Crowcon Xgard Bright Manuel utilisateur

Taper
Manuel utilisateur
Xgard et Xgard IR Détecteurs de gaz,
Manuel de l'utilisateur et de l'opérateur,
M079910 issue 4 décembre 2020
Xgard und Xgard IR Gasdetektoren
Benutzer- und Bedienerhandbuch,
M079910 issue 4 Dezember 2020
Xgard y Xgard IR Detectores de gas
Manual del usuario y del operador,
M079910 issue 4 diciembre 2020
Xgard e Xgard IR Rilevatori di gas,
Manuale per utente e operatore,
M079910 issue 4 dicembre 2020
Xgard en Xgard IR Gasdetectors,
Handleiding voor gebruikers en operators,
M079910 issue 4 december 2020
Xgard i Xgard IR Detektor gazu,
Podręcznikużytkownikaioperatora,
M079910issue4grudzień2020
Xgard e Xgard IR Detectores de gás,
Manual do Usuário e Operador,
M079910 issue 4 dezembro 2020
M079910
Issue 4 December 2020
Xgard Bright
Gas Detectors with Display and Relays
User and Operator Manual
Xgard Bright
1
CONTENTS
1. DIAGRAMS ...........................................................................................7
1.1 Certification Labels ........................................................................7
1.2 Dimensions Diagram .....................................................................9
1.3 ExplodedView ............................................................................. 11
2. Introduction .........................................................................................14
2.1 ProductOverview ........................................................................14
2.2 Safety Information .......................................................................14
2.3 Storage instructions .....................................................................15
3. Installation ...........................................................................................16
3.1 Hazardous Area Use ....................................................................16
3.2 Location ........................................................................................16
3.3 Mounting ......................................................................................17
3.4 Internal Electrical Connections ....................................................17
3.5 General Cabling Requirement .....................................................18
3.6 Cabling Requirement 4 to 20 mA Current Loop ..........................18
3.7 Cabling Requirement Multidrop MODBUS ..................................19
3.8 Earthing requirements .................................................................23
4. OPERATION .......................................................................................24
4.1 Operation panel ...........................................................................24
4.2 Screen Indications .......................................................................24
5 Specification ........................................................................................26
Français
1. SCHEMAS ............................................................................................7
1.1 Marques de certification ................................................................7
1.2 Schéma des dimensions ...............................................................9
1.3 Vue éclatée .................................................................................. 11
2. Introduction .........................................................................................27
2.1 Vue d'ensemble du produit ..........................................................27
2.2 Informations de sécurité ..............................................................27
2.3 Storage instructions .....................................................................28
3. Installation ...........................................................................................29
3.1 Utilisation dans des zones dangereuses ......................................29
Xgard Bright
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3.2 Emplacement ................................................................................29
3.3 Installation ...................................................................................30
3.4 Branchements électriques internes .............................................31
3.5 Besoins de câblage d’ensemble .................................................31
3.6 Exigences de câblage -Boucle de courant 4 à 20 mA ...............31
3.7 Exigences de câblage - MODBUS multipoint ..............................33
3.8 Exigences de mise à la terre .......................................................37
4. UTILISATION ......................................................................................38
4.1 Panneau de commande ..............................................................38
4.2 Indications à l'écran .....................................................................38
5 Specification ........................................................................................40
Deutsch
1. KENNZEICHNUNGEN ..........................................................................7
1.1 Zertifizierungsetiketten ..................................................................7
1.2 Maßskizze .....................................................................................9
1.3 Explosionsansicht ........................................................................ 11
2. EINFÜHRUNG ....................................................................................41
2.1 Produktübersicht ..........................................................................41
2.2 Sicherheitsinformationen .............................................................41
2.3 HinweisezurLagerung ................................................................42
3. EINBAU ...............................................................................................43
3.1 Einsatz in Gefahrenbereichen ......................................................43
3.2 Standort ........................................................................................43
3.3 Montage .......................................................................................44
3.4 Interne elektrische Anschlüsse ....................................................45
3.5 Allgemeine Verdrahtungsanforderung ........................................45
3.6 Verdrahtungsanforderungen für die 4- bis 20-mA-Stromschleife 46
3.7 Verdrahtungsanforderungen Multidrop-MODBUS .......................47
3.8 Erdung .........................................................................................51
4. Betrieb .................................................................................................52
4.1 Bedienpanel .................................................................................52
4.2 Bildschirmanzeigen .....................................................................52
5. Technische daten ................................................................................54
Xgard Bright
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Español
1. DIAGRAMAS ........................................................................................7
1.1 Etiquetas de certificación ..............................................................7
1.2 Dimensiones Diagrama .................................................................9
1.3 Vista en despiece ........................................................................11
2. INTRODUCCIÓN ................................................................................55
2.1 Descripción detallada del producto .............................................55
2.2 Información de seguridad ............................................................55
2.3 Instrucciones de almacenamiento ...............................................56
3. Installation ...........................................................................................57
3.1 Uso en áreas peligrosas ..............................................................57
3.2 Ubicación .....................................................................................57
3.3 Montaje ........................................................................................58
3.4 Conexiones eléctricas internas ...................................................59
3.5 Requisitos generales de cableado ..............................................59
3.6 Requisitos de cableado para circuito de corriente de 4 a 20mA 60
3.7 Requisito de cableado Multidrop MODBUS ................................61
3.8 Requisitos de puesta a tierra ......................................................65
4. OPERACIÓN ......................................................................................66
4.1 Panel operativo ............................................................................66
4.2 Indicaciones de la pantalla ..........................................................66
5. ESPECIFICACIÓN ..............................................................................68
Italiano
1. SCHEMI ................................................................................................7
1.1 Etichette di certificazione ...............................................................7
1.2 Schema dimensioni .......................................................................9
1.3 Vista esplosa ...............................................................................11
2. INTRODUZIONE .................................................................................69
2.1 Panoramica del prodotto .............................................................69
2.2 Informazioni sulla sicurezza ........................................................69
2.3 Istruzioni per la conservazione ....................................................70
3. INSTALLAZIONE ................................................................................71
Xgard Bright
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3.1 Utilizzo in zone pericolose ...........................................................71
3.2 Ubicazione ...................................................................................71
3.3 Montaggio ....................................................................................72
3.4 Collegamenti elettrici interni ........................................................72
3.5 Requisiti generali di cablaggio .....................................................73
3.6 Requisiti di cablaggio ciclo di corrente da 4 a 20mA ..................73
3.7 Requisiti di cablaggio multidrop MODBUS ..................................74
3.8 Requisiti di messa a terra ............................................................78
4. FUNZIONAMENTO .............................................................................79
4.1 Pannello operativo .......................................................................79
4.2 Indicazioni sullo schermo ............................................................79
5. SPECIFICHE TECNICHE ...................................................................81
Nederlands
1. DIAGRAMMEN .....................................................................................7
1.1 Certificatielabels ............................................................................7
1.2 Afmetingendiagram .......................................................................9
1.3 Opbouwtekening .......................................................................... 11
2. INTRODUCTIE ...................................................................................82
2.1 Productoverzicht ..........................................................................82
2.2 Veiligheidsinformatie ....................................................................82
2.3 Opslaginstructies .........................................................................83
3. INSTALLATIE ......................................................................................84
3.1 Gebruik in een gevaarlijk gebied .................................................84
3.2 Locatie .........................................................................................84
3.3 Montage .......................................................................................85
3.4 Interne elektrische aansluitingen .................................................86
3.5 Algemene kabelvereisten ..............................................................86
3.6 Kabelvereisten 4 tot 20mA stroomlus ..........................................87
3.7 Kabelvereisten Multidrop MODBUS ............................................88
3.8 Aardingsvereisten ........................................................................92
4. BEDIENING ........................................................................................93
4.1 Bedieningspaneel ........................................................................93
4.2 Displaymeldingen ........................................................................93
5. SPECIFICATIE ....................................................................................95
Xgard Bright
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Polski
1. DIAGRAMY I SCHEMATY ....................................................................7
1.1 Etykiety certyfikacyjne ...................................................................7
1.2 Schematwymiarowy ......................................................................9
1.3 Widok rozstrzelony ......................................................................11
2. WPROWADZENIE ..............................................................................96
2.1 Opis produktu ..............................................................................96
2.2 Informacjeobezpieczeństwie .....................................................96
2.3 Instrukcjedotycząceprzechowywania ........................................97
3. INSTALACJA .......................................................................................98
3.1 Użytkowaniewobszarzeniebezpiecznym ..................................98
3.2 Miejsce instalacji ..........................................................................98
3.3 Montaż .........................................................................................99
3.4 Wewnętrznepołączeniaelektryczne .........................................100
3.5Ogólnewymogidotycząceokablowania ...................................100
3.6 Wymogidotycząceokablowaniapętliprądowejonatężeniu
od 4 do 20 mA ...........................................................................100
3.7 Wymogidotycząceokablowaniawsieciwielopunktowej
MODBUS ...................................................................................102
4. PRACA ..............................................................................................107
4.1 Panelobsługowy .......................................................................107
4.2 Wskazania na ekranie ...............................................................107
5. DANE TECHNICZNE ........................................................................109
Português do Brasil
1. FIGURAS ..............................................................................................7
1.1 Placas de certificação ...................................................................7
1.2 Diagrama de dimensões ...............................................................9
1.3 Vista explodida ............................................................................11
2. INTRODUÇÃO .................................................................................. 110
2.1 Visão geral do produto ..............................................................110
2.2 Informações de Segurança .......................................................110
2.3 Instruções de armazenamento .................................................. 111
3. INSTALAÇÃO ...................................................................................112
3.1 Uso em áreas classificadas .......................................................112
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3.2 Posicionamento .........................................................................112
3.3 Instalação ..................................................................................113
3.4 Ligações elétrica internas ..........................................................113
3.5 Critério gerais de cabeamento ..................................................114
3.6 Critérios de cabeamento – Loop de corrente de 4 a 20mA ......114
3.7 Critérios de cabeamento – MODBUS multiponto ......................115
3.8 Requisitos de aterramento ........................................................119
4. OPERAÇÃO ......................................................................................120
4.1 Painel de operação ...................................................................120
4.2 Indicações na tela .....................................................................120
5. CARACTERÍSTICAS TÉCNICAS .....................................................122
Xgard Bright Certification
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1. DIAGRAMS
1.1 Certification Labels
Diagram 1. ATEX and IECEx certification label Diagram 2. Gas name and range label
Diagram 3. Warning label
Français
1. SCHEMAS
1.1 Marques de certification
Schéma 1 : Marque de certification ATEX
et IECEx
Schéma 2 : Dénomination et plage du gaz
Schéma 3 : Plaque d'avertissement
Deutsch
1. KENNZEICHNUNGEN
1.1 Zertifizierungsetiketten
Abbildung 1 : ATEX- und IECEx-
Zertifizierungsetikett
Abbildung 2 : Gasname und Typenschild
Abbildung 3 : Warnschild
Certification Xgard Bright
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Español
1. DIAGRAMAS
1.1 Etiquetas de certificación
Diagrama 1: Etiqueta de certificación ATEX
e IECEx
Diagrama 2: Nombre del gas y etiqueta de
la gama
Diagrama 3: Etiqueta de advertencia
Italiano
1. SCHEMI
1.1 Etichette di certificazione
Schema 1: Etichetta di certificazione ATEX
e IECEx
Schema 2: Etichetta nome del gas e
intervallo
Schema 3: Etichetta di avvertenza
Nederlands
1. DIAGRAMMEN
1.1 Certificatielabels
Diagram 1: ATEX en IECEx certificatielabel
Diagram 2: Gasnaam- en bereiklabel
Diagram3:Waarschuwingslabel
Polski
1. DIAGRAMY I SCHEMATY
1.1 Etykiety certyfikacyjne
Diagram 1: Etykieta certyfikacyjna ATEX i
IECEx
Diagram 2: Etykieta z nazwą i zakresem
gazu
Schemat3:Etykietaostrzegawcza
Português do Brasil
1. FIGURAS
1.1 Placas de certificação
Figura 1: Placa de certificação ATEX e
IECEx
Figura 2: Placa de identificação e faixa
nominal do gás
Figura 3: Adesivo de avisos
Xgard Bright Dimensions
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1.2 Dimensions Diagram
M20 x 1.5
cable entry
M20 x 1.5
cable entry
166 Overall
Slots to suit M6
or 1/4” fixings
146 CRS
155.5 Overall
Diagram 4: Product Dimensions
Français
1.2 Schéma des dimensions
Schéma 4 : Dimensions du produit
1. 155.5 Hors tout
2. M20 x 1,5 Entrée de câble
3. M20 x 1.5 Entrée de câble
4. Fentes pour fixations M6 ou ¼”
5. 146 Entraxe
6. 166 Hors tout
Deutsch
1.2 Maßskizze
Abbildung 4 : Produktabmessungen
1. 155.5 Insgesamt
2. M20 x 1,5 Kabeleinführung
3. M20 x 1.5 Kabeleinführung
4. Schlitze passend für
Befestigungselemente M6 oder ¼"
5. 146 CRS
6. 166 Insgesamt
Español
1.2 Dimensiones Diagrama
Diagrama 4 – Dimensiones del producto
1. 155.5 General
2. M20 x 1,5 Entrada de cable
3. M20 x 1.5 Entrada de cable
4. Ranuras para adaptar fijaciones M6 o ¼
5. 146 CRS
6. 166 General
Dimensions Xgard Bright
10
Italiano
1.2 Schema dimensioni
Schema 4 – Dimensioni prodotto
1. 155.5 Totale
2. M20 x 1,5 Ingresso cavo
3. M20 x 1.5 Ingresso cavo
4. Slot adatti a fissaggi M6 o da ¼”
5. 146 CRS
6. 166 Totale
Nederlands
1.2 Afmetingendiagram
Diagram 4 – Productafmetingen
1. 155.5 Totaal
2. M20 x 1,5 Kabelinvoer
3. M20 x 1.5 Kabelinvoer
4. Sleuven voor M6- of ¼"-bevestigingen
5. 146 Middelpunten
6. 166 Totaal
Polski
1.2 Schematwymiarowy
Diagram 4 - Wymiary produktu
1. 155.5 Ogólne
2. M20x1,5Wpustkablowy
3. M20x1.5Wpustkablowy
4. Szczeliny dopasowane do mocowania
M6 lub ¼ "
5. 146 CRS
6. 166 Ogólne
Português do Brasil
1.2 Diagrama de dimensões
Figura 4 – Dimensões do produto
1. 155.5 Total
2. M20 x 1,5 Entrada de cabo
3. M20 x 1.5 Entrada de cabo
4. Furação para parafusos M6 ou ¼”
5. 146 Entre centros
6. 166 Total
Xgard Bright Exploded view
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1.3 Exploded View
Diagram 5: Xgard Bright exploded view
1.3 Vue éclatée
1.3 Explosionsansicht
1.3 Vista en despiece
1.3 Vista esplosa
1.3 Opbouwtekening
1.3 Widok rozstrzelony
1.3 Vista explodida
1 Gas label
2 Enclosure lid assembly
3 M4 stud
4 Main PCB assembly
5 Grubscrew
6 Certification label
7 Sensor assembly
8 Sensor chamber assembly
9 Enclosure base assembly
10 Wire guide
11 Sensor seals
12 Terminal PCB assembly
13 Ferrite
14 Circlip
15 M4x8Panheadscrew
16 M4 Stud
17 M20-1/2"NPT thread adaptor
18 M4SpringwasherST-ST
19 M4 Washer ST-ST
Exploded view Xgard Bright
12
Français
1 Marquage du gaz
2 Couvercle du boîtier
3 Goujon M4
4 Carte principale
5 Vis sans tête
6 Etiquette Xgard Bright
7 Capteur
8 Chambre du capteur
9 Base du boîtier
10 Guide-fil
11 Joints de capteur
12 Carte bornier
13 Ferrite
14 Circlip
15 Vis à tête tronconique M4x8
16 Goujon M4
17 Adaptateur fileté M20-1/2"NPT
18 Rondelle élastique M4 inox.
19 Rondelle M4 inox.
Deutsch
1 Gaskennzeichnung
2 Baugruppe Gehäuseabdeckung
3 Bolzen M4
4 Baugruppe Hauptplatine
5 Stifttap
6 Xgard Bright - Etikett
7 Sensorbaugruppe
8 Sensorkammerbaugruppe
9 Baugruppe Gehäuseboden
10 Drahtführung
11 Sensordichtungen
12 Baugruppe Leiterplattenklemmen
13 Ferrit
14 Sicherungsring
15 Flachkopfschraube M4x8
16 Bolzen M4
17 Kreuzteil M20-1/2"NPT
18 M4 Federscheibe ST-ST
19 M4 Unterlegscheibe ST-ST
Español
1 Etiqueta de gas
2 Conjunto tapa de la caja
3 Espárrago M4
4 Conjunto placa de bornes principal
5 Tornillo de sujeción
6 Etiqueta Xgard Bright
7 Conjunto de sensor
8 Conjunto de cámara de sensor
9 Conjunto de la base de la caja
10 Guía de cables
11 Juntas de sensor
12 Conjunto placa de bornes de terminales
13 Ferrita
14 Anillo de ajuste
15 Tornillo de cabeza plana M4x8
16 Espárrago M4
17 Sub paso M20-1/2"NPT
18 Arandela elástica M4 ST-ST
19 Arandela M4 ST-ST
Italiano
1 Etichetta gas
2 Gruppo coperchio involucro
3 Perno M4
4 Gruppo PCB principale
5 Vite senza testa
6 Etichette Xgard Bright
7 Gruppo sensore
8 Gruppo camera sensore
9 Gruppo base involucro
10 Guida filo
11 Guarnizioni sensore
12 Gruppo PCB terminale
13 Ferrite
14 Anello di sicurezza
15 Vite a testa troncoconica M4x8
18 Perno M4
17 Sub crossover M20-1/2" NPT
18 Rondella elastica M4 ST-ST
19 Rondella M4 ST-ST
Xgard Bright Exploded view
13
Nederlands
1 Gaslabel
2 Montage deksel van behuizing
3 M4-bout
4 Montage hoofd-PCB
5 Stifttap
6 Label Xgard Bright
7 Montage sensor
8 Montage sensorkamer
9 Montage basis van behuizing
10 Draadgeleider
11 Sensorafdichtingen
12 Montage terminal-PCB
13 Ferriet
14 Circlip
15 M4x8 halfrondkopschroef
16 M4-bout
17 M20-1/2"NPT cross-over sub
18 M4-veerring ST-ST
19 M4-ring ST-ST
Polski
1 Etykieta gazu
2 Zespółpokrywyobudowy
3 ŚrubadwustronnaM4
4 Zespółgłównejpłytkidrukowanej
5 Śrubadociskowa
6 Etykieta z certyfikatem
7 Zespółczujnika
8 Zespółkomoryczujnika
9 Zespółpodstawyobudowy
10 Prowadnicadrutu
11 Uszczelki czujnika
12 Zespółpłytkidrukowanejzacisków
13 Ferryt
14 PierścieńSegera
15 ŚrubazłbemwalcowymM4x8
16 ŚrubadwustronnaM4
17 NakrętkaprzeplotuM20-1/2"NPT
18 M4PodkładkasprężystaST-ST
19 M4PodkładkaST-ST
Português do Brasil
1 Placa de identificação do gás
2 Conjunto da tampa do corpo
3 Parafuso espaçador M4
4 Conj. placa de circuito impresso
principal
5 Parafuso sem cabeça
6 Rótulo de certificação
7 Conj. sensor
8 Conj. câmara do sensor
9 Conj. base do corpo
10 Guia de cabo
11 Anéis de vedação do sensor
12 Conj. placa de circuito impresso das
borneiras
13 Ferrita
14 Anel elástico
15 Parafuso cabeça abaulada M4x8
16 Parafuso espaçador M4
17 Adaptador M20-1/2"NPT
18 Arruela elástica inox M4
19 Arruela inox M4
English
14
English
2. INTRODUCTION
This manual contains essential health and safety requirements (EHSRs) and instruc-
tions for the safe installation and operation of the Xgard Bright range of gas detectors.
If more information is required then please refer to the full manual available from https://
www.crowcon.com.
2.1 Product Overview
Xgard Brightisaversatilegasdetectorformonitoringawiderangeofflammableand
toxic gases and oxygen levels. Xgard Bright incorporates a bright OLED (organic light
emittingdiode)displayandamagneticwandforeasymenuoperation.
Xgard Brightprovidesanalogue4-20mAandRS-485Modbussignalsasstandard,with
optional HART interface. Relays are also fitted for activating local alarms or sending
digital signals to control systems.
Xgard Brightmaybefittedwithelectrochemicaltypetoxicoroxygensensors,pellistor-
type flammable gas sensors, molecular property spectrometers (MPS), or infrared (IR)
hydrocarbon or carbon dioxide gas sensors. Please refer to the product identification
label to determine the type of sensor fitted.
Pellistor and MPS sensors are designed to detect flammable gases and vapours in
concentrationsnotexceedingtheLowerExplosiveLimit(LEL)ofthetargetgasforwhich
the detector is calibrated.
Xgard Bright is ATEX and IECEx Ex db IIC T6 Gb flameproof certified for use in Zone
1 or 2 hazardous gas areas and Ex tb IIIC T80°C Db for use in Zone 21 or 22 hazard-
ous dust areas.
2.2 Safety Information
Safety information relevant to Ex requirements:
WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD. The painted
aluminium enclosure constitutes a potential electrostatic hazard and the equipment
must only be cleaned using a damp cloth.
Thecableglandmustbeinstalledbeforeuseandmustcomplywiththerequirements
ofstandardsEN60019-0andEN60079-1withminimumIP66ingressprotection.
Unused cable entries must be sealed using an ATEX/IECEx Exd certified stopping
plugwithminimumIP66ingressprotection.
Only cables of types specific in these instructions can be used.
External earthing should be considered and installed according to these instructions
before use.
Xgard Bright
15
English
WARNING – DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE IS PRESENT.
The lid on Xgard Brightmustbekepttightlycloseduntilpowertothedetectoris
isolatedotherwiseignitionofaflammableatmospherecanoccur.Beforeremoving
the cover for maintenance, ensure the surrounding atmosphere is free of flammable
gases or vapours.
General safety information
Xgard Bright gas detectors must be installed, operated and maintained in strict
accordancewiththeseinstructions,warnings,labelinformation,andwithinthe
limitations stated.
Xgard Bright detectors are designed to detect gases or vapours in air, and not
inert or oxygen deficient atmospheres. Xgard Bright oxygen detectors can mea-
sure in oxygen deficient atmospheres.
Electrochemical cells used in toxic and oxygen versions of Xgard Bright contain
smallvolumesofcorrosiveelectrolyte.Careshouldbeobservedwhenreplacing
cellstoensurethattheelectrolytedoesnotcomeintocontactwithskinoreyes.
Maintenance and calibration operations must only be performed by qualified ser-
vice personnel.
OnlygenuineCrowconreplacementpartsmustbeused,substitutecomponents
mayinvalidatethecertificationandwarrantyofthedetector.
Xgard Bright detectors must be protected from extreme vibration, and direct sun-
light in hot environments as this may cause the temperature of the detector to rise
above its specified limits and cause premature failure. A sunshade is available for
Xgard Bright.
This equipment must not be used in a Carbon Disulphide atmosphere.
2.3 Storage instructions
Some types of sensor available with Xgard Bright have limited life when left un-
poweredand/ormaybeadverselyaffectedbytemperatureextremesorenvironmental
contamination.Idealstorageconditionsare20˚Cand60%RH.Donotexposesensors
to contaminants such as silicones, lead compounds and strong solvents such as isopro-
panol.Itisstronglyrecommendeddetectorsareinstalledandpoweredwithin3months
of purchase.
Xgard Bright
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English
3. INSTALLATION
3.1 Hazardous Area Use
3.2 Location
The detector should be mounted where the gas to be detected is most likely to be
present.The placementof sensors shouldbe determinedfollowing adviceof experts
havingspecialistknowledgeofgasdispersion,theplantprocessingequipmentaswell
as safety and engineering issues. The agreement reached on the locations of sen-
sors should be recorded.
Thedetectorshouldbemountedwherethegastobedetectedismostlikelytobepre-
sent.Thefollowingpointsshouldbenotedwhenlocatinggasdetectors:
Todetectgaseswhicharelighterthanair,detectorsshouldbemountedathigh
levelandCrowconrecommendtheuseofacollectorcone(PartNo.C01051).
Todetectheavierthanairgases,detectorsshouldbemountedatlowlevel.
When locating detectors consider the possible damage caused by natural events
e.g.rainorflooding.FordetectorsmountedoutdoorsCrowconrecommendtheuse
of a Spray Deflector (Part No. C01052).
Consider ease of access for functional testing and servicing.
Considerhowtheescapinggasmaybehaveduetonaturalorforcedaircurrents.
Mount detectors in ventilation ducts if appropriate.
Consider the process conditions. For example, butane is normally heavier than air,
butifreleasedfromaprocesswhichisatanelevatedtemperatureand/orpres-
sure, the gas may rise rather than fall.
Locationofoxygensensorsrequiresknowledgeofthegasthatmaydisplacethe
oxygen. For example, carbon dioxide is denser than air and therefore is likely to
displaceoxygenfromlowlevelsupwards.
Sensors should be mounted at head height (1.5m nominally) to detect gases of a
similar density to air, assuming that ambient conditions and the temperature of the
targetgasarenominally20˚C.
WARNING
This detector is designed for use in Zone 1 and Zone 2 or Zone 21 and Zone
22 hazardous areas, and is certified Ex db IIC T6 Gb and Ex tb IIIC T80°C Db
for operation up to 70°C (158°F). Installation must be in accordance with the
recognized standards of the appropriate authority in the country concerned. For
further information please contact Crowcon. Prior to carrying out any installa-
tion work ensure local regulations and site procedures are followed.
Xgard Bright
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English
The placement of sensors should be determined following advice of experts having
specialist knowledge of gas dispersion, the plant processing equipment as well as
safety and engineering issues. The agreement reached on the locations of sensors
should be recorded.
3.3 Mounting
Xgard Bright shouldbe installedat the designated location with the sensor pointing
down.Thisensuresthatdustorwaterwillnotcollectonthesensorandstopgasenter-
ingthecell.Care shouldbetakenwheninstallingthedetector toavoiddamagingthe
painted surface of the enclosure.
TherearetwoM20x1.5entryportsonthebase.Oneentryportwillbeusedforpower
supplyinputduringnormaloperation.Unusedportwillbeblockedbyblindplug,orcan
be used to connect external alarm device or be used for connecting devices to the multi
dropcommunications.Enduserwillonlyusecertifiedcableglandforinstallation.
Refer to the dimension diagram, diagram 4, for mounting hole details.
3.4 Internal Electrical Connections
Diagram 6: Xgard Bright internal electrical connections
B A B A
SINK
485
4-20mA LOOP
SIG
+
SOURCE
Fault
Level2
Level1
SOUNDER OUT
NO
NC
RT
NO
NC
NO
NC
Vmax=30V Wmax=3W
Xgard Bright Gas Detector
Sounder Out
PowerandLoopConnector
Production
use only
Production use
only
NOT USB!
Alarm level 2
Relay Output
Alarm Level 1
Relay Output
Alarm Level 1
Normally Open
or Normally
Closed Jumper
Selection
SOURCE/SINK
Jumpers Fitted to
LHS = SINK, see
lengend on board
RS485 IN/OUT
or End of Line
Terminator
Alarm Level 2
NO/NC Jumper
Selection
LowerBoard
Sensor
Connector
LowerBoard
Programming
Connector
Fault NO/NC
Jumper Selection
Fault Relay
Output
Xgard Bright
18
English
NOTE: the mini USB socket is not intended for customer use, connecting this to a
computer is likely to damage both Xgard Bright and the computer.
3.5 General Cabling Requirement
Cabling to Xgard Brightmustbeinaccordancewiththerecognisedstandardsofthe
appropriate authority in the country concerned and meet the electrical requirements of
the detector.
Suitable explosion proof glands must be used. Alternative cabling techniques, such as
steel conduit, may be acceptable provided appropriate standards are met.
3.6 Cabling Requirement 4 to 20 mA Current Loop
Fulfilstherequirementsfor4to20mAcurrentloopandHARTconnections,allowsfor
connectionandpoweringofaccessorybeaconorsoundersubjecttocurrentconsump-
tion, cable resistance and panel voltage. Current consumption should consider worst
casee.g.whentheaccessoriesarepowered.
Example Calculation 1
What is the longest cable for a bright to operate using point to point connection and
poweringasounderwith250mAcurrentconsumption.Useparametersof1.5mm
2
cable,
wherethecontrollerhasaguaranteedminimumoutputvoltageof18V.
Thistypeofcablehasresistanceof12.1Ω/km,thereforethethereandbackcableresist-
ance is 24.2. Xgard Bright has min voltage requirement of 10V.
The alarm 2 current for Xgard Bright (pellistor) is 95mA , Xgard Bright (MPS) is 34mA,
and the sounder output max current is 0.25A, so a total current in alarm driving the
sounder output is:
Max current = 0.25 + 0.095 = 0.345A.
18V=10V+(0.345x24.2xd),wheredisdistanceinkm
d = (18 – 10) / (0.345 x 24.2) = 0.958km
Example Calculation 2
Asexamplecalculation1butwithoutthesounder.
Xgard Bright pellistor requires a dc supply of 10-30V, at max current in alarm 2 of 95mA.
Ensure there is a minimum of 10V at the detector, taking into account the voltage drop
Xgard Bright
Beacon/
Sounder
Power+V
Signal
Power0V
Detector
Control
Panel
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Crowcon Xgard Bright Manuel utilisateur

Taper
Manuel utilisateur