| 摘要 |
A data transmission device having a plurality of monitor units which are wire connected in series to a computer. During a working cycle, one unit after the other is activated by emission of clock pulses from the computer. The clock pulses are counted in an address counter (4) in the respective unit. Upon reaching a count value preset in an address coder (7) a sequential circuit (6) is activated, the latter consisting of a binary counter (3) and a functional decoder (5) connected thereto. At the same time as clock pulses corresponding to the address of the unit are received via a clock pulse connection ("clock"), a pulse train is emitted via switches (A,B,C,D), the positions of which corresponding to sensed information bits, to a data transmission connection ("data"). The outputs of the sequential circuit (6) are also connected to a control circuit (9) for generating control signals to the particular monitor unit or a sub-system connected thereto.
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