AUSTRIA: ÖBB Rail Cargo Group’s digital automatic coupler demonstration train is to undertake a ‘grand tour’ of the national network during 2026 to assess operation under a wide range of different scenarios.
The DAC demonstration train will initially comprise eight wagons, expanding to 24 wagons from mid-2026. The wagon types include Eanos, Sgnss, Shimmns 4668 and 4676, Habbiins, Talns and Faccns, with DACs from different manufacturers all of which are fully interoperable. Combining different wagon and coupler types in numerous configurations aims to provide a realistic representation of single-wagonload train operations with insights on the forces acting on the couplers.
RCG said it had selected wagons types which are widely used and future-proof, meaning modern bogie wagons with a high capacity rather than two-axle designs.
For testing purposes Siemens Mobility has retrofitted two Vectron locomotive with hybrid couplers, enabling them to haul wagons equipped with either DAC or conventional screw couplings, as well as with additional electrical systems and a dedicated power supply. The locos will provide RCG with data on double-headed operation, which is required for very heavy trains or on steep gradients.
Each wagon is fitted with a Consist Control Unit in the former buffer position and each locomotive with a Lead Control Unit, providing both the power supply and continuous communication between the locomotive and the wagons. The wagons send a signal to the locomotive approximately once per second, informing the driver of train integrity.
Results of the trials will be shared with DAC demonstation projects in Germany, Italy, Sweden and Switzerland. RCG notes that Austria’s network features tight curves, steep gradients, tunnels and alpine conditions, while Sweden has long stretches of track with harsh winter conditions.
The experience gained will be incorporated into the Pioneer DAC Trains project from 2027 onwards, which will oversee the first large-scale commercial deployment of trains equipped with DAC couplings and digital train functions.
