2Ex Products Installation & Maintenance Procedures
Contents
1About this Document 3
1.1 Scope ................................................................................................................................................... 3
1.2 Revision History.................................................................................................................................... 3
1.3 Certificates............................................................................................................................................ 3
2The Ex Products 4
3System Design Overview 5
3.1 Ex Protection Strategy.......................................................................................................................... 5
3.1.1 Marking ............................................................................................................................................................. 5
3.1.2 Specific Conditions of Use ................................................................................................................................ 6
3.2Connection to Central Equipment ........................................................................................................ 6
3.3 Electrical Connections .......................................................................................................................... 7
3.3.1 Connection of Audio Accessories...................................................................................................................... 9
3.3.2 Earthing............................................................................................................................................................. 11
3.3.3 Cable Insertion .................................................................................................................................................. 11
3.4 Electrical Parameters ......................................................................................................................... 12
3.4.1 Electrical Data................................................................................................................................................... 12
3.4.2 Intrinsically Safe Connections for External Audio Accessories.......................................................................... 12
3.4.3 Intrinsically Safe Connections for External Push Buttons.................................................................................. 13
3.4.4 External Loudspeaker ....................................................................................................................................... 13
3.4.5 Relay Output to External Signaling Device ....................................................................................................... 13
3.4.6 Debug Connector.............................................................................................................................................. 13
3.5 Terminals and Connectors ................................................................................................................. 14
4Maintenance Service 15
4.1 General ............................................................................................................................................... 15
4.1.1 Watertight Enclosure......................................................................................................................................... 15
4.1.2 Wires................................................................................................................................................................. 15
4.2 Repair / Overhaul / Modifications ....................................................................................................... 15
4.3 End of Life and the WEEE directive ................................................................................................... 16
