DURAG D-LX 721 - Page 4

Contents
4
D-LX 201/721
5.4 Designated use, application areas.................................................................................................. 34
5.5 Selection criteria for D-LX 201/D-LX 721........................................................................................ 34
5.6 Conformity....................................................................................................................................... 36
5.7 Name of the product ....................................................................................................................... 36
5.8 Type code ....................................................................................................................................... 38
5.9 Notes on the warranty..................................................................................................................... 39
6 Configuration and function 41
6.1 Functional description..................................................................................................................... 41
6.1.1 Infra-red flame sensor..................................................................................................................... 42
6.1.2 Ultraviolet flame sensor .................................................................................................................. 43
6.1.3 Self-monitoring................................................................................................................................ 43
6.1.4 Error shutdown ............................................................................................................................... 44
6.2 Device description .......................................................................................................................... 45
6.2.1 D-LX 201 with housing M5/P2 ........................................................................................................ 46
6.2.2 D-LX 721 with housing M5/P2 ........................................................................................................ 47
6.2.3 D-LX 201 with housing M4 and S2 for zone 1/21 ........................................................................... 48
6.2.4 Front panel (all types) ..................................................................................................................... 49
7 Installation and commissioning 51
7.1 Safety.............................................................................................................................................. 51
7.2 Transport......................................................................................................................................... 52
7.3 Installation....................................................................................................................................... 52
7.3.1 Notes on selecting a suitable installation site ................................................................................ 52
7.3.2 Attaching the flange ........................................................................................................................ 52
7.4 Opening and closing the housing ................................................................................................... 55
7.4.1 Removing the plug-in cover (housing M5/P2)................................................................................. 55
7.4.2 Screwing down the plug-in cover (housing M5/P2) ........................................................................ 55
7.4.3 Removing the cover (housing M5/P2) ............................................................................................ 56
7.4.4 Screwing down the cover (housing M5/P2) .................................................................................... 57
7.4.5 Opening housing M4 and S2 (for zone 1/21).................................................................................. 58
7.4.6 Closing housing M4 and S2 (for zone 1/21) ................................................................................... 60
7.5 Electrical connection....................................................................................................................... 61
7.6 Cables and screening ..................................................................................................................... 65
7.7 Installation, purge air supply ........................................................................................................... 66
7.8 Initial commissioning....................................................................................................................... 68
7.9 Dismantling and disposal................................................................................................................ 68
7.9.1 Dismantling ..................................................................................................................................... 68
7.9.2 Disposal .......................................................................................................................................... 69
8 Flame monitor settings 71
8.1 Range selection .............................................................................................................................. 72
8.2 Setting the threshold for the intensity ............................................................................................. 73
8.3 Selecting the gain characteristic curve ........................................................................................... 75
8.4 Setting the threshold for the flicker frequency ................................................................................ 77
8.5 Setting sequence ............................................................................................................................ 78
8.5.1 Aims of the settings ........................................................................................................................ 78
8.5.2 Adjusting settings via D−LX 201 InformationCentre ....................................................................... 79
8.5.3 Setting using the analogue output/LED .......................................................................................... 80
8.6 Flame Failure Detection Time (FFDT) ............................................................................................ 82
8.7 Modbus ........................................................................................................................................... 84
8.7.1 Hardware and framework conditions .............................................................................................. 84
8.7.2 Setting the Modbus slave address.................................................................................................. 84