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Digital automatic coupling
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<p>Digital automatic coupling (DAC) is a type of <a href="/facts/Railway_coupling/tPU5f69E">railway coupling</a> developed in the 2020s to replace the <a href="/facts/Buffers_and_chain/nnxfDlMM">English buffers and chain</a> couplings, initially in Europe. </p><p>It resembles the <a href="/facts/Scharfenberg_coupler/7cNozpvU">Scharfenberg coupler</a> with extra contacts to join electrical circuits (power, detection and control) and air hoses. </p>