ISO 13044-2:2013

Road vehicles — Fully automatic coupling systems 24 V (FACS) for heavy commercial vehicle combinations — Part 2: 50 mm fifth wheel couplings — Electrical and pneumatic interface

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ISO 13044-2:2013 specifies the mechanical, electrical/electronic and pneumatic characteristics of a fully automated fifth wheel coupling system to ensure interchangeability between a tractor vehicle and a coupled semi-trailer(s) with 24 V nominal supply voltage. The two vehicles together constitute an articulated vehicle.
ISO 13044-2:2013 also supports the smooth introduction of fully automated fifth wheel coupling systems in the market. It specifies features necessary for mixed mode operation; i.e. the combination of a fully automated coupling system (FACS) equipped tractor vehicle with a conventional semi-trailer, and vice versa, the combination of a conventional tractor vehicle with a FACS-equipped semi-trailer.