Fire fighting enterprises Fireray 2000 eexd User manual

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 1 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

♦ KEY FEATURES

⇒ Flameproof Receiver and Transmitter

⇒ Standard Fireray Controller Unit

⇒ High Coverage - up to 15002m per system

⇒ Low Cost

⇒ Beam Range 10 metres to 100 metres, in

normal use, 3m to 30 m retro operation.

⇒ 12 Volts dc to 24 Volts dc operation

⇒ Selectable Alarm Thresholds

⇒ Low Current Consumption

⇒ Manual or Automatic Fire Alarm Reset

⇒ Automatic Fault Alarm Reset

⇒ Ground Level Electronics

⇒ Extremely Rugged

⇒ Easy installation

⇒ Low maintenance

♦ APPLICATIONS

⇒ Zone 1 Environments

⇒ Refineries

⇒ Mills

⇒ Munitions Factories

⇒ Munitions Stores

⇒ Flammable Liquid Stores

⇒ Flammable Gas Stores

⇒ Flammable Powder Stores

⇒ Industrial Plants

⇒ Power Stations

⇒ Warehouses

⇒ Applications requiring highly rugged

detector heads

DESCRIPTION

The FIRERAY 2000 EExd SMOKE DETECTOR SYSTEM is designed primarily to protect EExd, IIB

hazardous areas.

It consists of a standard Fireray 2000 Controller/Analyser, combined with highly rugged flameproof

Transmitter and Receiver heads.

The Transmitter and Receiver Heads are designed to be mounted within the protected hazardous area,

whilst the Analyser is housed outside it. Using the Standard Analyser unit in this way allows a

significant cost reduction when compared to a system utilising flameproof enclosures for all

component parts. The maximum lateral beam coverage is 15m per Fireray System installed.

Once installed, the Transmitter Head projects a modulated Infra-Red Beam across the protected area, to

the Receiver head mounted opposite. The received signal strength is monitored and analysed in the

Ground Level Controller. Should the beam strength fall below the preset threshold for more than 8 -10

seconds, a Fire Alarm is signalled to the Control Equipment. The analyser also incorporates monitoring

for cable breaks or loss of function at the Transmitter or Receiver. If the signal strength is reduced

suddenly (<5 seconds) by greater than 93% a Fault Alarm is indicated to the Control equipment. The

Fire and Fault Alarm outputs are provided via two sets of Voltage-Free change-over relay contacts.

The Fire Alarm Relay may be set for latched or auto-reset operation as desired. The Fault Alarm is

designed to auto-reset once the signal is returned to serviceable limits.

The system may be used with ‘intelligent’ or ‘non-intelligent’ systems. Due to the very low current

consumption, back-up battery life is extended and the system may be powered from alarm loop

supplies in most cases.

PARTS LIST

1 x Transmitter Head (With Clear Lens)

1 x Receiver Head (With Dark Lens)

1 x Controller/Analyser Unit

1 x Adjustable Head Mounting Bracket

1 x Test Filter

1 x Installation Guide (This document)

1 x Atex Addendum Sheet 0600-(issue)

2 x Allen keys (5mm & 10mm)

1 x Bag of Bracket Fixings

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 2 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

PRINCIPLE OF OPERATION

General

The Fireray system operates by passing an infra-red beam between a Transmitter and Receiver,

through the protected area. The received signal strength will be attenuated if smoke is present in the

beam. The beam strength is measured continuously and, should any attenuation be present which

exceeds presets thresholds, fire or fault alarms are generated as appropriate. Each installed Fireray can

cover an area 7.5 metres either side of the beam, giving a maximum coverage of up to 15002m with a

100m beam path length.

Transmitter and Receiver Units

A modulated Infra-Red light beam is projected from the Tx (Transmitter ) via it’s optical system. The

projected beam has a circular footprint, with a useable spread of approx 3m @ 100m range. The Rx

(Receiver) has a corresponding filtered optical system which collects and focuses the beam onto a

photo-detector. During installation, the Rx has a maximum beam acceptance angle of up to 5°

(dependant on gain and threshold settings). The wide Tx beam, in conjunction with the large Rx

acceptance angle simplifies alignment and gives good tolerance to beam mis-alignments after

installation.

Controller Unit And Alarm Thresholds

The signal received at the Rx is amplified and filtered to reject sunlight and other unwanted optical

noise such as may be caused by ambient lighting,. The signal is then passed to the Controller Unit,

where it undergoes further filtering and validity checking, before finally being analysed for signal

strength. The signal is then compared to a reference level (determined by the user’s threshold setting),

and should the signal be reduced below the set threshold, the FIRE ALARM relay will be activated

within approx 12 seconds. Three user selectable threshold setting are available **. Note that only one

threshold switch must be closed to select the required threshold. A red lamp on the Controller Unit

front panel also indicates a FIRE ALARM condition.

Controller Unit -Fault Thresholds

If the signal is reduced suddenly by more than 93% in 8 to 10 seconds, perhaps due to total beam

blockage, a cable break, or the Tx or Rx becoming unserviceable, the controller interprets this as a

fault situation. Loss of power to any of the system parts will also cause a fault signal to be generated.

In any of these events, the controller will activate the FAULT ALARM relay continuously. The system

will return to normal operation immediately, once the correct signals are restored, except in the event

of a power loss to the controller, in which case normal operation is resumed after 50 seconds from

restoration of power. A yellow lamp (LED4) in the Controller Unit also indicates when the system is in

a FAULT or RESET condition.

Controller Unit - Compensation (AGC) Operation And Action At Compensation Limit

The Controller Unit also incorporates an AGC (Automatic Gain Control) system **, which monitors

very slow changes in the received signal due to contamination of the optical system (EG: build up of

dust on the lenses) and any changes due to system ageing. If the signal is reduced by more than approx

11%, the AGC system is activated. Then if the signal is still low after 1.5 hours, a 7% increase is made

to the system gain, to bring the signal strength back into the nominal range. Additionally, should the

signal strength increase, perhaps due to improved alignment following building movement, the system

can reduce its gain in 7% steps. From an initial nominal setting, up to 11 increasing and 3 decreasing

correction steps are possible.

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 3 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

Two possible actions are selectable, once the system has exhausted all compensation steps, as follows:-

• Leave the COMP switch in the Controller unit OPEN for BS5839 installations (UK). This

setting allows generation of a FIRE ALARM after reaching the compensation limit, even

though a FAULT ALARM will be active. This is the only time Fire and Fault indications

can occur together.

• Close the COMP switch if it is required that FIRE ALARM generation is inhibited once a

FAULT ALARM has occurred, due to reaching compensation limit.

Controller Unit - Relay Outputs

The Controller Unit has two sets of outputs for Fire and Fault indication, in the form of voltage free

single pole changeover relay contacts. The FIRE relay may be set to give either latching or non-

latching operation, determined by a switch (ALARM LATCH) on the Controller pcb. With the switch

closed, latching operation is selected.

Controller Unit - Signal Strength Metering

A ‘Metering ‘ output is also provided, to assist with installation. This gives a dc voltage which is

proportional to the received signal strength and can be monitored using a voltmeter.

Controller Unit - System Resetting

The system can be reset in any of three ways, as follows :-

• Using the RESET switch in the Controller Unit (Normally only used during installation).

• By taking the External Reset input low (to system 0V) for at least 5mS.

• By de-powering the system for 1 second, then re-powering.

Following a reset the system takes 50 seconds to self-calibrate. During this time the Fireray adjusts it’s

100% signal reference level and so must have a clear unobstructed beam. No tests should be carried

out until this initialisation period has elapsed.

Notes On Resetting Using The Internal RESET Switch

Note that for correct operation, the internal RESET switch must not be set to OFF whilst either of

the HIGH or LOW signal lamps in the Controller Unit are illuminated. The gain must be set

correctly to extinguish both lamps first. If this is not done the system AGC is locked and will not

operate. (This does not apply to the other two reset methods).

SUMMARY OF SYSTEM CONDITIONS :-

Possible Causes of FAULT Alarms

• Controller Unit RESET switch in ON position.

• Controller Unit EXTERNAL RESET input active ( at 0V)

• No power to Controller unit

• No Power to Tx unit

• Beam obscuration >93% for >5 seconds (for whatever reason)

• Tx or Controller power cable break.

• Receiver Signal cable break.

• AGC at limit of compensation.

• Rx/Tx Mis-alignment causing low signal strength

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 4 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

• System unable to initialise following reset, due to inability to calibrate correctly (perhaps caused by

interference or testing of the beam before expiry of the 50 second calibration period.

• High or Low signal when Controller Unit’s RESET switch set to OFF (AGC locked out).

Possible Causes Of FIRE Alarms

• In normal use, beam strength reduced by more than the set threshold (Smoke in beam).

• During installation, no threshold switch set at the Controller Unit (One switch only must be set).

Possible Causes Of FIRE And FAULT Alarms Together

• AGC at limit of compensation, COMP switch OPEN (UK installations only) and beam strength

reduced by more than the set threshold.

PRECAUTIONS WHEN INSTALLING THE SYSTEM

Always ensure that the hazardous area into which the system will be installed is safe to work in, and

that neither you nor the installation will compromise the safety of that area.

Ensure that all mandatory and local regulations, regarding both fire alarm systems and EExd, IIB

applications, are adhered to.

Choose solid, stable surfaces on which to mount the Receiver and Transmitter.

If one of the mounting surfaces for the Transmitter or Receiver is likely to be susceptible to

movement, always mount the Transmitter on the more stable surface. The Receiver is less affected by

mis-alignments.

The beam should be positioned approx 30cm to 60cm below the ceiling, to avoid smoke layering or

masking effects.

Take precautions to position the beam such that it cannot be blocked during the normal course of

operations in the building.

Avoid mounting near or over heaters systems etc. Heat haze may cause obscuration and high levels of

beam ‘noise’.

If possible, avoid areas subject to thermal ‘shock’, such as near external loading bay doors etc. If

condensation forms on the lenses, this will be seen as an obscuration.

Avoid high intensity lighting near the receiver lens and avoid angling the Receiver directly at the sun.

The system incorporates circuitry to minimise effects due to high levels of ambient light (>15000 Lux),

but over heating of internal parts may occur with very strong sources, due to the focused beam within

the Receiver.

If possible, avoid bunching the system cables with factory power or other cabling.

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 5 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

To achieve maximum EMI rejection, use screened cables for the system wiring, properly terminated at

metal glands (Do not use screen pigtails). MICC cable is recommended.

Use the correct EExd approved cable gland types for all system parts in the hazardous area.

Cables must be suitable for a minimum temperature of 101°C.

SETTING UP AND ALIGNING - DIRECT BEAM MODE

The Transmitter and Receiver heads must be positioned on stable, solid facing surfaces, such as

parallel walls, approx 0.3m to 0.6m below the area ceiling (See application notes near the end of this

guide). The surfaces must be parallel, vertically and horizontally within approx 20 degrees, although a

greater positioning range is possible (up to 40 degrees off line-of-sight) if the Receiver is also fitted it

with an Adjustable Mounting Bracket. This is available as an optional extra. If only small adjustments

are required, the Receiver line-of-sight may be adjusted by fitting spacer washers to it’s wall fixing

screws, between the Receiver Case and the mounting surface. (Some applications may require

fabrication of angled mounting brackets etc, in order to cope with awkward wall positions etc. These

are not supplied).

Install all required cabling to the defined positions for each system part. (See wiring diagram on

following page, for a typical installation). Ensure compliance with all regulatory and local

requirements for Hazardous Areas and Fire Alarm Systems. Approved screened cables and approved

EExd glands and termination methods must be used. Glands at the Controller, Rx and Tx must be

metal EExd types. The Cable screens or jackets must be terminated properly at the glands, with a 360°

termination. Screen Pigtails must not be used.

Mount the Receiver first, such that it faces, and has un-obstructed line of sight with the expected final

Transmitter position. Remove the Receiver housing top (using 5mm Allen key provided). Connect the

system cabling to the 3 way terminal block on the internal pcb. It is recommended that the External

Earth point be used on the Tx and Rx housings, to minimise wiring lengths. This must be taken to the

nearest suitable building Earth point. Alternatively, the housing’s Internal Earth stud may be

connected, via an additional cable core and connected back at the Control Unit Earth. (see wiring

diagram on the following page for connections and earthing regimes). Check the connections and

tighten the cable glands, then refit the housing top, taking care to position the ‘O’ ring seal correctly,

just below the flange. Tighten the 4 securing screws firmly. For safety reasons, and to give the best

EMI rejection, do not omit any of the Earth connections.

Fit the Transmitter head in a position which aligns as closely as possible with the Receiver line of

sight, making use of the adjustment bracket provided. A 12mm AF spanner/wrench is required for the

adjustment bolts. Remove the Transmitter housing top (using 5mm Allen key provided) and set the

Range Switch to the correct or next higher setting, to match the expected operating range. Use a biro

tip to set the switches. The switches are ‘ON’ when moved outward, and ‘OFF’ when moved inward,

toward the housing centre. Note that only one setting must be selected ‘ON’. Connect the system

cabling to the 3 way terminal block on the internal pcb and Earth the unit housing in the same manner

as used for the Rx (see wiring diagram on the following page for connections and earthing regimes).

Check the connections and tighten the cable glands, then refit the housing top, taking care to position

the ‘O’ ring seal correctly, just below the flange. Tighten the 4 securing screws firmly. For safety

reasons, and to give the best EMI rejection, do not omit any of the Earth connections.

Install and wire the Controller unit in it’s defined position, outside the hazardous area. Set the unit’s

Alarm threshold to 25%, 35% or 50%. Only close one switch position, for the desired threshold. Set

the ‘ALARM LATCH’ switch as required. Switch Closed = latching Fire Alarm operation. For UK

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 6 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

installations, leave the ‘COMP’ switch open (Sets AGC operation at compensation limit - See

functional descriptions on page 2).

Check all wiring then apply power to all parts of the system.

At the Controller Unit, Set the Reset Switch to ‘ON’, and the Gain Control knob to approx midway.

Connect a length of two core bell wire or similar to the Metering terminals in the Control Unit. Run

this temporarily to the Transmitter position and connect a dc voltmeter to the ends. Set the voltmeter

to read up to 10Vdc or ‘autorange’.

Whilst observing the meter reading, adjust the Transmitter-to-Receiver alignment to achieve the

highest reading possible. A reading of at least 4.1Vdc is required for correct function (Note : <=2.7Vdc

= no signal). On completion, lock the transmitter adjustment bracket and all mountings securely,

checking the alignment on the meter whilst doing so. Remove the temporary meter wiring on

completion.

SETTING UP AND ALIGNING - RETRO-REFLECTED BEAM MODE

In this mode the beam is reflected from either a reflective prism or mirror. For most applications we

recommend using prisms, which are much easier to align. Prisms return the light beam along the same

axis as they receive it, whereas with a mirror the angle of reflection is the same as the angle of

incidence. Using a mirror, the beam may be reflected around structures or wall corners etc, however

setting up can be very difficult. Mirror applications are not covered in this document.

Using prsims, the installation and cabling is identical to that for the direct mode method except that the

Transmitter and Receiver must be mounted next to each other (as close as possible) and adjusted such

that both point at the prisms.

Choose Receiver and Transmitter mounting surfaces that are parallel to the prism mounting surface

within +/- 20°. If greater adjustment is required, then a second adjustable bracket may be fitted to the

Receiver (Optional extra)

Mount the Receiver first, such that it faces, and has un-obstructed line of sight with the expected prism

positions. Remove the Receiver housing top (using 5mm Allen key provided). Connect the system

cabling to the 3 way terminal block on the internal pcb. It is recommended that the External Earth point

be used on the Tx and Rx housings, to minimise wiring lengths. This must be taken to the nearest

suitable building Earth point. Alternatively, the housing’s Internal Earth stud may be connected, via an

additional cable core and connected back at the Control Unit Earth. (see wiring diagram on the

following page for connections and earthing regimes). Check the connections and tighten the cable

glands, then refit the housing top, taking care to position the ‘O’ ring seal correctly, just below the

flange. Tighten the 4 securing screws firmly. For safety reasons, and to give the best EMI rejection,

do not omit any of the Earth connections.

Fit the prisms on the opposing surface, ensuring (by eye) that they are perpendicular to, and centred

on, the Receiver lens central axis.

Mount the Transmitter on it’s adjustment bracket close alongside the Receiver, aligning it as closely as

possible with the prisms, making use of the movements provided. A 12mm AF spanner /wrench is

required for the adjustment bolts. Remove the Transmitter housing top (using 5mm Allen key

provided) and set the Range Switch to at least twice the range between the Tx/Rx and the prisms. Use

a biro tip to set the switches. The switches are ‘ON’ when moved outward, and ‘OFF’ when moved

inward, toward the housing centre. Note that only one setting must be selected ‘ON’. Connect the

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 7 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

system cabling to the 3 way terminal block on the internal pcb and Earth the unit housing in the same

manner as used for the Rx (see wiring diagram on the following page for connections and earthing

regimes). Check the connections and tighten the cable glands, then refit the housing top, taking care to

position the ‘O’ ring seal correctly, just below the flange. Tighten the 4 securing screws firmly. For

safety reasons, and to give the best EMI rejection, do not omit any of the Earth connections.

Install and wire the Controller unit in it’s defined position, outside the hazardous area. Set the unit’s

Alarm threshold to 25%, 35% or 50%. (50% recommended, which is approximately equivalent to a

25% setting in direct mode) Only close one switch position, for the desired threshold. Set the

‘ALARM LATCH’ switch as required. Switch Closed = latching Fire Alarm operation. For UK

installations, leave the ‘COMP’ switch open (Sets AGC operation at compensation limit - See

functional descriptions on page 2).

Check all wiring then apply power to all parts of the system.

At the Controller Unit, Set the Reset Switch to ‘ON’, and the Gain Control to approx midway.

With the system installed and powered up, monitor the signal strength using a voltmeter (10Vdc range

or ‘autorange’) connected to the Controller unit’s METER + and - terminals.

Whilst observing the meter reading, adjust the Transmitter-to-prism alignment to achieve the highest

reading possible. A reading of at least 4.1Vdc is required for correct function (Note : <=2.7Vdc = no

signal). On completion, lock the transmitter adjustment bracket and all mountings securely, checking

the alignment on the meter whilst doing so. Note that, as for the direct mode installation, a Fireray

Alignment Aid may be used in place of the Voltmeter, aligning for the highest flash rate. Remove the

temporary meter wiring on completion.

Return to the Controller Unit and observe the Green lamps either side of the Gain Control. Adjust the

Gain Control such that the two lamps both extinguish completely.

Set the Controller unit’s Reset Switch to ‘OFF’, observe that the yellow FAULT lamp extinguishes,

then wait at least 50 seconds while the system calibrates. After 50 seconds, check that the FAULT

lamp is still extinguished. The system is now armed and active.

TESTING THE SYSTEM

Following installation, test the system as follows :-

First ensure that the system is running and has been allowed time to calibrate (50 seconds after power-

up or reset).

Fire Alarm

• Place the striped end of the test filter over the Receiver lens.

• A Fire Alarm shall be indicated in approx 10 to 12 seconds.

Fault Alarm

• Place a complete blockage (example: a hand) over the Receiver lens. Ensure that the lens is

fully covered.

• A Fault Alarm shall be indicated in approx 4 to 6 seconds.

For Retro operation only

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 8 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

• To check that the beam is being reflected by the prisms, rather than some other reflective

surface, block off the beam completely at the prisms using a suitable non-reflective blind

(sheet of black cardboard or similar). A Fault Alarm shall be indicated in approx 4 to 6

seconds.

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 9 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

HIGH

LAMP

LOW

LAMP

RELAY WIRING,

CONNECT AS REQUIRED

TO INDICATING

UIPMENT

TEST/RESET

⇐

ON OFF

⇒

SW5

+V Rx

SIGNAL Rx

0V Rx

TEST

METER

EXTERNAL

RESET

+VE

OPTIONAL

TRANSMITTER P.S.U

(OR USE CONTROLLER

AND RECEIVER P.S.U)

12Vdc TO 24Vdc

N/O

100MA (T)

+VE

CONTROLLER AND

RECEIVER P.S.U

12Vdc TO 24Vdc

ALARM

N/C

N/O

N/C

SIGNAL LEVEL

COMP

25%

35%

50%

EExd

GLAND

EExd

GLAND

METAL

GLAND

METAL

GLAND METAL

GLAND

METAL

GLAND

OPTIONAL REMOTE

RESET WIRING

(

SEE TEXT

)

CLOSE TO

RESET

HAZARDOUS ⇐

AREA ⇒NON-HAZARDOUS

AREA

METAL EExd

GLAND

METAL EExd

GLAND

Rx EXTERNAL CASE

EARTH (SEE TEXT)

Tx EXTERNAL

CASE EARTH (SEE

SUPPLY

12Vdc

24Vdc

FAULT

LAMP

LED1 LED2

LED4

CONTROLLER UNIT/PCB

• Typical installation shown (See text).

• Do not omit any Earth connections.

• MICC cable recommended for all cabling.

• Approved, EExd glands must be used at the Rx

and Tx, and at the interface partitioning the

hazardous and non-hazardous areas.

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 10 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

1020406080100

TRANSMITTER REQUIRES 2 CORE SCREENED WIRING

TO SUITABLE POWER SUPPLY, PLUS ENCLOSURE

EARTH BONDING.

THE ENCLOSURE EARTH BOND MAY BE CONNECTED

TO THE INTERNAL OR EXTERNAL EARTH TERMINALS

AND MUST NOT BE OMITTED.

-VE +VE

Do not route wiring within the

50mm circular central area, to avoid

obscuring optical components

Internal Earth stud

will be found in one

of these two positions

External Earth terminal will be

found in one of these two positions

User wiring terminals.

Wire only to the -VE and +VE

terminals. (Middle ‘SIG’ terminal

not used on Transmitter units)

User wiring to enter here, via suitable

EExd IIB or IIC approved gland.

VIEW INSIDE TRANSMITTER UNIT WITH TOP WINDOW SECTION REMOVED

SHOWING TERMINALS AND SETTINGS ETC

note: some components not shown for clarity

REF:

Range switch shown set to

100m. Only one switch position

to be ON at a time

Do not use this hole for cable entry

(EExd blanking plug fitted at factory)

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 11 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

-VE +VE

Do not route wiring within the

50mm circular central area, to avoid

obscuring optical components

Internal Earth stud

will be found in one

of these two positions

External Earth terminal will be

found in one of these two positions

User wiring to enter here, via suitable

EExd IIB or IIC approved gland.

VIEW INSIDE RECEIVER UNIT WITH TOP WINDOW SECTION REMOVED

SHOWING TERMINALS AND SETTINGS ETC

note: some components not shown for clarity

SIG

RECEIVER REQUIRES 3 CORE SCREENED WIRING TO

CONTROLLER UNIT, PLUS ENCLOSURE EARTH BONDING.

THE ENCLOSURE EARTH BOND MAY BE CONNECTED TO

THE INTERNAL OR EXTERNAL EARTH TERMINALS

AND MUST NOT BE OMITTED.

User wiring

terminals. Connect

back to Controller

Unit via suitable

EExd cabling.

Do not use this hole for cable entry

(EExd blanking plug fitted at

factory)

FIRERAY 2000 EExd

Hazardous Area Smoke Detector

Installation Guide

Page 12 of 14

** See specification on page 13 for technical details 23989.00.C (25.08.05)

10°

SINGLE BEAM MULTIPLE BEAMS

SEE NOTE 3

15m MAX 30m MAX. OVER 30m

7.5m 7.5m 0.5m MIN. 15m 15m

A ceiling or roof with a slope in excess of 3.5 degrees should be regarded as an apex roof.

ote 3: No more than 3m of the beam path should be within 500mm of any wall or partitions.

When Firerays are mounted in the apex the horizontal distance may increase by 1% for each degree of ceiling

slope, up to 25% maximum, (for Fireray in apex only).

APEX CEILINGS

10° SLOPING ROOF 30° SLOPING ROOF

7.5m 7.5m+8.25m 8.25m+7.5m 7.5m 18.75m MAX.

(7.5 + 7.5 x 2.5%)

SLOPING CEILINGS

7.5m 15m 0.5m

SEE NOTE 3

RECEIVER AND TRANSMITTER SHOULD BE POSITIONED 0.3m TO 0.6m BELOW THE CEILING

Tx Tx

20°

Tx Tx Tx Tx Tx Tx

0.5m MIN.

30°

FIRERAY 2000 EExd - SYSTEM SPECIFICATION

Page 13 of 14

SYSTEM TYPE

Transmitter (TX) Rugged for EExd IIB areas - IP67

Receiver (RX) Rugged for EExd IIB areas - IP67

Controller (CU) Designed to be sited outside the hazardous

area. Rugged for light industrial and

domestic use - IP50

CERTIFICATION

SIRA03ATEX1504

CONFORMS WITH

EExd General

requirements) BS EN 50014 : 1998

EExd enclosures BS EN 50018 : 2000

Fire Alarm Systems BS 5839 : Pt 5 : 1988

Emc Immunity BS EN 61000-6-2:1999

Emc Emissions BS EN 61000-6-4:2001

Alarm Systems - EMC BS EN 50130-4 1996

ATEX Directive 94/9/EC

TEMPERATURE

Range -20°C to +55°C

THRESHOLDS

Alarm 25%, 35% or 50%**, switch selectable

(1.25db, 1.87db or 3.01db**)

** For full compliance with BS5839 Pt.5,

use 25% and 35% thresholds. 50% threshold

is normally recommended for retro mode.

Fault >=93% (11.55db), fixed

DETECTION TIMES

Fire 10 seconds (min)

Fault 5 seconds (min)

SYSTEM RANGE

Minimum 10m (3m in ‘Retro’ mode)

Maximum 100m (30m in ‘Retro’ mode)

RETRO PRISMS Use Part No: 23901

Range 3m to 5m use 2 prisms

6m to 10m use 4 prisms (Square)

11m to 30m use 6 prisms (Rectangle)

TRANSMITTER

Type Pulsed, Focused Infra-Red beam

Beam Half-Angle 1°approx

Spectrum Nominally 880Nm (Near Infra-Red)

Max IR O/P (mean) 6.4mW/Sr at IR LED

Max IR O/P (peak) 800mW/Sr at IR LED

Misalignment angle @25% and (@ 50%) threshold settings

During installation +/-1°(+/-1°) for a measurable signal

After installation +/-0.5°(+/-0.75°) (After perfect alignment)

Connections 2 wire, power only required - no connection

to other system parts necessary

RECEIVER

Misalignment angle @25% and (@ 50%) threshold settings

During installation +/-4°(+/-5°) for a measurable signal

After installation +/-3°(+/-4°) (After perfect alignment)

Connections 3 wire, connected to Controller Unit only

SUPPLY VOLTAGES (At each detector component)

Tx (nominal) +12Vdc to +24Vdc

Tx (min/max) +11.5Vdc to +28Vdc

Control/Rx (nominal) +12Vdc to +24Vdc

Control/Rx (min/max) +11.5Vdc to +28Vdc

Rx N/A, Supplied from Control Unit

SUPPLY CURRENT

Control/Rx (Normal) 7.5mA @ all ranges

Control/Rx (Alarm) 13.5mA @ all ranges

Tx 1.6mA @10m to 5.6mA max @100m

SUPPLY RIPPLE

Tx 0.5V p-p min, sine, 50-100Hz @11.5Vdc

Immunity increases with higher supply

voltage

Control/Rx 0.5V p-p min, sine, 50-100Hz @11.5Vdc

Immunity increases with higher supply

voltage

SYSTEM RESET

Internal Via slider switch in controller unit

External (1) Remote Reset input - Ground for >5mS

External (2) Power break for 1 second then re-power

INITIALISATION

TIME

Following reset 50 seconds

SYSTEM OUTPUTS

Fire Alarm Voltage-Free SPCO contacts, switch

selectable for latching or auto-reset

operation.

Fault Alarm Voltage-Free SPCO contacts, auto-resetting

operation

Contact ratings 1.0A @ 24Vdc (resistive)

0.3A @ 24Vdc (Inductive)

0.5A @ 120Vac (resistive)

0.2A @ 120Vac(inductive)

Meter Output DC output proportional to signal strength,

for alignment and maintenance check

purposes

Meter Range

No signal

Low signal

Normal signal

High signal

2.7Vdc to 6Vdc approx

2.7Vdc

>2.7Vdc to <4.1Vdc

4.25Vdc +/-0.15Vdc

> 4.4Vdc

COMPENSATION (AGC)

Function Detects and corrects for Rx/Tx lens

contamination, or minor gain errors after

installation or reset.

Update Period Every 1.5 hours

Correction step Approx 7% per step

Correction Range Approx -28% to +77% (% with respect to

initial setting)

SYSTEM CABLING

Max Cable Run 100m to any system part

Cable Type Screened (MICC recommended)

Max Capacitance 100pF/m

SIZES

Controller 215mm x 265mm x 88mm

Heads 120mm x 125mm x 125mm

Brackets 172mm x 124mm x 56mm

WEIGHTS

Controller 1060 grammes

Tx 2140 grammes

Rx 2165 grammes

Brackets 1530 grammes

FINISH

Controller White Powder Coat, to RAL 9010

Heads Red Powder Coat to RAL 2002

Brackets Red Powder Coat to RAL 2002

STATEMENT OF INTENDED USE

This system is intended for use as a Smoke Detector only, in EExd IIB, or lower grade areas. It must not be used in areas with a greater hazard rating.

It must be installed and tested by approved, competent personnel, in accordance with all regulatory and local codes of practise. No liability shall be

accepted for installations not conforming to this requirement.

WARNING