An installation for equipping DIN rails, according to an order, with components, including at least one of terminal blocks, electrical devices, and end holders, that are intended to be subsequently installed in switch cabinets, includes at least one main cell. The at least one main cell includes at least one supply unit for supplying the components to be fitted; at least one supply unit for supplying DIN rails, the DIN rail being equipped with the components in the main cell; and a writing, device designed to wirelessly transmit data, in order for said data to be saved, to a memory unit that is arranged on each DIN rail equipped with components and has an integrated wireless communications interface, the data containing order-specific information.