Arrangement for the connection of wall switches in installation systems

摘要

A plurality of wall switches (5) having switches (S) are connected both to a clock line (6) and to a latch line (7), which lines emerge from a central unit (4). All the wall switches are connected in a series circuit via a data line (8) to the central unit (4). After a pulse is sent from the central unit (4) on the latch line (7), the position of the switches (5) is simultaneously taken over into the corresponding wall switches (5). After the sending of a plurality of pulses from the central unit (4) on the clock line (6), the state of the wall switches (5) is passed on stepwise in sequence to the next wall switch, until the content of the last wall switch has also reached the central unit. <IMAGE>