Digital automatic coupling

Digital automatic coupling (DAC) represents a significant technological advancement in rail freight transport by digitising and automating the rail coupling process. This enhances the efficiency of rail operations.

Digital Automatic Coupling will play a key role for the freight industry to achieve the modal shift to rail in its efforts to align with the EU Green Deal objectives. DAC contributes to increasing operational efficiency, thus handling more traffic without proportional increases in costs or resources.

To achieve the above, the rail industry needs comprehensive testing of DAC systems. A trusted third-party testing and inspection services provider such as TÜV SÜD can ensure this.

DAC systems such as DAC couplers facilitate quicker and safer train operations, allow for the handling of longer and heavier trains, and improve terminal throughput. By automating the coupling process, DAC reduces labour costs and time delays, contributing to a more competitive and efficient rail freight sector. 

To ensure the safety and reliability of DAC systems, extensive testing becomes important. Testing is also vital for the integration of DAC systems into existing rail operations while maintaining compatibility with various locomotive types. 

Furthermore, thorough testing helps you navigate the complex landscape of national and international rail standards and achieve regulatory compliance. It balances your cost management needs with the necessity of achieving the highest standards of safety and performance. 

TÜV SÜD offers comprehensive testing and certification services for DAC systems, ensuring they meet all relevant standards and are optimally integrated into client operations.

Our services include static and dynamic testing, impact assessments, safety evaluations, and lifecycle testing, all conducted at our state-of-the-art Rolling Stock Test Center in Görlitz and other locations as needed. Our advanced testing facilities are equipped to handle all aspects of DAC testing from component to full-system evaluations.

With a global network of experts, we can assist you with a deep understanding of rail system requirements and challenges. Our experts are constantly up-to-date with the latest regulatory developments and provide comprehensive support from initial concept to final certification.

We have a proven track record and a long history of supporting major advancements in rail technology, with a focus on safety and efficiency. Our international presence will help you with global market access.

Our DAC tests include:

• Quasi-static tests of DAC coupler in horizontal testing machine up to 3000 kN.
• Quasi-static tests of DAC coupler in vertical testing machine up to 1500 kN.
• Tests of safety against derailment in propelling test based on EN 15839.
• Driving tests in different curves and on ferry ramp.
• Coupling tests with different scenarios.
• Impact tests wagon against wagon on straight and curved track.
• Impact tests with a rigid wall.
• Single loads and live cycle tests (e.g. according DIN EN 15551:2022-10) on pendulum test rig.