Digital Automatic Coupling

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{{short description|Automatic coupling system for rail freight}}

Digital Automatic Coupling (DAC) is an advanced coupling system designed for the automatic connection of freight wagons. Unlike traditional screw couplings, the DAC system enables automatic mechanical coupling as well as electrical and data connections between train cars.{{Cite web|url=https://voith.com/corp-en/scharfenberg-couplers/digital-automatic-coupler.html|title=Digital Automatic Coupler | Voith|website=voith.com}}{{Cite web|url=https://www.groupe-sncf.com/en/innovation/european-partners/dac|title=Digital automatic coupling for freight transport|date=March 13, 2024|website=SNCF Group}}https://rail-research.europa.eu/latest-news/digital-automatic-coupling-dac-the-backbone-for-full-digital-rail-freight-train-operations-in-europe/{{Cite web|url=https://www.globalrailwayreview.com/topic/digital-automatic-coupling-dac/|title=Digital Automatic Coupling (DAC)|website=Global Railway Review}}{{Cite web|url=https://www.railtarget.cz/technologies-and-infrastructure/revolutionizing-european-railways-the-shift-towards-digital-automatic-coupling-8123.html|title=Revolutionizing European Railways: The Shift Towards Digital Automatic Coupling | RAILTARGET|website=www.railtarget.cz}}

The DAC system is a key component of the European DAC Delivery Programme (EDDP), which is supported by the European Union. It facilitates interoperability across various rail networks in the European Union. DAC provides a continuous power and data line throughout the train, allowing for real-time monitoring and data transmission between wagons.