Contents
D-LX 201/721
3
Contents
1 General 7
1.1 Information on this manual ............................................................................................................... 7
1.2 Explanation of symbols..................................................................................................................... 8
1.3 Limitation of liability......................................................................................................................... 10
1.4 Warranty ......................................................................................................................................... 10
1.5 Spare parts ..................................................................................................................................... 10
1.6 Customer service............................................................................................................................ 11
1.7 Copyright ........................................................................................................................................ 11
1.8 Trademarks..................................................................................................................................... 11
2 Safety 13
2.1 General safety instructions ............................................................................................................. 13
2.2 Fundamental hazards ..................................................................................................................... 13
2.2.1 Hazards due to electric current....................................................................................................... 14
2.2.2 Risk of burns due to hot surfaces ................................................................................................... 14
2.2.3 Damage due to failure of the purge air ........................................................................................... 14
2.3 Qualified personnel......................................................................................................................... 15
2.4 Personal protective equipment ....................................................................................................... 16
3 Explosion protection 17
3.1 Basics ............................................................................................................................................. 17
3.2 Classification of the equipment groups into categories .................................................................. 17
3.3 Zone allocation as per ATEX .......................................................................................................... 18
3.4 Temperature classes ...................................................................................................................... 18
3.5 EPL Equipment Protection Level .................................................................................................... 19
3.6 Ignition protection categories.......................................................................................................... 19
3.6.1 Pressure-proof encapsulation "Ex d" .............................................................................................. 19
3.6.2 Ignition protection type "Ex n" (gas) ............................................................................................... 20
3.6.3 Protection in the form of an "Ex t" housing (dust) ........................................................................... 21
3.7 Explosion labelling .......................................................................................................................... 22
3.7.1 ATEX Markings............................................................................................................................... 22
3.7.2 Labelling as per NEC 500............................................................................................................... 22
3.8 Ex type label ................................................................................................................................... 23
3.9 Safety with explosion-proof devices ............................................................................................... 25
3.9.1 All devices....................................................................................................................................... 25
4 Functional safety 27
4.1 Relevant standard........................................................................................................................... 27
4.2 Functions of the flame monitor ....................................................................................................... 27
4.3 General applicable parameters for the flame monitor..................................................................... 28
4.4 Operation with low and high demand modes.................................................................................. 28
4.5 Operation with low demand mode .................................................................................................. 28
4.6 Proof test for the low demand mode............................................................................................... 29
4.7 Operation with high demand mode................................................................................................. 30
5 Product description 31
5.1 Notes on delivery ............................................................................................................................ 31
5.2 Accessories..................................................................................................................................... 31
5.2.1 Connecting cable ............................................................................................................................ 33
5.2.2 Factory settings............................................................................................................................... 33
5.3 Notes on the product ...................................................................................................................... 34
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