building.
In a category P system, unless combined with category M, it
may be adequate for alarm signals simply to allow fire fighting
action to be taken, for example a signal to alert a responsible
person to call the fire brigade.
Computer
Equipment
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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2.2. MANUAL CALL POINTS
People can often still detect a fire long before automatic
fire detectors; hence manual call points are important
components of fire detection systems in occupied buildings
to ensure timely evacuation in the case of fire. All call points
should be approved to EN54-11, and should be of type A, that
is once the frangible element is broken or displaced the alarm
condition is automatic.
Manual call points should be mounted on all escape routes,
and at all exit points from the floors of a building and to
clear air. It should not be possible to leave the floor of a
building without passing a manual call point, nor should it
be necessary to deviate from any escape route in order to
operate a manual call point. Call points mounted at the exits
from a floor may be mounted within the accommodation or
on the stairwell. In multiple storey buildings where phased
evacuation is to be used call points should be mounted within
the accommodation to avoid activation of call points on lower
levels by people leaving the building.
In order to provide easy access, call points should be mounted
between 1.2 and 1.6m from the floor, and should be clearly
visible and identifiable. The maximum distance anyone
should have to travel in order to activate a manual call point
is 45m, unless the building is occupied by people having
limited mobility, or a rapid fire development is likely, in which
case the maximum travel distance should be reduced to 20m.
Call points should also be sited in close proximity to specific
hazards, for example kitchens or paint spray booths.
Pantry
Kitchen
Canteen
MAX DISTANCE 45M
1.2 to 1.6m
Office
Office
Figure 2.2.1. Manual Call Point Positioning
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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heat sensors, which can give a response to fast flaming
fires similar to that of ionisation detectors. Other sensor
combinations are also available.
2.3. SELECTION OF AUTOMATIC FIRE DETECTORS
Smoke detectors are the most sensitive automatic means of
detecting a fire and should be used wherever conditions allow.
Multi-Criteria
Alarm
2.3.1. Ionisation smoke detectors
Optical
Alarm
Ionisation smoke detectors use a weak radioactive source to
ionise the air between two electrodes, creating positive and
negative ions and so allowing a small current to flow across
the chamber. Smoke particles attract these ionised particles,
and allow positive and negative ions to recombine, thus
reducing the number of ions and hence the current flow.
Chamber
Response
Alarm
Threshold
Environmental regulations concerning the radioactive source
used in ion detectors means that they are now becoming
obsolete, and most major manufacturers are no longer
including ionisation detectors in new ranges.
Heat
Response
Time
2.3.2.
Photoelectric smoke detectors
Figure 2.3.2. Photo-Thermal Detector Response
Photoelectric or optical smoke detectors work by generating
pulses of infra red light and measuring any diffracted light.
If smoke is present in the sensing chamber, the light is
diffracted by the smoke particles onto a photodiode, which
senses the presence of the smoke (see figure 2.3.1). They
are now largely replacing ionisation detectors as a general
purpose detector.
2.3.4.
CO Detectors
A recent addition to BS5839 is CO detectors. These generally
use an electro-chemical sensor to detect carbon monoxide
given off by incomplete combustion. They provide reliable
detection of incipient fires whilst giving good assurance
against nuisance alarms. However the chemical cells used
in these detectors have a limited life span, and they cannot
detect fast burning fires due to the low CO levels produced.
2.3.5.
Heat Detectors
Heat detectors are normally used in environments where a
smoke detector might generate false alarms, for example
kitchens or shower rooms.
Rate of Rise heat detectors will alarm if the temperature
rises very quickly, or if the temperature reaches a set
threshold. This type of detector would be the first choice in an
environment where a smoke detector could not be used.
Without Smoke: Chamber is designed so
that light from the IR-LED does not reach
the receiver
In some environments, such as boiler rooms, fast rates of
rise of temperature can be expected normally, meaning that
there would be a risk of false alarms when using a rate-of-rise
device. In this case a fixed temperature detector would be
suitable. As their name implies, fixed temperature detectors
give an alarm once the temperature has reached a preset
threshold, most commonly 58°C or 78°C for EN54-5 Class AS
or BS respectively.
Smoke Present : Light from the IR-LED is
reflected off the smoke particles onto the
receiver, triggering an alarm signal.
2.3.6.
Optical Beam Detectors
Optical beam detectors work on the principle of projecting a
beam of light across a room, which is attenuated when smoke
is present thus allowing an alarm to be given (Figure 2.3.3).
There are two forms of beam detector: emitter and receiver
separate (single path), requiring separate wiring both to the
emitter and receiver, and reflective in which the emitter and
receiver are mounted in the same box, and the beam is shone
onto a reflective material at the far side of the room (dual
path).
Figure 2.3.1. - Operation of Optical Chamber
Photoelectric smoke detectors are tested across the complete
range of EN54 fires, however they are most sensitive to smoke
containing large particles from around 0.4 to 10 microns,
such as that given off by smouldering fires. A photoelectric
detector would therefore be a good choice in an environment
where a slow burning fire could be expected, such as a room
containing modern fabrics and furnishings.
2.3.3.
Multi-criteria Detectors
Since an optical beam detector senses smoke across the
entire smoke plume, it tends to be less affected by smoke
dilution as the ceiling height increases than point type smoke
detectors. In addition, a single beam detector can protect a
large area; hence they are particularly suitable for protecting
large high rooms such as sports arenas, warehouses and
shopping malls.
Multi-criteria detectors comprise two or more sensors within
the same housing, integrated by the detector electronics or
software to give a rapid response to a broader range of fires
and greater immunity to nuisance alarms. The most common
type at present is a combination of optical and rate of rise
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
Download from Www.Somanuals.com. All Manuals Search And Download.
Up to 100M
Beam
attenuated by
smoke plume
Reflector
Combined
Emitter /
Receiver Unit
Figure 2.3.3. Operation of Reflective Type Optical Beam
Smoke Detector
Beam detectors are more complex to install than ordinary
point smoke detectors and it is advisable to consult an
application guide for the use of projected beam smoke
detectors before considering the use of these detectors.
Detector type
Application
General purpose smoke detector – better Areas subject to smoke, steam, dust or
for fast flaming fires dirt during normal use
General purpose smoke detector – better Areas subject to smoke, steam, dust or
Not suitable for
Ionisation smoke detector
Optical smoke detector
for smouldering fires
dirt during normal use
Photo-thermal multi-criteria detector
Optical beam smoke detector
Rate of rise heat detector
General purpose detector – good for
smouldering and fast flaming fires
Areas subject to smoke, steam, dust or
dirt during normal use
Large and high rooms
Areas subject to smoke, steam, dust or
dirt during normal use
Areas subject to smoke, steam, dust or
dirt during normal use
Areas subject to rapid changes of
temperature or temperatures over 43°C
Fixed temperature detector (58°C)
Areas subject to smoke, steam, dust or
dirt and rapid changes of temperature
during normal use
Areas subject to temperatures over 43°C
High temperature fixed detector (78°C)
Areas subject to smoke, steam, dust or
dirt and temperatures over 43°C during
normal use
Areas subject to temperatures over 65°C
Figure 2.3.1. Selection of Fire Detectors
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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2.4. LOCATION AND SPACING OF AUTOMATIC FIRE
DETECTORS
2.4.2.
Ceiling Height
Smoke or heat detectors can only detect fires once a certain
amount of smoke or heat has reached the sensor. As the
height of a ceiling increases, the time taken for smoke or heat
to reach a sensor will increase, and it will become diluted
with clean, cool air. As a result, maximum ceiling heights are
limited as indicated in table 2.4.1 below.
It is important to consult applicable local and national
standards when choosing the spacing and location of fire
detectors. The following information is intended only as
a guide to the location and spacing of detectors. There is
currently no European standard available; hence this guide is
based on BS5839 part 1, 2002.
Detector type
Maximum ceiling height
10.5m
2.4.1.
Location and Spacing of Point Fire Detectors on
Point smoke detector conforming
to EN54–7
Flat Ceilings
On a flat ceiling with no obstructions, the radius of protection
of fire detectors is 7.5m for a smoke detector and 5.3m for a
heat detector, and detectors should be mounted a minimum
of 0.5m from a wall. Some analogue multi-criteria detectors
have a heat sensor only function, switched by the control
panel, typically used to reduce the possibility of false alarms
during daytime when a building is occupied, reverting to multi-
sensor operation at night time. If this type of operation is
employed, the radius of protection for a heat sensor should be
used. Figure 2.4.1 gives a simple spacing plan based on these
figures, however it should be noted that this might not be the
most efficient layout for a given site; for example in larger
areas, it is also possible to use a staggered layout, see figure
2.4.2, which may reduce the number of detectors required. In
practice, the layout of the room must be considered to obtain
the most efficient detector layout.
Heat detector conforming to
EN54–5 Class A1 (threshold 58°C) 9m
High temperature heat detector
conforming to EN54–5 Class B
(threshold 78°C)
6m
Optical beam detectors
25m
Table 2.4.1: Maximum ceiling height for different types of
detector
Often, a boundary layer can form close to the ceiling, which is
free of smoke and remains cool. To avoid this, and maximise
the probability of detection, smoke detectors should normally
be mounted with their smoke entry 25mm-600mm below the
ceiling, and heat detectors should be mounted with their heat
element 25mm-150mm below the ceiling. Detector design
normally ensures that the minimum requirement is met,
but care needs to be taken if the detectors are to be stood
away from the roof, for example mounting on an open lattice
suspended ceiling.
5.3m
7.5m
Another problem that should be considered is the possibility
of stratification of the air in a room into hot and cold layers,
causing the smoke or heat to stop at the boundaries. This
particularly affects high rooms or atria, where beam detectors
are often used. Stratification is very difficult to predict,
and can vary, even within the same room as environmental
conditions change.
3.7m
7.5m
10.5m
5.3m
Standard Heat Detector
Spacing
Standard Smoke Detector Spacing
Figure 2.4.1: Simple spacing plans for smoke and heat
detectors
2.4.3.
Ceiling Obstructions
Ceiling obstructions such as beams greater than 10% of the
ceiling height should be treated as a wall, and will thus divide
a room. Detectors should not be mounted within 500mm of
such an obstruction.
13m
If the depth an obstruction such as a beam is less than 10% of
the height of the ceiling, but greater than 250mm deep, then
detectors should not be mounted any closer than 500mm to
the obstruction.
Where an obstruction such as a beam or a light fitting is less
than 250mm in depth, detectors should not be mounted any
closer to the obstruction than twice its depth (see figure 2.4.3
below)
60 °
60 °
Where a ceiling comprises a series of small cells, for example
a honeycomb ceiling, or a series of closely spaced beams, for
example floor of ceiling joists, the recommended spacing and
siting of detectors changes further, dependant on the ceiling
height and the depth and spacing of the beams. Reference
should be made to relevant standards for details (in the UK
BS5839 Part 1: 2002, 22.3.k Tables 1 and 2).
Figure 2.4.2: Alternate smoke detector spacing plan for
protecting large areas
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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however along the roof apex spacing the lesser of the two
figures should be used, in this example 10.5m +18%. Where
the slope finishes within the adjusted detection radius, the
standard distance to the next row of detectors, 10.5m, should
be used. Care must be taken when placing the next row that
no gaps are left in detection coverage.
>10% of Ceiling Height
Treat as separate room
Minimum
500mm
>250mm
<10% of Ceiling Height
Max 600mm
Minimum
500mm
15m
40°
18°
Normal Detector Spacing, eg. 10.5m max
for “simple” layout.
9.35m
Height < 250mm
= 7.5 + 25%
7.5m
Minimum 2 x
height
Normal Detector Spacing, eg. 10.5m max
for “simple” layout.
Figure 2.4.3: Detector Spacing around isolated ceiling
obstructions
2.4.4.
Partitions and Racking
Where the gap between the top of a partition or section of
racking and the ceiling is greater than 300mm, it may be
ignored. If the gap is less than 300mm it should be treated as
a wall.
8.85m
=7.5 + 18%
To maintain a free flow of smoke and heat to the detector, a
clear space should be maintained for 500mm in all directions
below the detector.
Figure 2.4.5. Spacing of Smoke Detectors under a
Pitched Roof
2.4.6.
Corridors
In corridors less than 2m wide, detectors should be spaced
at a distance of 15m for smoke detectors and 10.6m for heat
detectors, with the maximum dimension to a wall at the end of
the corridor being 7.5m and 5.3m respectively.
>300mm : No effect
<300mm :Treat as wall
Minimum
500mm
Clear
In narrow rooms and corridors greater than 2m wide, due to
the way that the coverage radii of detectors intersect with
the walls of the corridor, the spacing between detectors
will increase. Figure 2.4.6 shows how, for a room 6m wide,
the spacing for smoke detectors can be increased from the
standard 10.5m.
Racking /
Shelving
Figure 2.4.4. Partitions
6.88m
13.75m
2.4.5.
Sloping Ceilings
Where the ceiling is pitched or sloping, the slope of the
roof tends to speed the rise of smoke or heat to the apex,
hence reducing the delay before the detectors are triggered.
For sloped roofs with a pitch height greater than 600mm
for smoke detectors, or 150mm for heat detectors, a row
of detectors should be placed within a maximum vertical
distance of 600mm or 150mm for smoke or heat detectors
respectively from the roof apex. Sloped roofs rising less than
600mm for smoke detectors or 150mm for heat detectors may
be treated as a flat ceiling.
7.5m
Note: Detectors are mounted in the centre line of the room
Figure 2.4.6. Smoke detector spacing in corridors greater
than 2m wide
Since the smoke or heat tends to rise faster up the slope, it is
permissible to use a greater spacing for the row of detectors
mounted in the apex of the roof: For each degree of slope
of the roof, the spacing may be increased by 1% up to a
maximum of 25%. Where, as in figure 2.4.5, the roof slopes
are unequal the spacing down the slopes can be unequal,
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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Where they are installed into voids, a detector's sensing
element should be mounted either in the top 10% or the top
125mm of the void space whichever is greater. Although it
can be difficult to install detectors the correct way up in void
spaces, care should be taken as incorrect orientation of a
detector can lead to increased ingress of dirt and dust, leading
to reduced maintenance intervals, and possible nuisance
alarms.
2.4.7. Stairwells and Lift Shafts
Internal stairwells and lift shafts and other vertical service
ducts through a building provide a clear path for smoke to
pass between floors of a building as if they were chimneys.
It is therefore important to protect these, preferably using
smoke detectors.
All vertical shafts through a building must be protected by
a smoke or heat detector at the top of the shaft, and by a
detector within 1.5m of each opening onto the shaft.
Detectors above a false ceiling may be used to protect the
area below it, if the false ceiling is perforated uniformly across
the complete area of the ceiling, with the holes making up
over 40% of the ceiling surface area, having a minimum size
of 10mm and the false ceiling having a thickness of less than
three times the dimensions of the perforations.
In internal stairways, a detector should be mounted on each
main landing (Figure 2.4.7). In addition, if the detectors on
the landings are separated by more than 10.5m, intermediate
detectors should be mounted on the underside of the stairs.
Detectors should also be fitted into any room opening directly
onto a stairway other than a WC cubicle.
In all other cases, the areas above and below a false ceiling
should be treated as separate, and thus should be protected
separately with detectors below the ceiling, and if necessary
in the void above the ceiling.
2.4.9.
Lantern Lights
A detector should be mounted in any lantern light used
for ventilation or having a height exceeding 800mm. The
temperature in lantern lights can change rapidly owing to
heating by sunlight, which means that rate-of-rise heat
detectors should not be used and heat detectors should be
protected from direct sunlight.
2.4.10. Location and Spacing of Optical Beam Detectors
Generally, for an optical beam detector mounted within
600mm of a ceiling, the fire detection coverage is up to 7.5m
either side of the beam (Figure 2.4.9). The beam of the
detector should not be closer than 500mm to any obstruction.
Similar recommendations to above apply to the application
of beam detectors with sloped ceilings, voids, false ceilings,
walls and partitions and ceiling obstructions.
Figure 2.4.7. Detector in Stairwells
Maximum 100m
Maximum
7.5m
Minimum
500mm
Transmitter or
Transmitter/Receiver
Receiver or
Reflector
1.5M
Maximum
15m
1.5M
Transmitter or
Transmitter/Receiver
Receiver or
Reflector
Figure 2.4.9: Standard Beam Detector Layout
Where it is likely that people will be present in an area
protected by beam detectors, the detectors must be mounted
at a minimum height of 2.7m, and consideration must also be
given to the possibility of other temporary obstructions to the
beam such as forklift trucks.
Figure 2.4.8. Protection of Vertical Shafts
2.4.8.
Voids and False Ceilings
For further information on the use and mounting of beam
detectors, see System Sensor Europe's Guide to Projected
Beam Detectors.
Detectors need not normally be installed in voids less than
800mm deep, unless on the basis of a fire risk assessment it
is thought that fire or smoke could spread extensively through
the voids before detection, or unless the fire risk in the void
is such as to warrant protection. Use of heat and smoke
detectors in voids greater than 800mm high is dependant on
the protection category, and fire risk assessment.
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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Where it is not possible to place a sounder within a room,
there will be a loss of approximately 20dB(A) through a
standard door, and 30dB(A) through a fire door.
2.5. ALARM SIGNALS
2.5.1.
Audible Alarm Signals
Audible fire alarm signals must provide a clear warning of a
fire to all those for whom the signal is intended. For category
M and L systems this would normally imply all occupants
of a building, however in some sites this may not apply, for
example in hospitals or rest homes, residents might need
assistance to evacuate, in which case it may be sufficient to
alert staff.
Fire Door
Reduces by
30dB(A)
Standard Door
Reduces by
20dB(A)
Sounder
Volume
115dB(A)
115 - 30 =
85dB(A)
85 - 20 =
65dB(A)
The general requirement for the volume of audible alarm
signals is that they should provide a Sound Pressure Level
(SPL) of at least 65dB(A), but not more than 120dB(A)
throughout all accessible areas of a building. See figure 2.5.1.
Warning: Volumes greater than 120dB(A) will cause
damage to hearing.
SOUND REDUCTION AGAINST DISTANCE
Based on a sounder rated at 1m
Minimum
65dB(A)
0
-5
dB(A) Reduction
Minimum
65dB(A)
Minimum
65dB(A)
-10
-15
-20
-25
-30
Minimum
65dB(A)
Minimum
65dB(A)
Minimum
65dB(A)
0
5
10
15
20
Distance (Metres)
Stairwell
Min 60dB(A)
In open space, as the distance from a sounder doubles, the
sound level will be reduced by 6dB(A), as shown.
Figure 2.5.1. General Fire Alarm Sound Pressure Levels
It is preferable to use multiple quieter sounders to achieve
the required sound level, rather than a smaller number of
loud devices. This is to prevent points of excessive volume,
which may lead to disorientation or damage to hearing. Two
sounders providing equal sound levels will combine to add
3dB(A) to the SPL.
Exceptions to this general rule are as follows:
• In stairways the SPL may be reduced to 60dB(A)
• Enclosures less than 60m² may be reduced to 60dB(A)
• There is no minimum for enclosed areas less than 1m²
• At specific points of limited extent the SPL may be
reduced to 60dB(A)
2.5.2.
Visual Alarm Signals
25m
Where a continuous background noise level greater than
60dB(A) is present the fire alarm signal should be 5dB above
the ambient, but not greater than 120dB(A).
-16dB
-23dB
69dB(A)
Sounder
Minimum
85dB(A)
63 + 3
= 66dB(A)
85dB(A)
0dB
Machinery
Generating
80dB(A)
62 + 3
= 65dB(A)
69dB(A)
-16dB
Note: dB(A) figures are for example only.
Left side represents attenuation; right side
indicates typical sound pressure level
Where the alarm is intended to wake people, an SPL of
75dB(A) is required at the bed head. Generally this will
require a sounder to be placed within the room.
Visual alarms are normally used only as a supplement to
audible alarms where they are likely to be ineffective, for
example in areas of high background noise levels where
hearing protection is likely to be worn. They can however
be used alone where audible warnings are undesirable for
example operating theatres and recording studios.
Volume at
Bed Head
75dB(A)
Visual alarms should be clearly distinguishable from other
warning lights, preferably red and should flash at a rate of 30
to 130 flashes per minute. The recommended mounting height
is above 2.1m, however they should not be mounted closer
than 150mm from the ceiling. They should be positioned so
that any alarm is clearly visible from all locations within the
area protected.
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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2.6 MAINTENANCE OF FIRE DETECTORS
2.7 ROUTINE FUNCTIONAL TESTING OF FIRE DETECTORS
Caution: Prior to carrying out any maintenance or testing
on a fire alarm system, the relevant authorities and staff
should be notified.
BS5839 Part 1: 2002 gives a range of recommendations
regarding routine testing of a fire detection system.
A weekly test should be carried out on a fire detection system
by activating a manual call point to ensure that all fire alarm
signals operate correctly, and that the appropriate alarm
signals are clearly received. This test should be carried out at
approximately the same time each week, using a different call
point in rotation.
Over time, the sensitivity of a smoke detector can change
owing to a build-up of dirt in the detector chamber. In most
modern detectors this effect is slowed by the inclusion of drift
compensation functions, however the build up can still lead to
a risk of false alarms or change in the detector sensitivity.
The frequency of maintenance requirements on a detector will In order to comply with BS5839 Part 1: 2002, periodic
depend on site conditions, obviously the dirtier the site the
more frequent maintenance will be required. The optimum
frequency for a given site should be determined over a period
of time after the commissioning of the fire system.
inspections, servicing and functional tests of the fire alarm
system should be carried out at intervals determined by
an assessment of the site and type of system installed, not
normally greater than six months.
All System Sensor detectors (smoke, heat, or multi-criteria)
are designed such that they can be easily dismantled for
maintenance. Instructions are given for maintenance in the
instruction manual supplied with each detector. Normally it
is sufficient to use compressed air or a vacuum cleaner to
remove dust from the detector chamber.
It is recommended to perform regular functional tests on all
fire detectors annually. These annual tests may be carried
out over the course of two or more service visits during the
twelve-month period.
System Sensor detectors include various means of testing the
system without using smoke, dependent on the detector range
being tested, including magnet switches and laser test tools.
Once maintenance on a fire detection system has been
completed, it should be re-tested.
Codes and standards (in the UK BS5839 Part 1:2002, Section
6) now require functional tests to introduce smoke through
the smoke detector vents and into the sensing chamber. It also
calls for heat detectors to be tested by means of a suitable
heat source, and not by a live flame. CO fire detectors now
also need to be functionally tested by a method that confirms
that carbon monoxide can enter the chamber.
Many installers use a set of equipment that consists of a
complete range of test tools that locate on the end of the pole
such as those available from No Climb Products Ltd. (www.
noclimb.com) in order to aid compliance with codes. Tools
exist for testing smoke, heat, and CO fire detectors, whilst
also enabling them to be accessed and removed at heights up
to 9 meters from the ground.
Using functional test equipment, along with those
maintenance tools available from System Sensor, should
ensure that the system remains at its optimum operation for
many years.
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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SERIES 200 PLUS ANALOGUE ADDRESSABLE DETECTOR RANGE
INTRODUCTION
System Sensor’s Series 200 plus range of plug in smoke detectors are a family of analogue addressable smoke detectors
combining state of the art design with micro-processor control and sophisticated processing circuitry to provide fast, efficient
fire detection in a wide range of applications.
All Series 200 plus detectors have two integral LEDs, which provide local visual indication of the sensor status. These LEDs
provide a dual function. In the event of an alarm, they are switched ON continuously, and can also be programmed to either
blink when polled by the panel or remain off during normal conditions. In addition to their integral LEDs, Series 200 plus
detectors can be connected to a remote LED indicator.
The individual loop address of each Series 200 plus detector can be easily set and read, using the rotary decade address
switches located on the rear of each sensor. The use of decimal address codes significantly reduces the potential for incorrect
address selection.
Each sensor base includes a tamper resistant option which, when activated, prevents the removal of the sensor from its base
without the use of a tool.
Full circuit functionality can be easily confirmed on site by use of the sensor test switch. This comprises a switch operated by
a magnet near the side of the detector. Operation of this magnetic switch simulates the effect of smoke or heat on the detector,
and will generate an alarm response to the fire alarm control panel, making system testing both convenient and simple.
SERIES 200 PLUS FEATURES
GENERAL SPECIFICATIONS
Electrical
• Microprocessor precision control
• Automatic drift compensation.
• Enhanced signal processing for improved stability.
• Extended Temperature Range
Voltage Range:
Standby Current:
Alarm Current:
15 to 32VDC
200µA at 24VDC (No communications)
7mA at 24VDC
• Twin LED indicators providing 360° visibility
• Rotary Decade Address Switches
• Stable communication with high noise immunity
• Tamper-Resistant (standard feature)
• Built in test switch
Environmental
Temperature Range:
Humidity:
-20°C to 60°C
10% to 93% Relative Humidity
(Non-condensing)
Mechanical:
Diameter:
Maximum Wire Gauge: 2.5mm²
102mm
• Third party certified to the latest EN54 standards with
multiple alarm thresholds
Colour:
Material:
Pantone Warm Grey 1C
Bayblend FR110
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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2251EM PHOTOELECTRIC SMOKE SENSOR
The 2251EM photoelectric smoke detector combines a state
of the art sensing chamber with microprocessor control
and sophisticated processing to eliminate transient noise
conditions thereby giving reliable fire detection whilst
minimising unwanted alarms. It is approved to a range of
sensitivities, permitting the detector to be configured to match
he application environment.
The 2251EM includes algorithms, which compensate for
a slow build up of contamination such as dust, within
he sensing chamber. Once the detector has reached its
maximum compensation level, a signal can be sent to the
control panel to indicate the need for maintenance.
Tested and approved to EN54-7: 2000 by LPCB
Specifications
Height:
Weight:
45mm in B501 Base
102g excluding base
2251TEM PHOTO–THERMAL SENSOR
The 2251TEM multi-criteria fire sensor incorporates an optical
smoke-sensing chamber and thermal-sensing elements
combined with microprocessor control and sophisticated
processing to eliminate transient noise conditions thereby
giving reliable fire detection whilst minimising unwanted
alarms. It can respond either as a smoke detector, or a rate of
ise heat detector or, using special algorithms combining both
elements to provide improved reliability of detection.
The 2251TEM is an environmentally friendly replacement
or an ionisation detector, providing rapid detection of
fast, flaming fires without incurring the significant end-
of-life disposal costs associated with products containing
radioactive material.
The 2251TEM is approved to a number of sensitivity settings:
Three Photo-Thermal and two Auto-Adjusting, which slowly
adjust the detector’s sensitivity to match short term changes
in its environment, thus reducing the potential for nuisance
alarms. In addition, it is possible to detect an alarm from heat
only, for day/night operation for example.
Similarly to the 2251EM, the 2251TEM includes algorithms,
which compensate for a slow build up of contamination,
such as dust, within its optical sensing chamber. Once the
detector has reached its maximum compensation level, a
signal can be sent to the control panel to indicate a the need
for maintenance.
Tested and approved to CEA 4021, EN54-7: 2000 and EN54-5:
2000 (Class A1R) by LPCB
Specifications
Height:
Weight:
45mm in B501 Base
115g excluding base
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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DRIFT COMPENSATION AND SMOOTHING
Effects of Drift Compensation
Drift Compensation and Smoothing eliminate nuisance
alarms and provide a consistent progressive alarm sensitivity
threshold throughout the period between service intervals.
Adjusted thresholds
Maintenance levels
In many instances this will result in an improved economic
performance through savings in the cost of maintenance by
extending the detector cleaning interval.
Analogue sensor value
Low fault threshold
Intelligent sensors incorporate enhanced digital signal
processing, eliminating spurious peaks.
Time: years
Processed versus Unprocessed Signals
Processed
Unprocessed
Time: hours
5251REM, 5251EM AND 5251HTEM HEAT SENSORS
The 5251 range of static element and “rate of rise”
temperature sensors provide solutions for a wide range of
applications.
The 5251EM and 5251HTEM are fixed temperature analogue
addressable sensors employing low mass thermistors and
microprocessor technology for fast response and linear
temperature sensing. Their linear response allows these
sensors to be used to signal temperatures over the range of
58°C (Class A1S) to 78°C (Class BS).
The 5251REM uses the same thermistor and microprocessor
technology to provide an alarm when the rate of rise
in temperature exceeds 10°C/minute (typical) or if the
temperature exceeds a threshold of 58°C (Response Class
A1R).
5251REM is approved to EN54-5: 2000 Class A1R
5251EM is approved to EN54-5: 2000 Class A1S
5251HTEM is approved to EN54-5: 2000 Class BS
Specifications
Height:
Weight:
51mm in B501 Base
102g excluding base
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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6500 AND 6500S BEAM DETECTOR
The 6500S and 6500 are addressable reflector- type linear
optical beam smoke detectors that can be directly connected
o an analogue loop circuit as a component of an intelligent
fire alarm system. The detectors have a range of 5m to 70m,
extending to 100m with a long-range reflector kit.
The 6500S and 6500 detectors are combined transmitter/
eceiver units. The Infrared transmitter generates a beam of
ight towards a high efficiency reflector. The reflector returns
he beam to the receiver where an analysis of the received
signal is made. The change in the strength of the received
signal is used to determine the alarm condition.
The 6500S features a unique remote test capability that fully
tests both the optics and the electronics of the device. An
optical filter is automatically introduced in front of the optics,
attenuating the returned beam and causing the unit to go into
alarm.
Both versions incorporate automatic drift compensation,
whereby the detector will adjust its detection thresholds in
line with any long-term signal reduction of the beam caused
by contamination of the optical surface.
The 6500 and 6500S also include built in short circuit isolators
(which may be wired out if required), reducing the number of
isolators required in the detection circuit.
Tested and approved to EN54-12: 2002
Specifications
Voltage Range:
15 to 32VDC,
or 15 to 28.5VDC if isolators used.
2mA at 24VDC (no communications)
8mA
Standby Current:
Max Alarm Current:
Temperature Range: -30°C to 55°C
Humidity:
IP Rating:
0 to 95% RH (Non-Condensing)
IP54
Detector Dimensions: 254mm x 190mm x 84mm (h x w x d)
Reflector Dimensions: 200mm x 230mm (for 5-70m)
Weight:
1770g
REMOTE TEST SWITCH
In the conventional version of the beam detector, an
optical filter is activated from ground level by a hard-wired
connection; in the addressable model it is initiated by a
command from the fire control panel to the servo motor.
The filter attenuates the beam, causing the unit to go into
alarm. This test process provides a complete check of every
component in the alarm path without the need for access at
high level.
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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7251 LASER DETECTOR
The Pinnacle high sensitivity laser based intelligent smoke
sensor is a unique offering from System Sensor that provides
extremely high sensitivity to fire conditions, by detecting the
earliest particles of combustion. This is achieved by combining
a patented optical chamber with the latest in laser diode and
precision optics technology, which enhances the sensitivity
of the device. The chamber is also linked to sophisticated
processing circuitry that incorporates smoothing filters to help
eliminate transient environmental noise conditions, which
can be the cause of unwanted alarms. The result is a very
sensitive but stable sensor that can achieve sensitivities of
0.006% to 0.6% per metre obscuration and provides up to 100
times more sensitivity than a standard photoelectric smoke
sensor. With its quick response and pinpoint accuracy, this
unique sensor is ideally suited to environmental applications
where there is substantial cost for downtime or a significant
investment in installed equipment has been made (e.g.
Electronics Manufacturer Clean Rooms, Telecommunication
Rooms, Computer Rooms etc.).
The sensor’s performance is improved even further by the
inclusion of special drift compensation algorithms, which
compensate for the build up of contamination in the sensing
chamber. There are three stages of drift compensation, ‘low
level alert’, ‘high level alert’ and ‘maintenance urgent’. The
‘low and high level alert’ signals are used to identify that
the Pinnacle sensor has accumulated significant amounts
of airborne particles and requires maintenance, whilst the
‘maintenance urgent’ signal indicates that the sensor has
reached the end of its compensation range.
Tested and approved to EN54-7: 2000
Specifications
Operating Voltage:
15 to 32VDC
Max Standby Current: 230µA at 24VDC (No communications)
Operating Temperature:-10°C to 55°C
Weight:
142g
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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2251EIS INTRINSICALLY SAFE DETECTOR AND IST200
INTERFACE
The 2251EIS analogue addressable photoelectric sensor is a
plug in Intrinsically Safe smoke sensor combining an optical
sensing chamber with analogue addressable communications.
As an Intrinsically Safe sensor, the 2251EIS has been designed
specifically to provide fire protection for most hazardous
environments, and has therefore been engineered so that it
cannot become a source of ignition in areas where potentially
explosive atmospheres are likely to arise.
The IST200 translator module serves as an interface between
the control panel and up to a maximum of 15 x 2251EIS smoke
sensors. The IST200 must be used in conjunction with a
Y72221 custom galvanic isolator barrier.
Tested and approved to EN54-7 and by BASEEFA (2001) to
EEx ia IIB T5 for use in Zone 0 hazardous areas.
Specifications
Note that there are limitations of capacitance, inductance and
nductance/resistance ratio connected within the hazardous
area. Reference must therefore be made to product data
before installation of these devices.
Voltage:
Max. standby current: 330µA
(One communication every 5s
17 to 24VDC
with LED blink enabled)
4.2mA at 24VDC
102g
Max. alarm current:
Weight:
ST200
nput Voltage:
Output Voltage:
Supply Current:
Dimensions:
Weight:
15 to 32VDC
20 to 24VDC
14mA at 24VDC
70mm x 70mm x 32mm (h x w x d)
142g
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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B500 SERIES BASES
A range of detector bases and accessories are available
for use with Series 200 plus plug in detectors to suit the
requirements of varying applications. All bases are 102mm in
diameter.
B501 Standard Base:
For normal applications.
Height:
Weight:
20mm
53g
B501DG Deep Base:
For use when cabling in surface mounted conduit.
Height:
Weight:
26mm
57g
B524HTR Heater Base:
Includes an anti-condensation heater for use in cold
applications where condensation may be expected. The
B524HTR uses heater resistors to provide an element of
heating to reduce condensation.
Height:
36mm
Weight:
92g
Power supply:
Temperature:
Up to 125mA; up to 32VDC
-30°C to 60°C
B524RTE Relay Base:
Relay base which follows alarm status of detector, used to
control external devices such as fire shutters.
Height:
36mm
Weight:
100g
Contact Rating:
Temperature:
2A at 30VDC no/nc
-10°C to 60°C
B524IEFT-1 ISOLATOR BASE
The B524IEFT-1 isolator base monitors the loop on either
side of the base, and if it detects a short circuit, it isolates
that side. As a result, when used in conjunction with other
isolator bases or modules, short circuits can be isolated
from the remainder of the loop, thus minimising the effect of
the fault. Once the short circuit is removed, the isolator will
automatically restore the loop.
Height:
26mm
Operating Temperature:-30°C to 70°C
Standby Current:
100µA
Max ON resistance:
0.2 Ohms at 24V
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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WB1 Wet Base:
For use in conjunction with the B501, increases the IP rating
of the detector from IP40 to IP42, providing protection from
water dripping from above.
Diameter:
Height:
Weight:
110mm
69mm
102g
RMK400 Recess Mounting Kit:
Used to recess Series 200 plus detectors into suspended
ceilings, reducing the detector height by approximately 20mm.
nterior diameter:
Exterior diameter:
Depth:
102mm
144mm
31mm
100g
Weight:
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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M200 SERIES MODULE RANGE
INTRODUCTION
The family of input/output modules form part of System Sensor Europe’s Series 200 plus family. Single and multi-way models
are available within the same mechanical package, reducing both the cost of installation and the mounting space required.
Their unique mechanical design allows each module to be mounted in either a wall box, on a DIN rail or within any type of
enclosure. Irrespective of the mounting method chosen, the address switches and indicator LED’s are visible and accessible.
To help engineers in the maintenance and fault-finding process, the LEDs, are multi-colour, providing diagnostic information
regarding the status of each individual input/output.
Each module has built-in short circuit protection for the communications loop; however, to increase application flexibility, the
isolators can be selected/deselected on an individual module basis.
For ease of installation, testing and maintenance, the field wiring terminals are of plug-in design.
Specifications
Operating Voltage:
15 to 30VDC
Operating Temperature:-20C to 60°C
Humidity Range:
Dimensions:
0 to 95% Relative Humidity
23mm x 93mm x 94mm (h x w x d)
(including terminal block)
Maximum Wire Gauge: 2.5mm²
M200-SMB Surface Mount Box
Dimensions:
134mm x 139mm x 40mm (h x w x d)
M200XE SHORT CIRCUIT ISOLATOR MODULE
The M200XE Isolator Module monitors the loop on either side
of the module, and if it detects a short circuit will isolate
that side. As a result, when used in conjunction with other
isolator bases or modules, short circuits can be isolated
from the remainder of the loop, thus minimising the effect of
the fault. Once the short circuit is removed, the isolator will
automatically restore the loop.
Specifications
Max standby current: 200µA at 24VDC
Max ON resistance:
0.13 Ohms at 15V
M210E SINGLE CHANNEL INPUT MODULE, M220E DUAL
CHANNEL INPUT MODULE AND M221E DUAL CHANNEL
INPUT, SINGLE CHANNEL OUTPUT MODULE
The M210E and M220E provide supervision of one or two
input circuits from external devices; the M221E also provides
an un-monitored single pole volt-free changeover contact
for external devices. Input channels are capable of both
latched and analogue supervision: There are three separate
latched states, normal, open circuit and combined alarm/
short. The analogue supervision continuously monitors the
supervised circuit, returning a signal proportional to the circuit
resistance.
Specifications
M210E
Max Standby current 310µA at 24VDC (No communications)
M220E
Max Standby Current: 340µA at 24VDC (No communications)
M221E
Max Standby Current: 340µA at 24VDC (No communications)
Output Relay Rating: 2A at 30VDC, resistive load.
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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M201E OUTPUT MODULE
The M201E optionally supervises the wiring to the load
devices and, upon command from the control panel, switches
an external power supply to operate these devices. It also has
built-in short circuit isolation capability. In normal supervised
mode, the device switches out the load supervision and
switches in the external power supply through a double pole
elay. The external power supply is monitored and raises an
unlatched fault condition if the voltage falls below the fixed
hreshold. In the unsupervised mode, the device provides
neither load nor power supply supervision and can be used to
switch a single form C set of changeover contacts.
ld selectable DIL switch allows the module to be used
lly meet the VdS 2489 requirements (subject to panel
port). Note: selecting this option imposes an additional
riction on the load that can be switched.
cifications
Standby Current: 310µA at 24VDC (No communications)
y Contact Ratings: Unsupervised form C: 2A at 30VDC
Supervised form C: 1.5A at 30VDC
01E-240 AND M201E-240-DIN 240VAC RELAY MODULES
M201E-240 is a loop-powered device controlling an
supervised double pole (one normally open, one normally
sed) output suitable for managing 240VAC loads. The
tput relay is a bi-stable device, latching in the on or off state
command from the control panel. The module is supplied
a wall-mounting box as standard with a grounding terminal
ovided.
The M201E-240-DIN has the same features and capabilities
as the M201E-240 but is designed to mount directly on to a
standard 35mm ‘Top Hat’ DIN rail. The module is supplied
unboxed for installation in a suitable enclosure.
Specifications
Max Standby Current: 275µA at 24VDC (No communications)
Relay Contact Ratings: 5A at 250VAC
Temperature Range: -20C to 60°C
Humidity Range:
0 to 95% Relative Humidity
M210E-CZ CONVENTIONAL ZONE MODULE
The M210E-CZ provides an interface between a zone of
conventional detectors and an intelligent signalling loop. The
module monitors the convention zone and transmits the zone
state (normal, open or short fault and alarm) to the panel.
Specficaions
urrent, externally powered zone:
288µA at 24VDC (No communications)
500µA at 24VDC
(One communication every 5s)
urrent, loop powered zone:
1.5mA at 24VDC
(One communication every 5s)
vailable for Detectors:
1.5mA additional to above
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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5. CALL POINTS
KAC’s range of Call Points comprise indoor, outdoor and
special environment products suitable for all applications.
They are available in a variety of colour and marking options
for a wide range of applications, including red for use in fire
systems.
An extensive range of adaptor trays is available, allowing easy
installation anywhere in the world.
The majority of the KAC product range is certified to EN54 Part
11, and other approvals are available.
INDOOR
KAC Indoor Call Points are available to satisfy all system types
from conventional switch only manual systems, through to
intelligent addressable systems.
Products are surface mounted using the fixings in the rear
enclosure. The back-box is supplied punched with centres to
assist drilling of cable entries.
Indoor products are generally rated at IP24D.
OUTDOOR
KAC Outdoor Call Points are available to satisfy all system
types from conventional switch only manual systems, through
to intelligent addressable systems.
Products are surface mounted using the fixings in the rear
enclosure. The back-box is supplied punched with centres to
assist drilling of cable entries.
Outdoor products are generally rated at IP55.
WATERPROOF
KAC Waterproof Call Points are available to satisfy all system
types from conventional switch only manual systems, through
to intelligent addressable systems. Waterproof products are
rated at IP67.
Waterproof products for Marine Applications are certified with
Lloyds Register.
Products of this type are available which are certified for use
in Hazardous Areas.
SWITCHES
KAC Call Point Switching Devices provide alternative methods
of manual activation of systems, rather than the traditional
break glass principle. There are both indoor and outdoor
models available in the familiar KAC housings.
A variety of different colours and switch types can be chosen,
key-switches and push buttons being the most popular. There
is also a large choice of text markings to identify the purpose
of the device.
ACCESSORIES
An extensive range of accessories supports KAC calls points,
including a number of mounting accessories, allowing easy
installation throughout the world.
More information about call points and their accessories is
available on the KAC website.
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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majority of back box formats.
6. AUDIO VISUAL PRODUCTS
A deeper profile base with knockouts and marked drilling
positions for rear and side entry allows for an IP55 rating,
when used with appropriate glands.
KAC Sounders and Strobes from simple tone set conventional
products to fully featured fourteen-tone intelligent units, a
range of sounders, strobes and combined sounder-strobe
products suitable for all applications.
The IP66 base has the same features as the IP55, but includes
a sealing kit to increase the protection rating.
The range meets the requirements of EN54 Part 3; key
products are LPCB and VdS Approved. All are fully tested
under simulated climatic conditions to ensure “real-world”
conformance to the published specifications.
SOUNDERS
KAC Sounders are available in four or fourteen-tone versions.
They operate at 9-33VDC, optimised for use at 12 and 24 volts.
Four tone sounders have a high, medium and low volume
selection, whilst the fourteen tone sounder has a volume
control.
The sounders have a distinctive, acoustically efficient low
profile shape, producing high sound output at low current
levels. The shape provides a wide-angle uniform sound
distribution providing good audibility in all directions.
The sounders are of rugged construction with solid-state
electronics providing high reliability and stable performance.
Three bases are available: low profile IP44, IP55 or IP66.
DETECTOR BASE SOUNDERS
KAC Detector Base Sounders are for use either underneath
smoke detectors or fitted with a red or white lid as a low
profile wall mounted sounder. They are available in four or
fourteen tone versions. They operate at 9-33VDC (nominally
12 and 24 volt). Four tone sounders have a high, medium and
low volume selection, whilst the fourteen tone sounder has a
volume control.
The package is acoustically very efficient, producing omni-
directional high sound output with low current levels. The
detector base sounder can be used under any smoke detector
with 60mm mounting centres and an external diameter of up
to 102mm.
STROBES
The KAC Range of stand-alone Strobes is designed to provide
visual signalling for use in a wide range of applications. There
are both standard and high intensity output strobes available.
A variety of different coloured strobe lenses are available.
This variety of colours provides a range of products for
different applications.
SOUNDER STROBES
The KAC Sounder Strobe combines a full feature fourteen-tone
sounder with an integral strobe mounted on the horn. The
design provides an efficient combination of audible and visual
warning, in a package taking up no more surface area than a
standard sounder.
A variety of different coloured strobe lenses are available and
the product housing is available in either red or white.
BASES
Three bases are available for KAC Sounders and Sounder
Strobes. The standard base is an IP44 rated low profile unit.
The base has rear and side cable access suitable for use with
standard trunking and has mounting holes suitable for the
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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7. OTHER INFORMATION
7.1.
STANDARDS
To ensure that a fire alarm system provides adequate
protection, it is advisable to ensure that it meets all
relevant standards. The system should be designed in
accordance with relevant national and local standards.
Useful standards and references include:
British Standard Code of Practice for fire detection
systems BS 5839 part 1: 2002
European Standard for Fire Detection and Alarm Systems:
Control and Indicating Equipment
BS EN54 part 2: 1998
Sounders
BS EN54 part 3: 2001
Point Heat Detectors
BS EN54 part 5: 2001
Point Smoke Detectors
BS EN54 part 7: 2001
Manual Call Points
BS EN54 part 11: 2001
Optical Beam Detectors
BS EN54 part 12: 2002
These are all available from:
British Standards Institution
389 Chiswick High Road
London
W4 4AL
ent is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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7.2. APPROVAL BODIES FOR FIRE DETECTION
PRODUCTS
All components of the fire alarm system should be certified
to a European standard by an independent certification
body that specialise in the certification of fire and security
systems. These include:
BRE - LPCB
Building 3,
Bucknalls Lane,
Garston,
Watford,
WD25 9XX,
England
Tel: (+44) (0) 1923 66400
VdS
Amsterdamerstrasse 174,
50732 Köln,
Germany
Tel: +49 221 77 66 00
ANPI
Parc Scientific Fleming,
1348 Louvain-la Neuve Sud,
Belgium
Tel: +32 10 47 52 73
CNMIS
16 Avenue Hoch,
75008 Paris, France
Tel: +33 1 53 89 00 40
DIFT
Jernholmen 12,
DK-2650 Hvidovre,
Denmark
Tel: +45 36 349 000
Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire d
Reference must be made to relevant national and local standards.
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SYSTEM SENSOR EUROPE
15 – 19 Trescott Road
Trafford Park
Smallwood
Redditch
B98 7AH
United Kingdom
Telephone: + 44 (0)1527 406700
Fax: + 44 (0)1527 406699
manufacturing and support centres
RUSSIA
System Sensor Fire Detectors
Volochaevskaya Str 40, Bld 2
Moscow 109033
INDIA
System Sensor India
Pace city 2, Sector 36
Gurgaon -122004
Haryana, India
ITALY
System Sensor Europe
Via Caboto 19/3
34147 Trieste
Italy
Russia
Telephone: + 7 (095) 937-7982
Fax: + 7 (095) 937-7983
Telephone: + 91 124 6371770
Fax: + 91 124 6373118
Telephone: + 39 040 9490111
Fax: + 39 040 382137
Other operations in Australia, Canada, China, Hong Kong, Mexico and United States of America
WORLD HEADQUARTERS
System Sensor
3825 Ohio Avenue
St. Charles
IL-60174
United States of America
Telephone: + 1 630 377 6580
Fax: + 1 630 377 6495
Advanced ideas. Advanced Solutions
November 2004
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