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8/11/2019 FGS Datasheets Complete
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OMEGAIntegration Pte. Ltd.
Address: 1 Bukit Batok Street 22 | #03-02 GRP Building | Singapore 659592
Website: www.omega-in.com | Email: [email protected]
DID: (65) 6372 7436 | Main: (65) 6303 6288 | Fax: (65) 6303 6266
PROJECT NAME: P2045 PACIFIC CLASS 400
PACKAGE: FIRE & GAS DETECTION SYSTEM
OMEGA PROJECT NO.: P14-0003
PO NO.: PO13/12380
DATE: 24 MARCH 2014
PPL SHIPYARD PTE. LTD.P2045 PACIFIC CLASS 400
FIRE & GAS DETECTION SYSTEM
EQUIPMENTS DATA SHEET
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SECTION 1
FIRE DETECTION SYSTEM
EQUIPMENTDATASHEETS
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SECTION 1.1
T2000 MARINE PANEL
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MINERVA Marine
MX / T2000 Panel Range
Features:
Enhances fire detection and eliminates
unwanted alarms using fuzzy logic
Assists fire fighting and training by providing
on-screen risk management information
Helps fire crews by giving smoke density and
temperature readings in the affected areas
Simplifies maintainance by pin-pointing faults
Enables remote fault finding to be carried out
Flexible interfacing with graphic management
systems
MINERVA Marine Panel Range
MINERVA MX is a comprehensive range of fire
controllers designed and built to BSEN ISO9001/2
and EN54. An advanced proven microprocessor
based system, MINERVA MX provides conventional
and digital addressable detection for new, refurbished
and refitted detection systems.
A wide range of detectors and ancillaries makes
MINERVA MX suitable for applications from general
cargo vessels to large passenger vessels and offshore
installation.
What should you expect of your firedetection system?In broad terms: cost effective reliability and flexibility.
In today's vessels under today's conditions you should
also be looking for ease of operation, flexible
programming, precise fire source pin-pointing and the
kind of circuitry and sensitivity which ensures rapid
activation in the event of a fire.
MINERVAMX meets all theseexpectations as a matter of courseMX/T2000 is a comprehensive range of fire
controllers designed and built to BSEN ISO9001/2 by
the worlds leading fire and security company. The
MX/T2000 has been approved by all the major
marine authorities.
An advanced proven micro-processor based systemMINERVA MX provides conventional as well as
addressable detection at the price of today's
and compensations to be made for changes in
environmental conditions. In short, maximum
security whilst minimising the risk of false alarms.
Modular in design MINERVA MX provides
economical fire detection for small vessels but is also
flexible enough to implement the complex event
procedures required in larger ones. Detectors are
controlled in groups of up to 240 zones all software
configurable, so avoiding the expensive need to
hardwire each zone back to the control panel. Further
savings are made possible by harnessing the power o
the latest micro-processing technology to enable a
single loop of two-core cabling to carry both detection
and command signals.
Backwards compatibility is also achieved by using an
ancillary module which allows existing fire systems to
be updated and extended cost effectively, utilising
existing wiring where possible and with minimaldisruption. Other ancillary modules offer even greater
system flexibility: short circuit sensing isolation
ensures the MX/T2000 continues in operation, even
if a wiring fault occurs. Local sounder activation
further reduces wiring costs and switch monitoring
allows easy interface to a vessels machinery control
system.
Further flexibility and installation savings can be made
using the loop power MX/T2000 options. Loop
powered MX/T2000 panels allow sounders to be
powered from the same loop wires that carrycommunications and power to the detectors and
other ancillaries.
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MINERVA MX Key Functions
Thanks to powerful software each zone can be given a tailor-made
response text message to help locate the source of a fire. Software
configuration and reconfiguration can be carried out on site, with
minimum disruption and the avoidance of system down time. Correct
execution of the software is ensured by twin micro-processors that
perform watchdog functions on each other.
MINERVA MX sounders can be set for either continuous, pulse, or a
combination of two tones via the system software.
To aid the rapid location of fire, remote repeater panels or geographical
mimics can be connected to the controllers for greater monitoring
convenience, as can visual display units.
The displayed temperature and smoke density reading allows the
operator to quickly visualise the situation and select the appropriate
procedures to be implemented.
For management information, a printer can also be connected to the
MX/T2000 providing a hard copy of events. MINERVA MX has the
capacity to store up to 1000 events in its memory. Finally a weekly test
reminder facility can be built in, while a walk-test facility allows truly
cost-effective systems checking by a single operative.
MX / T2000
The MX/T2000 panels are intelligent EN54
approved and marine approved sub-panels,
which can be networked to provide up to 396
detection loops and installed to BS5839:Pt.1.
. The T2000 sub-panel supports up to four
loops supporting up to 1000 addressable
devices and can be expanded using
additional loop sub-panels
The panel consists of a strong stainless steel
enclosure incorporating a removable chassis
plate. The chassis plate holds:
. PSB800 5A 24Vd.c. battery backed power
supply and loop booster to EN54:pt.4. FIM800 field interface PCB incorporating
two MX DIGITAL loops
. CPU800 32 bit processor and memory
card
. Optional network card, additional loop
card(s) and remote diagnostic modem
. Optional IOB800 input/output expansion
card mounted on the PSB800
The panel has a strong cast aluminium frontdoor, which incorporates a modular user
interface that fully complies with EN54:pt.2.
The user interface incorporates the ODM800
operator display module with a 16 x 40-
character backlit LCD display, simple
alphanumeric keypad and 5 softkeys. The
OCM800 operator control module provides
all mandatory operator control keys and LED
functions including Manned/Unmanned
switching. Two control keys and 2 indication
LEDs are provided for vessel-specific
functions.
Control keys and LEDs are labelled in English
according to the default approved
functionality. The slide in decals can be
reversed and alternative text added.
MINERVA MX T2000 Repeaters
The MINERVA MX full function repeater is an
EN54 Marine approved repeater with optional
addressable EN54:Pt.4 power supply. The
repeater consists of a stainless steel backbox
and cast aluminium front door which
incorporates the ODM800 operator display
module with a 16 x 40-character backlit LCD
display, simple alphanumeric keypad and 5
softkeys. The OCM800 operator control
module provides all mandatory operator
control keys and LED functions including
Manned/Unmanned switching. Two control
keys and 2 indication LEDs are provided for
vessel-specific functions.
Control keys and LEDs are labelled in English
The back box has a removable chassis plate
with the PSM800 power supply, APM800
addressable PSU monitor module and space
for 2 x 7 Ah batteries to provide 72 h backup.
The MINERVA MX repeater with Power
Supply is connected to the Panel via the
remote bus (RS485, 1200 m distance). A
maximum of 7 repeaters (including one MX
REMOTE repeater) can be linked to each
MINERVA MX panel and can provide full
repeater functions for all panels on the system
The operator control module (OCM800) can
support up to 80 inputs and outputs in the
form of LED annunciators, IOB800input/output modules, XIOM universal I/O
modules or the XIOM 800 LED mimic
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Up to 99 MX/T2000 sub-panels can be linked together provid-
ing unrivalled design flexibility.
Interfacing to PLCs
An industrial standard protocol is available to allow the
MX/T2000 to communicate with PLCs. This is especially useful
in offshore type installations.
Remote Diagnostics
Reduces the cost of service and fault finding by using a trained
engineer in an office to remotely identify faults and solutions via
our unique MX Remote.
Graphical Management Systems
Provides intuitive user friendly graphics for easier incident man-
agement on large passenger vessels.
Peer-to-Peer Interface to 3rd Party Systems
Unique protocol to allow development of peer-to-peer interface.
Interfacing Options
MX CCU
To PLC
Max distance between
nodes is 1000m using
MICCcable
Max distance between
nodes is 3000m using
twisted/sheilded pair cable
Max distance between
nodes is 4000m using
fibre optic cable
OEM
Interface
TLO530 TLO530
Fibre
Interface
Fibre
Interface
Network
Interface
TLI800
MX Graph
Modem
Modem
MX Remote
PC
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or service without notice
Technical Specifications
Mechanical
Dimensions (WxHxD): Controller 440 x 320 x 135mm
Colour: Dawn Grey (Housing) Pantone - 431C
Modules)
Installation: Surface or Semi-flush Mounted
Environmental
Operating Temp. Range:_ 8C to + 55C
Storage Temp. Range: _ 20C to + 70C
Humidity: Up to 95% RH (Non-condensing)
Housing Protection To: IP42
Electrical
Mains Supply: 120V-240Vac + 10% / -15% at
50/60Hz
Secondary Supply: 24V d.c. Nominal
Input
T2000 Sub-Panel
No. of Loops: 4
Addresses per Loop: 250 Max
Output
T2000 Sub-Panel
Display: 240 Zone
16 x 40 Character
Sounder: There are two separate monitored
sounder outputs each rated at 2A.
Alarm: Fire _ Relay output rated at 30V d.c.
at 1.0A volt free c/o.
Fault _ Relay output rated at 30V d.c.
at 1.0A volt free c/o.
Detector Base Command Modules
801IB Isolator Base
801RB Relay Base
802SB Loop Powered Sounder B ase
5B 5 Universal Base
Command Modules
SNM800 Sounder Module
RIM800 Relay Module
CIM800 Contact Monitor Module
SB520 Sounder Booster Module
TM520 Timer Module
DIM800 Conventional Detector Module
APM800 Power Supply Monitor Module
MIM800 Mini Input Module
CP820M Indoor Callpoint
CP830M Outdoor Callpoint
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SECTION 1.2
800 SERIES DETECTORS
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MINERVA Marine
MX Virtual Multi-Sensor Detectors
Features:
Over 20 fire detection modes
Tyco MX FASTLOGIC Expert algorithms
MX HPO detection Algorithms
Up to 250 detectors per loop
Remote detector verification & temperature
read out
Programmable alarm LED with 360o
viewingangle
Optional detector locking pin
Variety of sounder and relay detector bases
Address flag stays with the base
Approved by all major classification societies
for use on vessels
Lower cost system design and installation as
one detection type can be used throughout
the vessel
Lower cost of ownership as no radioactive
source disposal costs together with less
spares holding
Enhanced safety in accomodation areas by
using the unique Carbon Monoxide (CO)
detectors
Major cable saving options using loop pow-
ered ancillaries
Allows easier decision making by operator
because of remote temperature and smoke
density read-out
MX Virtual Multi-Sensor Detectors
The 800 Series are addressable multi-sensor fire,
smoke and heat detectors, which can be
implemented as several MX VIRTUAL detectors by the
MX detection panel. The 800 Series are designed
and approved to EN54. The 800 Series of MX
VIRTUAL detectors provide the latest fire detection
technology in an attractive cost effective package.
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The 811PH is a state-of-the-art smoke andheat detector which allows a full set ofdetection modes to be implemented in theMX detection panel to suit most smoke andheat detection applications.The 811PH incorporates a uniquemousehole design optical chamber with anunrivalled signal to noise ratio providing highresilience to dust and dirt which meansreduced service costs. In addition a uniquechamber cover actually draws slow movingsmoke into the chamber to provide a moreresponsive detector.The 811PH provides all the features of MXVIRTUAL detectors including self verification,temperature and smoke level indication andunrivalled service functions.
Technical Specification
Dimensions: 109dia x 43H mm
Operating Temp: -20o
to +70oC
Storage Temp: -40o to +80oCRelative Humidity: 95% (non
condensing)
Standards: EN54 pt 5
EN54 pt 7
811PH Multi-Sensor Smoke and Heat Detectors
General
The 800 Series detectors are supplied in an extremely robust andreliable fully sealed construction, which has undergone stringentenvironmental type testing. All electrical contacts are moulded into theplastic to eliminate any movement.
The detectors are constructed from hardwearing Fire Resistant FR110Bayblend. The multi-sensor detectors are environmentally friendly.
They use no radioactive parts and can be returned to the factory forrecycling at the end of their life.All 800 Series detectors are supplied with integral dust covers as partof the packaging. Dust covers are retained throughout installation andremoved at commissioning time.
Installation & Service Features
The 800 Series MX VIRTUAL detectors include a host of installationand service features which are provided to reduce installation andservice costs and reduce repair times.
. Standard bases with multiple mounting options speed and simplifyinstallation
. Unique park position for commissioning and service procedures
. Detector Addressing programmed from the MX SERVICE Tool or
MX Panel. Address flag fixed to the base to prevent mix ups during service. Compatible with Tyco 600 and 900 Series bases for easy
upgrade. Panel Auto-Config and Self learn functions supported by the
detectors. Full range of remote installation and service tools. Dirty Detector Read-out can be viewed on the MX SERVICE tool or
panel
Detection Modes
All 800 Series detectors communicate to the MX detection panelusing the fast reliable MX DIGITAL loop protocol. This allows eachdetector to operate in one or two of several detection modes, thusallowing it to be easily optimised to the risk.To meet detection applications with multiple risks the 811PH and811CH detectors allow two detection modes to operatesimultaneously.
Virtual Detectors
The use of virtual detection means that installations can change thedetection mode without any physical change, taking place. Not onlycan the detection be changed at the time of installation andcommissioning but also during the life of the vessel as vessel usagechanges.Some MX detection panels even allow the detection mode to bechanged at different times of the day or automatically as occupancyand activity in the space changes.As well as providing great flexibility, using only two detector modelsmeans whole life costs are reduced by reducing manufacturing,stocking and service stocks. This also reduces the number of timesdetectors have to be changed during the life of the installation.
The 811CH is a state-of-the-art carbonmonoxide and heat detector which allows afull set of detection modes to be implementedin the MX detection panel to suit most fire andheat detection applications. The 811CH isparticularly well suited to accomodation areas,storage areas and applications where smokedetector positioning is difficult or wheresmoke detectors are prone to false alarm. Theintegration of heat detection into the 811CHallows the detector to operate in a widevariety of applications where combined risksmean that CO detection alone would beinsufficient.
The 811CH incorporates a reliable electro-chemical CO detection cell and highspecification low thermal mass thermistor foraccurate temperature detection. The 811CHprovides all the features of MX VIRTUALdetectors including self verification,temperature and CO level indication andunrivalled service functions.
Technical Specification
Dimensions: 109dia x 43H mm
Operating Temp: 0o
to +55oC
Storage Temp: -20o
to +55oC
Relative Humidity: 95% (non
condensing)
Standards: EN54 pt 5
EN54 pt 7
811CH Multi-Sensor Carbon Monoxide and Heat Detectors
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The 811H is a flexible cost-effective
addressable heat detector with all the features
of MX VIRTUAL detectors. The 811H returns
the temperature to the MX detection panel
which allows various detection modes to be
implemented. The 811H uses a high quality
thermistor with very low thermal mass. Thisallows the detectors to provide fast accurate
temperature detection as well as heat
detection.
Technical Specification
Dimensions: 109dia x 43H mm
Operating temp: -25 to +70oC
Storage temp: -40 to +80oC
Standards: EN54:pt.5
811H Heat Detectors
This is the most common base designed to fix
directly to the accomodation ceiling panel or
deckhead mountings. This base allows a
detector to be plugged in directly or a
functional base to be plugged in between the
base and detector.
Features
. Variety of Fixing Options
. Remote LED Connections
. Anti-Tamper Facility
. Park position and address flag holder
. Integral breakout locking key
5B 5 Universal Base
The 801RB provides dual relay contacts for
signalling external devices on MX addressable
systems. A very low operating current even
when the relay is energised enables the relay
base to be used without any additional power.The dual contacts are under the control of a
programmable output, through the powerful
cause and effect software.
Features
. Dual pole 24V DC relay contacts (60VA)
. Status indication LED
. Very low power consumption (
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or service without notice
800HL Indication Lamp
A new low current range of sounder bases for
use with the MX Fire Alarm Control Panel.
Features
Manufactured to EN54 part 3
Integral sounder and detector base
Volume and tone adjustable after installa-tion
Low Power Synchronisation
Do not require use of a standard base
(maybe installed directly onto a standard
deckhead mouting)
Fully programmable
MKII Sounder Base
All detector bases have the ability to drive a
remote LED in the event that the installed
position of the detector is not easily visible.
The 801RIL is compatible with all 800 Series
detectors.
Features
. UK Single gang mounting
. High intensity red LED
801RIL Remote Indication LED
The 800HL remote indicator lamp provides a
larger indicator for use in place of the RIL
when longer distances are involved. Typically
used to indicate the source of an alarm in
vessels with long alleyways eg. passenger
vessels.
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SECTION 1.3
811F/811FEx SINGLE FLAMEDETECTORS
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MINERVA MX Marine
811F & 811FEx MXTechnology Addressable Solar BlindInfraRed Flame Detectors
Features:
Unlike UV and UV/IR detection, not blinded
by oil mist in machinery spaces
Reduces cabling, no interface required
No additional power source required
Easy installation, uses a common plug in
base for smoke and heat detectors
Can be used on all vessels as fully marine
approved
Standard or Intrinsically Safe
ATEX approved
The 811F and 811FEx point type flame detectors are
part of the MXTechnology range of digital
addressable fire detectors. MXTechnology
incorporates heat, optical and carbon monoxide
detection. The 811F and 811FEx flame detectors
present a cost effective solution to providing false
alarm free flame detection for enclosed applications.
Both the 811F and the 811FEx are full featured solar
blind flame detectors for enclosed use and boast a
high degree of false alarm immunity. The standard
unit is the 811F and it is designed for direct
connection to the MX digital loop, employing the
same detector base or functional base as other 800
series fire detectors.
The 811FEx is an intrinsically safe version intended
for use in hazardous atmospheres and must be
connected via an EXI800 interface and galvanic
isolator. The detectors are designed to comply with
EN 50 014 and EN50 020 for intrinsically safe
apparatus. They are certified: ATEX code: II 1 G
Cenelec code: EEx ia IIC T4.
Ordering Information:
Stockcode Description
516.800.007 811F MX IR Flame Detector
516.800.067 811FEx MX IR Flame
Detector Intrinsically Safe
517.050.017 5B 5" Universal Base
516.800.903 801IB Isolator Base
517.050.610 MUBEx Base for
600/800Ex
514.001.063 EXI800 MX I.S. Loop
Interface
517.001.259 Pepperl& Fuchs KFD0-CS-
Ex1.54 Galvanic Isolator
517.001.247 DX170 MTL5/7000
Enclosure
592.001.012 T110 IR Test Source
592.001.018 T110 Test Source Adapter
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or service without notice
Mechanical
Detector Material: FR110 BAYBLEND
Dimensions (mm): 108 x 21.2
Weight: - 811F 74g
- 811FEx 108g
Electrical
Loop Voltage: 20 40 VQuiescent current: 300 micro Amp
Alarm current: 3 mA typical
Intrinsic Safety Rating
Maximum Voltage for Safety (Ui) 28V
Maximum Current for Safety (Ii) 93mA
Maximum Power Input (Pi) 650mW
Equivalent Inductance (Li) 0
Equivalent Capacitance (Ci) 0
Hazardous AreaATEX code: ATEX 0422X II 1 G EEx ia IIC T4
Environmental
Operating temperature: -20oC to +70
oC
Operation below 0oC is not recommended unless steps are taken to
eliminate condensation and hence ice formation on the detector.
Storage Temperature: -40oC to +80
oC
Relative Humidity: 90% RH continuous (non-condensing) and up to 99% RH
intermittent (non-condensing)
Performance
Range: 0.1m2
n-heptane at 20m
0.4m2
n-heptane at 50m
Field of View: 100o
Mounting Bases
5B: 5 Universal Base
MUBEx: I.S. Universal base
Functional bases that provide relays, sounders and isolation can beused with the 811F but cannot form part of an intrinsically safe
circuit.
Connections: L -VE IN/OUT
L1 +VE IN/OUT
801F Only R Remore LED -VE
MX Technology is a registered trademark of a subsidiary of Tyco International Ltd.
Note 1: When the risk is a hot
vibrating body the detector should
be mounted securely using a
suitably fabricated bracket at an
angle or on a vertical surface to
view the risk.
Note 2: Diagram not to scale
Approx Flame Area
50o 50o
4m
8m
0.2m2
16m
9.5m
19m
28.5m
38m
0.4m2
0.1m2
0.05m2
12m
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SECTION 1.4
800Ex SERIES DETECTORS
and CALL-POINTS
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MINERVA Marine
System 800 Fire Detection - Hazardous Areas
Features:
ATEX certified intrinsically safe Ex II1G
Higher reliability through the use of galvanic
barriers
Lower cost system design and installation as
one type of detector can be used throughout,
coupled with a full range of devices
Enhanced safety in Accommodation areas
Provides the designer with greater flexibility in
protecting hazardous areas
System 800 Fire Detection Hazardous
Areas
There is a risk of fire or explosion in all areas
containing flammable substances in the form of
liquids, gases, dust or materials. Where these
combustible materials are mixed with air in sufficient
concentration they form flammable atmospheres and
the areas containing them are designated Hazardous
Areas. When a source of ignition, such as a spark is
applied in a hazardous area, an explosion could take
place.
Electrical equipment supplied for use in Hazardous
Areas must comply with requirements to ensure that
its introduction into the area does not increase the
existing risk. We have designed Intrinsically Safe (I.S.)
systems and equipment for use in Hazardous Areas
which can be connected to Fire Detection Systems
installed in Safe Areas.
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801PHEx Smoke & Heat Detector
The 801PHEx Intrinsically Safe Optical Smoke & Heat Detector forms part of the 800Ex
Intrinsically Safe Series of MX Addressable Fire Detectors. The detector plugs into an MUBEx
base.
The detector is designed to transmit to a remote MINERVA MX / T2000 fire controller, digital
signals which represent the status of the optical smoke and heat elements of the detector.
Software within the controller is used to interpret the returned optical and heat values to raise an
alarm or other appropriate responses according to the type of detector configured in MX
CONSYS.
The mode of detector may be:
Optical smoke only detector (sensitivity High, Normal or Low)
HPO smoke detector (sensitivity High, Normal or Low)
Heat only rate-of-rise (A1R) detector (no sensitivity selection)
Heat fixed temperature 60oC (A2S) (no sensitivity selection)
Optical (sensitivity High, Normal or Low) combined with heat fixed temperature 60oC (A2S)
HPO (sensitivity High, Normal or Low) combined with heat fixed temperature 60oC (A2S)
These detectors are designed to comply with EN 50 014 and EN 50 020 for intrinsically safe
apparatus. They are certified:
ATEX Code: Ex II 1G
Cenelec Code: EEx ia IIC T5
801CHEx CO & Heat Detector
The 801CHEx Intrinsically Safe Carbon Monoxide plus Heat Detector forms part of the 800Ex
Intrinsically Safe Series of MX Addressable Fire Detectors. The detector plugs into an MUBEx
base.
The detector is designed to transmit to a remote MINERVA MX / T2000 fire controller, digital
signals which represent the status of the carbon monoxide and heat elements of the detector.
Software within the controller is used to interpret the returned Carbon Monoxide and heat values
to raise an alarm or other appropriate responses according to the type of detector configured in
MX CONSYS.
The mode of detector may be:
Heat only detector (A1R or A2S) (sensitivity: High, Normal or Low)
Compensated Carbon Monoxide detector (sensitivity: High, Normal or Low)
Compensated Carbon Monoxide detector (sensitivity: High or Normal ) combined with heat
(A1R)
These detectors are designed to comply with EN 50 014 and EN 50 020 for intrinsically safe
apparatus. They are certified:
ATEX Code: Ex II 1G
Cenelec Code: EEx ia IIC T5
801HEx Heat Detector
The 801HEx Intrinsically Safe Heat Detector forms part of the 800Ex Intrinsically Safe Series ofMX Addressable Fire Detectors. The detector plugs into an MUBEx base.
The detector is designed to transmit to a remote MINERVA MX / T2000 fire controller, digital
signals which represent the status of the heat element of the detector.
Software within the controller is used to interpret the returned heat values to raise an alarm or
other appropriate response according to the type of detector configured in MX CONSYS.
The mode of detector may be:
EN54-5 A1R, rate-of-rise normal ambient
EN54-5 A2S, fixed 60oC
EN54-5 CR, rate-of-rise high ambient
These detectors are designed to comply with EN 50 014 and EN 50 020 for intrinsically safe
apparatus. They are certified:
ATEX Code: Ex II 1G
Cenelec Code: EEx ia IIC T5
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IS28 Banshee Sounder
The IS28 intrinsically safe banshee sounder has been developed for use in hazardous areas.
Up to a maximum of four sounders may be used. Each IS28 banshee has an output of 94dBA at one metre,
this sound output will reduce to approximately 90dBA when four sounders are fitted to a circuit.
Certification No. Classification
ITS03ATEX21311X EEx ia 11C T5
CP 840Ex Break Glass Callpoint
The CP840Ex Intrinsically Safe Weatherproof Break Glass Callpoint is designed to monitor and signal the
condition of the switch contact associated with the break glass.
The callpoint is designed to comply with EN 50 014 and EN 50 020 for intrinsically safe apparatus. It is
certified:
ATEX Code: Ex II 1 G
Cenelec Code: EEx ia IIC T5
IF800Ex Interface Module
The Intrinsically Safe IF800Ex Interface Module is designed to monitor fire contacts such as extinguishing
system controls, ventilation controls, fire door controls etc.
The IF800Ex is contained within a grey compression moulded glass filled polyester box with 3 x 20 mm cable
gland holes. The electronic components are mounted on a double sided printed circuit board built into a
potted module formed from a plastic moulding. Connectivity is via two terminal blocks fitted to the PCB.
The interface module is designed to comply with EN 50 014 and EN 50 020 for intrinsically safe apparatus. It
is certified:
ATEX Code: Ex II 1 G
Cenelec Code: EEx ia IIC T5
EXI800 Interface Module & Galvanic Isolator
The EXI800 Interface Module, used with a galvanic isolator, provides a path for an MX Panel to transparently
communicate to slave devices (800Ex Detectors, IF800Ex Interface Module or CP840Ex Addressable Break
Glass Callpoint) connected to the Intrinsically Safe loop. The interface reduces the standard MX loop supply
voltage and signalling currents to levels that are acceptable for hazardous areas.
The EXI800 can detect a short circuit on the left-loop, the right-loop, or the IS loop and will isolate the
offending loop connections from the other loop connections.The IS loop output of the EXI800 interfaces with the Pepperl+Fuchs KFD0-CS-Ex1.54 Galvanic Isolator,
supplying loop voltage and signalling currents to the Intrinsically Safe loop.
I.S. Barrier Enclosures
A range of polycarbonate enclosures to suit the sounder driver, EXI800 and the Galvanic Isolator. The
enclosures provide see-through lids and can accommodate barriers in the safe area.
The enclosures are impact resistant, flame retardant and dustproof to IP65.
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or service without notice
Technical Information
To preclude the risk of an explosion, equipment in the Hazardous Area
must not be capable of causing ignition under normal operating, or
specific fault conditions. Limiting the energy which can be stored in,
and released by the electronic circuitry and cables in the Hazardous
Area is achieved by using Intrinsically Safe equipment and by placing
restrictions on the cable parameters.
Intrinsic safety is a technique for ensuring that the electrical energy and
temperature rise occurring during normal operation and during all
probable fault conditions are not able to cause ignition.
Intrinsic safety relies on limiting the voltage and current in the circuit so
that if a fault occurs the power available in the circuit is insufficient to
cause ignition.
To complete the explosion protection concept of a circuit a Safety
Barrier must be connected between the Hazardous
Area equipment and the source of power in the Safe Area. The
electrical power which may be supplied or drawn from a Safe Area (i.e.
an area with no definable hazard) is limited by using Galvanic Isolators
or Isolating I.S. Interface Units.
The main advantage of intrinsic safety over other methods of
protection is the fact that the majority of maintenance operations can
be carried out whilst the system is live.
Intrinsically Safe Systems
System 800 ATEX Certificate: BAS01ATEX1394X
The System 800 ATEX system certificate allows the M800 Ex MX
Digital addressable fire sensors to be fitted into category 'ia' for gas
group IIC in Zone 0, Zone 1 and Zone 2 hazardous areas.
HazardousArea
Wiring
Barrier Enclosure
SafeArea
Wiring
T2000
Detectors
Callpoint
Sounder
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SECTION 1.5
CALL-POINTS and ANCILLARIES
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MINERVA Marine
800 Series Ancillary Equipment
Features:
Dramatically reduces cabling costs by using
these modules
For passenger ships incorporates loop
powered sounders
Reduced cabling costs for ventilation shut
down, fire door, fire damper monitoring and
control and sprinkler monitoring
Higher systems integrity through continuous
monitoring
800 Series Ancillary Equipment
An extensive range of ancillary modules has been
specifically designed for use with the MX/T2000
range of Fire Controllers.
The 800 range of ancillary modules provide the MX
Fire Controller with a wide degree of systems applica-
tion flexibility. This allows the field addressable loop
from the control panel to both receive inputs to the
system and control outputs from it.
This broad range of modules allows the scope of the
fire detection system to be significantly extendedbeyond a simple fire detector alarm sounder based
alarm system.
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The command modules enable fire doors to be closed, fire dampers to be controlled, plus provide an interface to shut down HVAC and other plant
control equipment. With the high systems integrity offered on the MX Controller the command modules can also be used to control a public
address based evacuation system.
The CIM800 is a flexible addressable input-monitoring device that fits in the standard ancillary
housings.
The CIM800 provides a single input to current MX panels though this can be implemented as
two separately wired spurs (Style B) or as a loop (Style A). Both spur and loop input wiring can
be configured to monitor normally open or normally closed inputs. In addition both can be
configured to initiate an alarm or short circuit fault message in the event of a short circuit on
normally open monitoring circuits.
The DIM800 is designed to power and monitor a circuit of low voltage conventional detectors
and callpoints. The detection circuit is powered from an external 24V d.c. supply and is reset by
the MX addressable panel. The DIM800 monitors the external 24V d.c. and provides a fault
signal if it is lost. The input detection circuit can be wired as one or two spur circuits (Class B),
one loop configured circuit (Class A) or one 4 wire detection circuit.
The DIM800 is designed to be compatible with most conventional detection products.
Compatibility has been tested to date on the following products:
Compatible Thorn detectors:
M300 Series , M600 Series , S100 Series, H Series, S231F, S231F+, CP200
The RIM800 provides a single programmable relay output from the MX DIGITAL addressable
loop which can be programmed for a variety of applications including signalling fire conditions
to plant, machinery, fire doors, dampers & security systems.
The RIM800 relay coil is monitored. The RIM800 relay contact is rated for 2A @ 24V d.c. but
can be used to switch mains voltage when used with the HVR800.
CIM800 Contact Input Module
DIM800 Detector Input Module
RIM800 Relay Interface Module
The MIO800 is a general purpose interface module for use with MX TechnologyTM
fire detection
systems. It allows multiple input and output connections to be made between external
equipment and the MX Digital loop. Three inputs and four outputs are provided. Each input and
output can be programmed independantly using the MX Consys configuration tool to provide
customised functionality.
An IP55 rated D800 style housing is used as the standard enclosure with the option of a DIN-
Rail mounting kit for in-cabinet installations.
MIO800 Multi Input Output Module
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The SNM800 is a remote addressable sounder circuit output device capable of switching
sounder and speaker circuits up to 2A @ 24V d.c. or provide a monitored output facility for othe
applications. These can be used in addition to the two sounder circuits provided as standard on
most MX detection panels.
The SNM800 can support sounder circuits wired as a spur (Class B Style Y) or in a loop
configuration (Class A Style Z).
The SNM800 can be configured with a RIM800 to provide a secure monitored extinguishing
release solenoid control.
The TM520 provides an output that can be activated based on a delay time. If either the key-
switch on the module is activated, or a predefined event within the control panel occurs then a
timed delay (set between 10 minutes and 2 hours 10 minutes) is started. When the delay
reaches zero the TM520 output is activated. The unit sounds an internal buzzer and shows a
red LED when the output is active, and shows a yellow LED when the timer is counting down.
To provide a warning that the delay is nearly over, the red LED and the buzzer will pulse 5
minutes before the end of the delay .The TM520 requires a separate 24V DC supply to operate. The module is not addressable and
will therefore not take an address on the loop.
The APM800 is an MX addressable power supply monitoring module which is usually used
with the PSM800 power supply module to make an addressable power supply. The APM800 i
designed to fix to studs on the top of the PSM800.
The APM800 monitors the PSM800 for mains failure, earth fault, battery charger fault and
battery fault. It can reset the PSM800 resettable 24Vd.c. output and initiate a battery test which
then reports battery voltage and current to the controller.
The SB520 enables the SNM800 to drive sounder circuits with higher currents whilst
maintaining the reverse polarity integrity line monitoring.
The MIM800 is a small MX addressable module designed for monitoring a single input circuit.
The MIM800 can monitor normally open or normally closed inputs and provides open and shor
circuit monitoring of the line.
The MIM800 is designed for fitting in small devices such as flow switches, special detection
devices and explosion proof callpoints. A variant of the MIM800 is used in all callpoints and
pullstations.
SNM800 Sounder Notification Module
TM520 Timer Module
APM800 Addressable Power Supply Monitor Module
SB520 Sounder Boost Module
MIM800 Mini-Input Module
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The HVR800 is a non-addressable device which allows a low current mains rated relay
to switch up to 10A. Alternatively a low voltage drive signal such as that provided by the
RIM800 or 80 way mimic can be used to switch the integral mains relay.
The CP820M is an indoor MX addressable manual callpoint with programmable status
LED. The CP820M is designed for LPCB approvals . The CP820M provides high speed
communication to the MX panel of a manual fire alarm.
The CP830M is an outdoor MX addressable manual callpoint with programmable status
LED. The CP830M is designed for LPCB approvals . The CP830M provides high speed
communication to the MX panel of a manual fire alarm.
HVR800 High Voltage Relay
CP820M Indoor Callpoint
CP830M Outdoor Callpoint
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The double gang mounting cover allows any of the 800 modulerange to be mounted individually onto a standard electrical double
gang backbox.
The mounting cover allows either surface or flush mounting.
The Ancillary Housing 8 can incorporate:
- 8 x standard 800 Ancillary modules
Additionally a stacking kit is available that doubles the number of
modules that can be accommodated within the Ancillary 8 housing.
The Ancillary Housing 3 is a low cost polycarbonate housing that can
incorporate:
- 3 x standard 800 Ancillary modules
The D800 Ancillary Housing is a surface mount IP55 polycarbonate
housing which will accomodate any one of the 800 module range
except for the APM800/MIM800/TM520.
Double Gang Mounting Cover
Ancillary Housing 8
Ancillary Housing 3
D800 Ancillary Housing
MX Ancillary Module Housings
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or service without notice
MX Ancillary Module Technical Look-Up Table
Module No. Of No. Of Output No Of Powered Operating Operating Dimensions
Inputs Outputs Rating Addresses From Temperature Humidity (mm)
Used
CIM800 2 N/A - 1 Loop -25C to +70C
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SECTION 2
GAS DETECTION SYSTEM
EQUIMENT DATA SHEETS
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SECTION 2.1
GAS DETECTION SYSTEM
GAS MONITOR PLUS
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Gasmonitor Plus
Fixed systems for gas and fire monitoring
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Gasmonitor Plus is our flexible microprocessor controlled
system designed with a modular approach, so you get exactly
what you want.
Used throughout the world, both on and offshore, Gasmonitor Plus
provides the cost effective solution to your system requirements.
Gasmonitor Plus, the gas and fire control system you can trust.
Simple to use
Gasmonitor Plus offers flexibility whilst still providing
simple operation.All the day to day functions
are accessible via push buttons on the
front panel.
As well as a rolling display, indicating the channel
currently monitored, each channel has a bar graph
display. This unique bar graph format is ranged
to indicate readings below the first alarm setting,
providing an instantaneous representation
of the gas concentration on every detector.
Common alarm LEDs on the display card and
individual alarms on the panel only light when a
hazard or fault is detected. This meansthe whole
rack status can be checked at a glance.
Ground breaking design
Gasmonitor Plus is a microprocessor based expandable
control system, which can be multiplied to offer
unlimited channels and outputs.
Its modular construction provides ultimate
customisation capacity with minimal wiring.
Gasmonitor Plus has industry standard analogue
outputs, and the mechanical design is based on 19
Eurorack. This means that the Gasmonitor Plus
will integrate fully with existing rack
mounted protection systems on site.
The alochrome finish and rack screening plates
ensure that the Gasmonitor Plus is impervious to
radio frequency interferance.
Flexible architecture
Each channel has three levels of alarm as wellas a dedicated analogue output, set as 4-20
mA as standard.
Optional relay modules can interface to the panel to
provide up to a total of 84 output relays per
rack. Sixteen of these relays can be configured/
voted from a combination of the three levels of alarm
per channel.
The RS232 digital interface provides connectivity
with PC for configuration, monitoring and datalog
upload. Each rack is uniquely addressable, making
multi-drop architectures possible. This cuts down on
configuration and monitoring cabling.
Easy maintenance
Gasmonitor Plus has been designed witheasy servicing and maintenance in mind.
Each channel is inhibited separately so that
plant safety is not compromised during
maintenance checks.
Routine calibration can be achieved from the front
panel. The one man calibration feature reduces the
service overhead by half.
One universal gas card architecture controls all gas
detectors. This reduces the spares holding
required for Gasmonitor Plus maintenance. Each
control card is fitted with its owndedicated micro-controller so it can
function independently in the event of a single
Gasmonitor Plus
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Large, clear display Individual channel
alarm inhibits
Analogue outputs per
channel
4-20mA or 1-5Vdc
Common and individual
channel relays for levels 1, 2,
3 and Fault
Optional voted relays
Industry-standard
gas detectors
Remote reset switch Dedicated external audio/
visual alarm drive
Up to 20 smoke/heat
detectors per zone
Optional
Battery
Backup
AC/DC
Power
Options
Common alarm indicators
Universal gas
input cards
Unique
bargraph
reading per
channel
Channel alarm
indication
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Gasmonitor Plus
Size 483 x 133 x 294 mm
(19.0 x 5.25 x 11.5 ins)
Weight 9.5 kg (21 lbs)
Enclosure material Aluminium alloy
Mounting Rack mounted (3u format)1
Channels 16 per rack
Inputs Gas 2 or 3 wire, 4-20 mA
(sink or source), or mV bridge
Fire - Smoke detectors, heat Maximum of 32 loops per rack
detectors and manual call points, (i.e. 16 twin zone fire modules)
up to 20 per loop
Outputs Analogue 16 x 4-20mA,
max. load 960 Ohms
or 1-5 V, min. load 100 Ohms
External audio/visual alarm drive Powered 24 V dc, max load
up to 200mA for each alarm level
Relays Type Up to 84 DPCO
contacts rated 5 A @ 250 V ac,
non-inductive load
Assignment - common Alarm 1, Alarm 2, Alarm 3, Fault
- per channel Gas alarms 1, 2 & 3, fire & fault
- voting Up to 16, configurable
Relay modes energised, de-energised & latching, non-latching
Digital Communications DCS/PLC/PC/Local configuration link RS232
Logging Built-in datalogger
- data available viacommunication links
Panel indication Channel number 4 lines x 20 characters back-lit LCD display
Gas reading as above plus green LED bar-graph
Measurement units ppm, %LEL, %vol, fire
System fault yellow LED
Alarm indication Audible-internal sounder
Visual - alarm 3 individual & 3 common alarms (red LED)
- fault individual & common fault (yellow LED)
- inhibit individual inhibit (yellow LED)
Power AC mains 100 - 260 V ac 50/60 Hz external
DC 27.6 V dc,
Battery backup External
Remote Accept/Reset
Lamp test
Approvals Low voltage directive Meets BS EN 61010-1
RF immunity Meets EN 50082-1
RF emissions Meets EN 50081-1
Operating Temperature 0 to +50oC (32 to 122oF)
Humidity 0 - 95% non-condensing
1. Wall mounted and floor standing cabinets are optional, dimensions on request.
P05003 Issue 7 05/
UK OfficeCrowcon Detection Instruments Ltd2 Blacklands Way
USA OfficeCrowcon Detection Instruments Ltd21 Kenton Lands Road
Rotterdam OfficeCrowcon Detection Instruments LtdVlambloem 129
Singapore OfficeCrowcon Detection Instruments LtdBlock 194 Pandan Loop
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SECTION 2.2
GAS DETECTION SYSTEM
TXGARD FIXED DETECTORS
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1.1 Product overview
TXgard-Plus is a flameproof toxic and oxygen gas detector
suitable for use in zone 1 or 2 hazardous areas. It is designed to detect
the following gases when fitted with the appropriate electrochemical
sensor:
Gas Range Type
H ydrogen sulphide 025 ppm Toxic
C arbon m onoxide 0250 ppm Toxic
Am m onia 050 ppm Toxic
O xygen 025% vv O xygen
Sulphur dioxide 010 ppm Toxic
A local display and magnetically operated switches allow non-
intrusive one-man calibration without a hot work permit. Powered by
24 V dc (nominally) TXgard-Plus provides a 4-20 mA signal (sink or
source) proportional to the gas concentration and can also be fitted
with optional alarm and fault relays.
1.2 Product description
TXgard-Plus com prises four parts; 96H D sensor housing, junction box, am plifier
and term inal board. D iagram 1 details TX gard-Plus. The overall assem bly is
certified EEx d IIC T6 in E urope and C lass 1 , Zones 1&2 A Ex d IIC T6 in the U SA.
The 96H D sensor housing is a m odular stainless steel assem bly that
dism antles to allow plug-in sensors to be replaced easily (see D iagram 4). The
assem bly screw s into an M 20 entry on the junction box.
The junction box is m anufactured from m arine grade alloy and is supplied
w ith 2 x M 20 (1/2N PT for USA) cable entries for custom er use. Alternative cable
entries are available from C row con.
The am plifier plugs into the term inal board, and is held in place by tw o
captive screw s. The am plifier provides pow er to the sensor, local display and
controls, and a 4-20 m A signal proportional to the gas concentration for connection
to a control panel. To rem ove, turn screw s anti-clockw ise and use them to pull
am plifier out of the enclosure.
All electrical connections are m ade via the term inal board m ounted in the
base ofthe junction box (see D iagram 2) O ptionalalarm relays (AL1 & AL2)and one
TXgard-PlusFlam eproof
Toxic and O xygen
G as D etector
w ith N on-intrusive O ne-m an C alibration
1. INTRODUCTION
Instructions
TAMPER PROOFGRUB SCREW(1.5mm ALLEN KEY
STEADY ONINDICATESZERO/ CALMODEACTIVATED
EXTERNALEARTH POINT
"UP"
M20 (1/2" NPT)CABLE ENTRY
UNITS
M20 (1/2" NPT)CABLE ENTRY
115 (41/2")
HEIGHT = 115 (41/2")
All dimensions in mm unless otherwise stated
83 (31/4")
200(8")
135(55/16")
LOCALDISPLAY
FLASHINGINDICATES4-20mA/RELAYSINHIBITED
ALARM 1 & 2ADJUSTMENTPOTS
4 OFFFIXING HOLESO 6mm (1/4")
STATUSLED
"DOWN"
ppm
TXgard-Plus
Relay version only
1.3 Status Indication
TXgard-Plus includes a local display and status LED , visible through
the junction box w indow , see D iagram 1. The display show s the gas
concentration and current m ode of operation ie. N O RM AL, ZER O or C AL.
The LED show s the current alarm state of the detector. This is sum m arised in
Table 1.
Operational LED Relay Comment*
state indication states*
Normal S teady green A L1 - O ff G as level < A L1
operation AL2 - O ff Current output = 420 m A
FAU LT - O n
Normal Steady red AL1 - O n AL1 < gas level < AL2
operation AL2 - O ff Current output = 420 m A
(alarm 1) FAU LT - O n
Normal Flashing red AL1 - O n G as level > AL2
operation AL2 - On Current output = 420 m A
(alarm 2) FAU LT - O n
Over-range Flashing red AL1 - On Gas level > full scale
AL2 - O n Display backlight flashes
FAULT - O n Current output = 24 m A
Zero/calibration Flashing green C onfiguration Latched until reset by M EN U
mode dependent Current output = 2 m A
(see section 2) (4 m A option)
Detector S tead y am b er A L1 - O ff C urrent outp ut = 0 m A
fault AL2 - Off
FAU LT - O ff
*See section 2 for AL1 and AL2 standard settings
Table 1: LED status indicator summary.
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2. DETECTOR CONFIGURATION
Table 3 details standard alarm points for the available gases and ranges.
Gas Range* AL1* AL2*
Hydrogen sulphide 025 ppm 10 ppm 20 ppm
Carbon monoxide 0250 ppm 30 ppm 100 ppm
Ammonia 050 ppm 10 ppm 25 ppm
Oxygen 025% vv 19% vv 17% vv
Sulphur dioxide 010 ppm 2 ppm 5 ppm
* Alternative ranges and alarm set points m ust be specified w hen ordering
Table 3: Standard ranges and alarm set points.
Location of links are show n in D iagram 2.
2.2 420 mA options
To change current source output to sink, set sw itch to SKposition.
To change Inhibit from 2 m A to 4 m A, fit link to 4position.
2.3 Relay opt ions
To change A L1 or AL2 relay from N O to N C , fit link in the N Cposition.
To change FAU LT relay from N C to N O , fit link in the N Oposition.
2.4 Inhibit options
To not inhibit 4-20 m A signal and relays, fit link to Nand link to 4.
3. INSTALLATION
Diagram 2: Terminal and amp lifier layouts
CONTACTREVERSINGLINKS
TO96HDSENSOR
4-20mA
10-30V
0V
RL3
RL2
RL1
ALARM 21
2
4SENSOR
5
6
3
OXYGEN
OUTPUTSK SR
OTHER
CONTROLEQUIPMENT
ALARM2
RELAYCONTACTS
INTERNAL TERMINAL LAYOUT
= ALARM RELAY VERSION ONLY
REAR VIEW OF
AMPLIFIER
FAULT
ALARM1
ALARM
4mA
OUTPUT OPTIONS
TEST
POINT
40-200 mV
INHIBIT
N Y
17 4 2
GAS
RANGE
ALARM
ALARM 1
7
8
9
10
11
12
ISOLATE0V
GND
NC
NO
NC
NO
NO
NC
GNDISOLATELINK
ALARM1
FAULT
ALARMSET POTS
USED FOROXYGEN TXGARD.FOR TOXIC LINKSET TO OTHER
2.1 Standard configurationAs standard, TXgard-Plus is factory set as follow s:
Current source with 0 m A = Fault
2 m A = Inhibit ie. Zero/C al m ode
4-20 m A = N orm al operation
24 m A = Over-range clam p
AL1 relay (if fitted) Alarm level 1, see Table 3
N orm ally de-energised, energising on alarm
Contact norm ally open (N O ), closing on
alarm
AL2 relay (if fitted) Alarm level 2, see Table 3
N orm ally de-energised, energising on alarm
Contact norm ally open (N O ), opening on
alarm
FAULT relay (if fitted) N orm ally energised, de-energising on fault
Contact norm ally closed (N C ), opening on
fault
Alarm /fault relays autom atically reset w hen alarm or fault has cleared.
INHIBIT N orm ally selected. ie. w hen C AL/ZER O
selected current output is forced to 2m A
and relays are held in norm al/no alarm
state.
WARNING
TXgard-Plus is designed for use in Zone 1 and 2 hazardous areas and
is certified EEx d IIC T6 (AEx d IIC T6 in USA). Installation must be in
accordance with the recognised standards of the appropriate authority
in the country concerned. For more information contact Crowcon.Prior to carrying out any work ensure local regulations and site
procedures are followed.
3.1 Location
There are no rules w hich dictate the siting and location of detectors, how ever,
considerable guidance is available from B S6959:1988 British S tandard
C ode of Practice for the Selection, Installation, U se and M aintenance of
Apparatus for the D etection and M easurem ent of C om bustible G ases. In the
U SA refer to the N ational Electrical C ode (N EC 1999). Sim ilar international
codes of practice m ay be used w here applicable. In addition certain regulatory
bodies publish specifications giving m inim um gas detection requirem ents for
specific applications.
The detector should be m ounted w here the gas is m ost likely to be
present. The follow ing points should be noted w hen locating gas detectors:
To detect gases w hich are lighter than air e.g. am m onia, detectors should
be m ounted at high level and C row con recom m end the use of a C ollector
C one,Part No. C01051.
To detect heavier than air gases e.g. sulphur dioxide, detectors should be
m ounted at low level.
W hen locating detectors consider the possible dam age caused by natural
events eg. rain or flooding. For detectors m ounted outdoors C row con
recom m end using a W eatherproof C ap,Part No. C01442.
C onsider ease of access for functional testing and servicing.
C onsider how the escaping gas m ay behave due to natural or forced air
currents. M ount detectors in ventilation ducts if appropriate.
C onsider the process conditions Am m onia is norm ally lighter than air but
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D etector placem ent should be determ ined follow ing advice of experts
having specialist know ledge of gas dispersion, the plant processing equipm ent as
w ell as safety and engineering issues. The agreement reached on the
locations of sensors should be recorded.C row con w ould be pleased to assist
in the selection and siting of gas detectors.
3.2 Mounting
The m ounting detail of TX gard-Plus is given in D iagram 1. TXgard-Plus should
be installed at the designated location w ith the detector pointing dow n. This
ensures that dust or water w ill not collect on the sinter and stop gas entering
the detector.
3.3 Cabling Requirement
C abling to TXgard-Plus m ust be in accordance w ith the recognised
standards of the approp riate authority in the country concerned and m eet the
electrical requirem ents of the detector. C row con recom m end the use of steel
w ire arm oured (SW A) cable and suitable exp losion proof glands m ust be
used. Alternative cabling techniques, such as steel cond uit, m ay b e
acceptable provided approp riate standards are m et.
TXgard-Plus requires a dc supply of 10-30 V at up to 100 m A.
Ensure the m inim um dc supply of 10 V is ob served at the detector, taking into
account the voltage drop due to cable resistance.
For exam ple, a nom inal dc supply at the control panel of 24 V has a
guaranteed m inim um supp ly of 18V. The m axim um voltage d rop
allow ed is therefore 8V. TXgard-Plus can dem and up to 100 m A and so the
m axim um loop resistance allow ed is 80 O hm s. A 1.0 m m 2 cable w ill typically
allow cable runs up to 2000 m . Table 4 show s m axim um cable distances
given typical cable param eters.
CSA Resistance (Ohms per km) Max. distance
mm2(awg) Cable Loop m (ft)
1.0 (17) 18.1 36.2 2000 (6560)
1.5 (15) 12.1 24.2 3000 (9840)
Table 4: Maximum cab le distances for typical cables
Acceptable cross sectional area of cable is 0.5 to 1.5 m m 2. Table 4 provides
guidance only, actual cable param eters for each application should be used to
calculate m axim um cable distances.
3.4 Electrical Connections (4-20mA use)
All connections are m ade via the term inal board m ounted in the base of thejunction box (see D iagram 2). The 3 w ires from the 96H D are colour coded
and should be term inated in the corresponding colour coded term inal
(term inals 4, 5 & 6). Term inals 1 (0 V dc), 2 (10-30 Vdc) and 3 (4-20m A signal)
are connected to the control equipm ent. TXgard-Plus is factory set as a 4-
20 m A source d evice unless specified otherw ise w hen ordering (see Section
2 to change configuration). D iagram 3 sum m arises the electrical
connections.
Note: The junct ion box and cable armour must b e earthed at the
detector and control panel to l imit the effect of radio frequency
interference and to maintain electrical safety.
All electrical connections to the optional relays are m ade via the 6-way
term inalblock num bered 7 to 12 on the term inalboard in the base of the
4. OPERATION
WARNING
Prior to carrying out any work ensure local regulations and site
procedures are followed.
Never attempt to open the detector or junction box when flammable
gas is present.
Ensure that the associated control panel is inhibited so as to prevent
false alarms.
4.1 Commissioning Procedure
a. O pen the junction box of the detector by loosening the tam per proof grub
screw and rem oving the lid by rotating it anti-clockw ise.
b. R em ove the am plifier and check that all electrical connections have been
m ade and are correct as per D iagram 3.
c. R eplace the am plifier and close the junction box ensuring that all screw s
have been re-fitted correctly.
d. Apply pow er to the detector. The status LED w ill show a steady green
indicating norm al operation.
e. Leave the detector to stabilise for 1-2 hours.
Zeroing the detector (ZERO Mode):
f. Place the end of C R O -M agover the M EN U. G reen S tatus LED w ill flash.
D ecim al point above ZER Ow ill illum inate. D isplay backlight w ill illum inate.
D ecim al point above IN H IB ITm ay flash if the option has been internally
selected.
g. W ith no target gas present at the detector, place the end of the C R O -
M agkey over the U Por DO W Narrow pads to m ake the display read
zero.
Note: Oxygen detectors may be zeroed in fresh air
Calibrating the detector (CAL mode):
h Place the end ofC R O -M agoverthe M EN U pad The decim alpointabove
CO NTRO L EQUIPM ENT
SAFE AREA
CO NTRO L EQUIPM ENT
SAFE AREA
+V 0 V
S O U R C E
1030V
1030V
420mA
420mA
0V
0V
TXG ARD -PLU S TXG ARD -PLU S
SIN K
+V 0 V
2 3 1 2 3 1
Diagram 3 : Electrical connec tions to TXgard-Plus
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(contact Crow con for the supply of calibration gas.)
j. Allow the gas reading to stab ilise.
k. Place the end of the C RO -M agover the UPor D O W Narrow pads to
m ake the display read the correct concentration.
l. If the control equipm ent display requires adjustm ent consult the operating
m anual for the equipm ent.
Returning to normal op eration (NORMAL mo de):
n. Place the end of C RO -M agover the M EN Upad. All decim al points w ill
disappear and the backlight w ill turn off. The green status LED w ill be on
steadily (assum ing no gas is present at the detector).
o. The detector is now operational.
Note: Always return the detector to NORMAL mode to avoid leaving
the detector in a permanently inhibited state.
4.2 Routine Maintenance
The operational life of the sensors depends on the application, frequency and
am ount of gas being seen. U nder norm al conditions (6 m onthly calibration
w ith periodic exposure to C AL gas) the life expectancy of the detectors are:
H ydrogen sulphide 18 to 24 m onths
C arbon m onoxide 18 to 24 m onths
Am m onia 24 m onths
O xygen 18 to 24 m onths
Sulphur dioxide 18 to 24 m onths
Site practices w ill dictate the frequency w ith w hich detectors are
tested. C row con recom m end detectors are gas tested at least every 6 m onths
and re-calibrated as necessary follow ing the steps given in 4.1.
4.3 Sensor Replacement / Servicing of Detectors
WARNING
This work should be carried out by Crowcon or an approved service
centre unless suitable training has been received.
TXgard-Plus uses the 96H D sensor housing w hich allow s the user to replace
the sensors, gaskets and sinter if necessary. An exploded view of the 96H D
sensor housing is given in D iagram 4. The follow ing procedure m ay be
follow ed w hen servicing a TXgard-Plus detector.
a. Sw itch off and isolate pow er to the detector requiring attention.
b. O pen the junction box of the detector by loosening the tam per proof grub
screw and rem oving the lid by rotating it anti-clockw ise.
c. R em ove the am plifier.
d. D isconnect the 3 sensor w ires from the term inal board (term inals 4, 5 & 6).
e. U nscrew the com plete 96H D sensor housing from the junction box.
Note: If a spare 96HD sensor housing complete with new sensor is
available ignore steps f to k and return the old 96HD to Crowcon or an
approved service centre for repair.
f. O pen the 96H D sensor housing by rem oving the four Allen head screw s
from the Top C ap w ith a 3m m Allen key.
g. Rem ove the sensor from the Top C ap P C B .
h. Fit the replacem ent sensor checking the part num ber is correct. This part
num ber is labelled on the m ain body of the detector.
i. Inspect the gaskets and replace if necessary.
j. The sinter assem bly w ill only need to be replaced if it has becom e blocked
by dust or oil. Such blockage causes the response tim e of the detector to
be slow and m ay affect sensitivity. To rem ove the sinter a rem oval tool (Part
# M 01614) is required. Loctite N o 243 m ust be used on the sinter
assem bly threads to m aintain certification
l. Fit the 96H D sensor housing to the junction box ensuring that the colour
coded w ires are term inated correctly.
m. R eplace am plifier ensuring the captive screw s are fastened securely.
n. Sw itch on pow er.
0. C lose the junction box rem em bering to fasten the tam per proof grub
screw into position.
p. Follow the C om m issioning Procedure given in 4.1.
4.4 Changing Alarm Levels (Relay Version Only)
WARNING
This work should be carried out by Crowcon or an approved service
centre unless suitable training has been received. Before attempting
to change alarm levels ensure the detector is in fresh air and no
flammable gas is present.
Alarm levels are factory set as detailed in Table 3. To change either level:
a. Sw itch off and isolate pow er to the detector requiring attention.
b. O pen the junction box of the detector by loosening the tam per proof
grub screw and rem oving the lid by rotating it anti-clockw ise.
c. Rem ove the am plifier from the term inal board.
d. Ensure that the IN H IB ITlink is set to N.
e. Re-fit the am plifier to the term inal board ensuring that all screw s have
been secured correctly.
f. Apply pow er to the detector and allow the detector to stabilise.
g. Place the end of C R O -M agover the M EN Upad. The decim al point
above the w ord ZER O w ill illum inate, the Status LED w ill flash green and
the display backlight will illum inate.
h. W ith clean airpresent atthe detector,place the end of the C RO -M ag
4 OFF M 4 X 12 m mA LL EN H E A D S C R E W S
T O P C A P A N D S E N S O R P C B
N E O P R E N E G A S K E T 1
(Part N o. M 044 52)
S E N S O RGASK ET 2
(Part N o. M 0412 8)
M A IN B O D Y
SINTER ASSEM BLY
(Part N o. S017 81)
SIN TER
Diagram 4: 96HD assembly
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5. SPARE PARTS AND ACCESSORIES
Please refer to the Sensor R eplacem ent Label m ounted on the outside of
the 96H D housing for the correct replacem ent part num ber.
Description Part no.
Complete 96HD senso r Senso r
housing with sensor only
H ydrogen sulphide (96H D/H S) S01750 E01229
C arbon m onoxide (96H D /C O ) S01751 E01344
Am m onia (96H D /AM ) S01752 E01618
O xygen (96H D /O X) S01753 E01488
Sulphur dioxide (96H D SO ) S01901 E01232
M 20 to 1/2N PT adaptor M 02125
M 20 to 3/4N PT adaptor M 02281
C eiling m ounting bracket M 01401
C ollector cone C 01051
W eatherproof cap C 01442
Sinter rem oval tool M 01614
Sinter assem bly S01781
G asket 1 M 04452
G asket 2 M 04128
Am plifier - toxic version S01866
Am p lifier - oxygen version S01867
Term inal board S01846
Relay board S01847
C alibration gas C ontact C row con
Loctite no. 243 C ontact C row con
89/336/EECThis product has been tested and found to com ply w ith the European D irective on EM C 89/336/EEC
Crowcon Detection Instruments Ltd, 2 Blacklands Way, Abingdon Business Park, Abingdon, Oxfordshire OX14 1DY, UK
Tel: +44 (0)1235 553057, Fax: +44 (0)1235 553062, email: [email protected], internet: http://www.crowcon.com
6. SPECIFICATION
Dimensions 200 x 115 x 115 m m (8x 41/2x 41/2)
Weight 2.2 kg (4.8 lbs)
Material 96H D sensor housing: 316 S tainless steel
Junction box: M arine grade alloy
Temperature range -1055C (14131F)
Humidity range 099% RH , non condensing
Ingress protection IP66 w ith w eatherproof cap
Explosion protection Flam eproof
Approval codes C EN ELEC EEx d IIC T6
U L C lass 1, Zones 1 & 2, AEx d IIC T6
Standards EN 50014, EN 50018, U L2279
Zones 1 and 2
Gas groups IIA, IIB and IIC
Operating voltage 1030 Vdc
Operating current Relay version:100 m A (m axim um )
Non-relay version:50 m A (m axim um )
Detector output 420 m A source or sink selectable
0 m A = Fault
2 m A = Inhibit (4 m A option)
420 m A = 0100% LEL
24 m A = O ver range
Relay outputs 2 x A larm relays SP N O (SPN C option)
1 x Fault relay SPN C (SPN O option)
Contact rating 1 A @ 30 Vdc
i. U sing a long instrum ent screw driver, turn the relevant ALA RM SET pot
m ounted on the term inal board (see D iagram s 1 & 2) to adjust the alarm
level. Tripping of the ALA R M 1 level relay is confirm ed by the status LED
turning a steady red. Tripping of the ALA RM 2 level relay is confirm ed by
the Status LE D flashing red.
j. O nce the alarm level has been set, place end of C R O -M agover the UP
or DO W Narrow pads and reset the display to read zero.
k. Place the end of the C RO -M agover the M EN Upad to return the
detector to norm al operation, ie. N o decim al points displayed, backlight
off and the Status LED indicating steady green.
l. C heck that the detector operates correctly by applying test gas as
necessary.
m. Sw itch off and isolate pow er to the detector.
n. R eset jum pers w hich m ay have been changed in step dabove.
o. R eplace the am plifier and close the junction box, ensuring that all screw s
have been re-fitted correctly.
p. Apply pow er to the detector and allow to stabilise before checking correct
operation.
q. R e-calibrate if necessary as per section 4.1.
NOTES
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SECTION 2.3
GAS DETECTION SYSTEM
FLAMGARD FIXED DETECTORS
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1.1 Product overview
Flamgard Plus is a flameproof flammable gas detector
suitable for use in zone 1 or 2 hazardous areas. It is designed to detect
flammable gas, present in ambient air, at concentrations not
exceeding the Lower Explosive Limit (LEL) of the target gas for which
it is calibrated. A local display and magnetically operated switches
allow non-intrusive one-man calibration without a hot work permit.
Powered by 24 V dc (nominally) Flamgard-Plus provides a 4-20 mA
signal (sink or source) proportional to the gas concentration and can
also be fitted with optional alarm and fault relays. For a list of
flammable gases that can be detected, please contact Crowcon.
1.2 Product descriptionFlam gard Plus com prises four parts; 96H D sensor housing, junction box, am plifier and
term inal board. D iagram 1 details Flam gard Plus. The overall assem bly is certified EEx d
IIC T6 in Europe and C lass 1 , Zones 1& 2 AEx d IIC T6 in the U SA.
The 96H D sensor housing is a m odular stainless steel assem bly that
dism antles to allow plug-in pellistor sensors to be replaced easily (see D iagram 4). The
assem bly screw s into an M 20 entry on the junction box.
The junction box is m anufactured from m arine grade alloy and is supplied w ith
2 x M 20 (1/2N PT for U SA) cable entries for custom er use. Alternative cable entries are
available from C row con.
The am plifier plugs into the term inal board, and is held in place b y tw o captive
screw s. The am plifier provides pow er to the pellistor sensor, local display and controls,
and a 4-20 m A signal proportional to the gas concentration for connection to a control
panel. To rem ove, turn screw s anti-clockw ise and use them to pull am plifier out of the
enclosure.
All electrical connections are m ade via the term inal board m ounted in the base
fth j ti b ( D i 2) O ti l l l (AL1 & AL2) d f lt l
Flamgard-PlusFlam eproof
Flam m able G as
D etector
w ith N on-intrusive O ne-m an C alibration
1. INTRODUCTION
Instructions
Diagram 1: Flamgard Plus g eneral arrangement
TAMPER PROOFGRUB SCREW(1.5mm ALLEN KEY
STEADY ONINDICATESZERO/ CAL
MODEACTIVATED
EXTERNAL
EARTH POINT
"UP"
M20 (1/2" NPT)CABLE ENTRY
UNITS
M20 (1/2" NPT)CABLE ENTRY
SET BRIDGE VOLTS POT 'A' SET BALANCE POT 'B'
115 (41/2")
HEIGHT = 115 (41/2")
All dimensions in mm unless otherwise stated
83 (31/4")
TEST POINTS 'A'
200(8")
135(55/16")
TEST POINTS 'B'
LOCALDISPLAY
FLASHINGINDICATES4-20mA/RELAYSINHIBITED
ALARM 1 & 2ADJUSTMENTPOTS
4 OFFFIXING HOLESO 6mm (1/4")
STATUSLED
"DOWN"
LEL
CONTACTREVERSINGLINKS
TO96HDSENSOR
4-20mA
10-30V
0V
RL3
RL2
RL1
ALARM 21
2
4SENSOR
5
6
3
OXYGEN
OUTPUTSK SR
OTHER
CONTROLEQUIPMENT
ALARM2
RELAYCONTACTS
INTERNAL TERMINAL LAYOUT
= ALARM RELAY VERSION ONLY
REAR VIEW OFAMPLIFIER
FAULT
ALARM1
ALARM
4mA
OUTPUT OPTIONS
TEST
POINT
40-200 mV
INHIBIT
N Y
17 4 2
GAS
RANGE
ALARM
ALARM 1
7
8
9
10
11
12
ISOLATE0V
GND
NC
NO
NC
NO
NO
NC
GNDISOLATELINK
ALARM1
FAULT
ALARMSET POTS
USED FOROXYGEN TXGARD.FOR FLAMGARDLINK SETTO OTHER
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2. DETECTOR CONFIGURATION
2.1 Standard configurationAs standard, Flam gard-Plus is factory set as follow s:
Current source with0 m A = Fault
2 m A = Inhibit ie. Zero/C al m ode
4-20 m A = N orm al operation
24 m A = Over-range clam p
AL1 relay Alarm level 1 set to 20% LEL
N orm ally de-energised, energising on alarm
C ontact norm ally open (N O ), closing on alarm
AL2 relay Alarm level 2 set to 40% LEL
N orm ally de-energised, energising on alarm
C ontact norm ally open (N O ), opening on alarm
FAULT relay N orm ally energised, de-energising on fault
C ontact norm ally closed (N C ), opening on fault
Alarm /fault relays autom atically reset w hen alarm or fault has cleared.
INHIBIT N orm ally selected. ie. w hen C AL/ZERO selected
current output is forced to 2m A and relays are held in
norm al/no alarm state.
Location of links are show n in D iagram 2.
2.2 4-20mA optionsTo change current source output to sink, set sw itch to SKposition.
To change Inhibit from 2 m A to 4 m A, fit link to 4position.
2.3 Relay opt ionsTo change A L1 or AL2 relay from N O to N C , fit link in the N Cposition.
To change FAU LT relay from N C to N O , fit link in the N Oposition.
WARNING
Flamgard Plus is designed for use in Zone 1 and 2 hazardous areas and
is certified EEx d IIC T6 (AEx d IIC T6 in USA). Installation must be in
accordance with the recognised standards of the appropriate authority
in the country concerned. For more information contact Crowcon.
Prior to carrying out any work ensure local regulations and site
procedures are followed.
3.1 Location
There are no rules w hich dictate the siting and location of detectors, how ever,
considerable guidance is available from BS6959:1988 British S tandard
C ode of Practice for the Selection, Installation, U se and M aintenance of
Apparatus for the D etection and M easurem ent of C om bustible G ases. In the
U SA refer to the N ational Electrical C ode (N EC 1999). Sim ilar international
codes of practice m ay be used w here applicable. In addition certain regulatory
bodies publish specifications giving m inim um gas detection requirem ents for
specific applications.
The detector should be m ounted w here the gas is m ost likely to b e
present. The follow ing points should be noted w hen locating flam m able gas
detectors:
To detect gases w hich are lighter than air e.g. m ethane, detectors should
be m ounted at high level and C row con recom m end the use of a C ollector
C one,Part No. C01051.
To detect heavier than air gases e.g. butane, detectors should be m ounted
at low level.
W hen locating detectors consider the possible dam age caused by natural
events e.g. rain or flooding. For detectors m ounted outdoors C row con
recom m end the use of a W eatherproof C ap,Part No. C01442.
C onsider ease of access for functional testing and servicing.
C onsider how the escaping gas m ay behave due to natural or forced air
currents. M ount detectors in ventilation ducts if appropriate.
C onsider the process conditions. B utane is norm ally heavier than air, but if
released from a process line w hich is at an elevated tem perature and/or
under pressure the gas m ay rise rather than fall.
The placem ent of detectors should be determ ined follow ing advice of
experts having specialist know ledge of gas dispersion, the plant processing
equipm ent as w ell as safety and engineering issues.The agreement reached
on the locations of sensors should be recorded. C row con would be
pleased to assist in the selection and siting of gas detectors.
3.2 MountingThe m ounting detail of Flam gard P lus is given in D iagram 1. Flam gard P lus
should be installed at the designated location w ith the detector pointing dow n.This ensures that dust or w ater w ill not collect on the sinter and stop gas
entering the detector.
3.3 Cabling RequirementC abling to Flam gard P lus m ust be in accordance w ith the recognised
standards of the approp riate authority in the country concerned and m eet the
electrical requirem ents of the detector. C row con recom m end the use of steel
w ire arm oured (SW A) cab le and suitable explosion proof glands m ust be
used. Alternative cabling techniques, such as steel cond uit, m ay be
acceptable p rovided appropriate standards are m et.
Flam gard P lus requires a dc supply of 10-30 V at up to 210 m A.
Ensure the m inim um dc supply of 10 V is observed at the detector, taking into
account the voltage drop due to cable resistance.
For exam ple, a nom inal dc supply at the control panel of 24 V has aguaranteed m inim um supp ly of 18V. The m axim um voltage drop
allow ed is therefore 8V. Flam gard P lus can dem and up to 210 m A and so the
i l i ll d i 38 O h A 1 5 2 bl ill i ll
3. INSTALLATION1.3 Status IndicationFlam gard Plus includes a local display and status LED , visible through the
junction box w indow . This is show n in D iagram 1.
The display show s the current flam m able gas concentration in the
range 0-100% LEL and current m ode of operation ie N O RM AL, ZER O or C AL.
The LED show s the current alarm state of the detector. This is sum m arised in
Table 1.
Operational LED 4-20mA Relay Comment*state indication outputs* states*
Normal Steady green 4 to 7.2m A AL1 - O ff 0 to 20% LEL
operation AL2 - Off
FAU LT - O n
Normal S teady red 7.2 to 10.4m A AL1 - O n 20 to 40% LEL
operation AL2 - Off
(Alarm 1) FAU LT - O n
Normal Flashing red 10.4 to 20m A A L1 - O n 40 to 100% LEL
operation AL2 - O n
(Alarm 2) FAU LT - O n
Over-range Flashing red 24m A (clam p ) AL1 - O n >100% LEL
A L2 - O n D isplay back-
FAULT - O n light flashes
Zero/calibration Flashing green C onfiguration C onfiguration Latched until
mode d epend ent d ep endent reset via M E N U
(see section 2) (see section 2)
Detector Steady am ber 0m A AL1 - O ff
fault AL2 - Off
FAU LT - O ff
*As standard, AL1 = 20% LEL and AL2 = 40% LEL
Relay version only
Table 1: LED status indicator summary.
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CSA Resistance (Ohms per km) Max. distance
mm2 (awg) Cable Loop m (ft)
1.0 (17) 18.1 36.2 1000 (3280)
1.5 (15) 12.1 24.2 1500 (4920)
Table 2: Maximum c able distances for typical cables
Acceptable cross sectional area of cable is 0.5 to 1.5 m m 2. Table 2 provides
guidance only, actual cable param eters for each application should be used to
calculate m axim um cable distances.
3.4 Electrical connect ions (4-20mA use)
All connections are m ade via the term inal board m ounted in the base of the
junction box (see D iagram 2). The 3 w ires from the 96H D are colour coded
and should be term inated in the corresponding colour coded term inal
(term inals 4,5 & 6). Term inals 1 (0 Vdc), 2 (10-30 Vdc) and 3 (4-20m A signal)
are connected to the control equipm ent. Flam gard Plus is factory set as a
4-20 m A source device unless specified otherw ise w hen ordering (see S ection
2 to change configuration). D iagram 3 sum m arises the electrical connections.
Note: The junction box and cable armour m ust be earthed at the
detector and control panel to limit the effect of radio frequency
interferenc e and to maintain electrical safety.
All electrical connections to the optional relays are m ade via the 6-way
term inal block on the term inal board in the base of the junction box (see
D iagram 2). The relay contacts are rated 1 A @ 30 Vdc.
CO NTROL EQUIPM ENT
SAFE AREA
CO NTROL EQUIPM ENT
SAFE AREA
+V 0 V
S O U R C E
1030V
1030V
420mA
420mA
0V
0V
FLAM G AR D -PLU S FLAM G AR D -PLU S
SIN K
+V 0 V
2 3 1 2 3 1
Diagram 3: Electrical connections to Flamgard Plus
WARNING
Prior to carrying out any work ensure local regulations and siteprocedures are followed.
Never attempt to open the detector or junction box when flammable
4.1 Commissioning Procedurea. O pen the junction box of the detector by loosening the tam per proof grub
screw and rem oving the lid by rotating it anti-clockw ise.
b. Rem ove the am plifier and check that all electrical connections have been
m ade and are correct as per Diagram 3.
c. Replace the am plifier and close the junction box ensuring that all screw s
have been re-fitted correctly.
d. Apply pow er to the detector. The status LED w ill show a steady green
indicating norm al operation.
e.Leave the detector to stabilise for 1-2 hours.
Zeroing the detector (ZERO Mode):
f. Place the end of C R O -M agover the M EN U. G reen S tatus LED w ill flash.
D ecim al point above ZERO w ill illum inate. D isplay backlight w ill illum inate.
D ecim al point above IN H IBITm ay flash if the option has been internally
selected.
g. W ith no flam m able gas present at the detector, place the end of the C R O -
M agkey over the UPor DO W Narrow pads to m ake the display read
zero.
Calibrating the d etector (CAL mod e):
h. Place the end of C RO -M agover the M EN U pad. The decim al point above
the w ord C AL w ill illum inate. O ther indications rem ain unchanged.
i. Apply calibration gas to the detector at a flow rate of 0.5 litres/m in.
C row con recom m end 50% LEL gas for calibration purposes (contact
C row con for the supply of calibration gas.)
j. Allow the gas reading to stabilise.
k. Place the end of the C R O -M agover the U Por DO W Narrow pads to
m ake the display read the correct concentration.
l. If the control equipm ent display requires adjustm ent consult the operating
m anual for the equipm ent.
Returning to normal operation (NORMAL mod e):
n. Place the end of C R O -M agover the M EN Upad. All decim al points w ill
disappear and the backlight w ill turn off. The green status LED w ill be on
steadily (assum ing no gas is present at the detector).
o. The detector is now op erational.
Note: Always return the detector to NORMAL mode to avoid leaving
the detector in a permanently inhibited state.
4.2 Routine MaintenanceThe operational life of the pellistor sensor depends on the application for which
it is being used. Such a d evice should w ork satisfactorily for up to 5 y