Arrangement for transmitting digital data

Claim 1

An arrangement for transmitting digital data, comprising a plurality of stations which together with a main station are connected to a common communication path, these stations comprising a data transmitter, a data receiver and addressing means, characterized in that said main station comprises a disableable clock pulse generator, that said addressing means of each station comprise a clock pulse counter for counting the clock pulses transmitted by said clock pulse generator via a clock channel which forms part of said communication path, that said addressing means further comprise an address register and a comparator arrangement for comparing the instantaneous counting position of said clock pulse counter with the content of said address register, that when there is equality between said counting position and said content and a communication request is present at an addressed station a switching signal is generated by the addressed station which signal disables said clock pulse generator via a SEND-channel forming part of said communication path, that said addressed station transmits digital data via a data channel forming part of said communication path to a second addressed station and that after the data transmission has ended the disabling of said clock pulse generator is cancelled via said SEND-channel which forms part of said communication path.