"IC REG relay" with potential-free changeover contact for connecting external products to the digital power system. In the areas of photovoltaics, e-charging technology, heat pumps and other technologies, a potential-free signal exchange from the smart home system is often expected. Module width 1TE, dS ready, pre-parameterized and ready for immediate use. By defining a separate room in the dS system as an independent device in the system.