Lesson plan
Digital automatic coupling
's DAK product 2024 Digital automatic coupling (DAC) is a type of railway coupling for freight wagons developed in the 2020s to replace buffers and chain couplers, initially in Europe. It resembles the Scharfenberg coupler with extra contacts to join electrical circuits (power, detection and control) and air hoses. The DAC project is a key component of the European DAC Delivery Programme (EDDP), which is supported by the European Union. DAC provides a continuous power and data line throughout the train, allowing for real-time monitoring and data transmission between wagons. The system is among several innovations being developed within European working groups to harmonize the rail network and aims to boost freight traffic by 2030. Although not a member of the European Union, Switzerland is associated with the project and wants to subsidize the transition to digital automatic coupling on its territory. The development of the coupler type was finished in mid 2026. The design is based on the Voith CargoCoupler that had been developed for Swiss Federal Railways since 2017, itself based on the Scharfenberg Type 10 coupler as used for high-speed rail in Europe. The Pioneer DAC Trains (PioDAC) will use the new coupler in regular commercial service by 2027. Retroffitting guidelines are being developed until 2029 with serial installation planned in the time frame from 2031 to 2036.
Article summary
's DAK product 2024 Digital automatic coupling (DAC) is a type of railway coupling for freight wagons developed in the 2020s to replace buffers and chain couplers, initially in Europe. It resembles the Scharfenberg coupler with extra contacts to join electrical circuits (power, detection and control) and air hoses. The DAC project is a key component of the European DAC Delivery Programme (EDDP), which is supported by the European Union. DAC provides a continuous power and data line throughout the train, allowing for real-time monitoring and data transmission between wagons. The system is among several innovations being developed within European working groups to harmonize the rail network and aims to boost freight traffic by 2030. Although not a member of the European Union, Switzerland is associated with the project and wants to subsidize the transition to digital automatic coupling on its territory. The development of the coupler type was finished in mid 2026. The design is based on the Voith CargoCoupler that had been developed for Swiss Federal Railways since 2017, itself based on the Scharfenberg Type 10 coupler as used for high-speed rail in Europe. The Pioneer DAC Trains (PioDAC) will use the new coupler in regular commercial service by 2027. Retroffitting guidelines are being developed until 2029 with serial installation planned in the time frame from 2031 to 2036.
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Discussion questions
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