The invention relates to a process for the preparation of diaminodicyclohexylmethane with a proportion of trans,trans-4,4-diaminodicyclohexylmethane of from 17 to 24% by hydrogenation of diaminodiphenylmethane in the presence of a pulverulent catalyst in a continuously operated suspension reactor at a conversion of MDA of at least 95%, based on the amount of MDA used. In a first fixed state, the belt adjustment mechanism generates a lower horizontal belt path that is a relatively short distance from the seat base portion, thereby optimizing the seat assembly for securing shorter children or infants having lower CGs. An access generator circuit generates an isolated access signal using at least one of the isolated area parameters and access information in the transaction.