1. Gas Coordination Meeting Cabling

2. General Philosophy Cables between racks within the Surface Gas Building or between racks within the Underground Gas Building will be purchased and installed by PH-DT1/Gas Cables between areas and between racks in the UX Cavern will be purchased and installed by experiment groups to PH-DT1/Gas specification Where Possible, Use of Standard Cables available from Cern Store – main exception is CAN bus cable for which the Cern standard is insufficient for the distances involved.

3. Gas Racks Typical Surface Area Entrance to Shaft Surface Gas Buidling Control Rack CAN Bus 3 P+N Profibus PA TT Signal Cable Profibus DP Voltage Reference For CAN Bus Ethernet

4. Distribution Rack Gas Racks Typical Underground Area Profibus DP CAN Bus Voltage Reference For CAN Bus Profibus PA Cavern Underground Gas Room/Area Signal Cable Control Rack Valve Islands Valve Positioner Electronic Rack Signal Cable CAN Bus Flow Meter DC Power 3 P+N Profibus PA PT ATLAS Underground Area Ethernet

5. Extract From Typical Cable Schedule