Crowcon Xgard Bright User's And Operator's Manual

Xgard et Xgard IR Détecteurs de gaz,

Manuel de l'utilisateur et de l'opérateur,

M079910 issue 3 Avril 2019

Xgard und Xgard IR Gasdetektoren

Benutzer- und Bedienerhandbuch,

M079910 issue 3 April 2019

Xgard y Xgard IR Detectores de gas

Manual del usuario y del operador,

M079910 issue 3 Abril 2019

Xgard e Xgard IR Rilevatori di gas,

Manuale per utente e operatore,

M079910 issue 3 aprile 2019

Xgard en Xgard IR Gasdetectors,

Handleiding voor gebruikers en operators,

M079910 issue 3 april 2019

Xgard i Xgard IR Detektor gazu,

Podręcznik użytkownika i operatora,

M079910 issue 3 kwiecień 2019

Xgard e Xgard IR Detectores de gás,

Manual do Usuário e Operador,

M079910 issue 3 Abril 2019

M079910

Issue 3 April 2019

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

2

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

Xgard Bright

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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

7

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

8

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

9

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

11

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 Bright is 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 or infrared (IR) hydrocarbon or carbon dioxide gas sensors.

Please refer to the product identification label to determine the type of sensor fitted.

Pellistor 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.

• WARNING – DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE IS PRESENT.

Xgard Bright

15

English

• 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

16

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

17

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 Bright must 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 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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