for use in systems for central access control, only approved in conjunction with user interface (PC1-I), setting and saving parameters of the reader such as AS address, serial number, relay switching time, creating access profiles (e.g. time-, person- and location-dependent) with different user rights for time zones, reading and deleting keys using key readers with i and t readers (not included in delivery), assigning key number and key holder, assigning access rights, also time-dependent, key data records contain name, number and reaction, system monitoring, printing of key overviews, handover protocols, project management, logging in log files, 3 password-protected user levels, for up to 7 TCS:BUS systems in parallel management