The invention relates to a sealing cap, for openings and containers. The bonded adhesion is brought about according to the invention utilizing a two-layer system on the basis of acrylate resins consisting of an inner coating and of an outer coating, wherein the inner coating has a lower hardness, than the outer coating. The switches and the first elements comprise transistors and the second elements comprise transistors or diodes. The delay code control unit generates, based on a comparison result of the frequency comparison unit, the frequency control code so that the frequency of the clock generated by the digital control oscillator matches the frequency of the multiplied reference clock. A node controlling the connection checks the value of the indicator when it performs a decision to insert or remove an entity.