Abstract: A circuit arrangement for serial data transmission between a plurality of subscriber stations via a data bus with transmitters that are high-impedance in the passive condition and low-impedance in the active condition is provided with a mutual control of the subscriber stations which occurs via the data bus without the assistance of additional control lines. This is achieved in that the leads of the data bus are each connected to a voltage source at at least one location via a resistor and in that at least one evaluation device for evaluating the voltages carried by the two leads is provided, the evaluation device outputting a busy signal given voltages of different magnitude at the leads of the data bus and outputting a free signal given identical voltages at the leads of the data bus. The circuit arrangement is particularly suitable for utilization in remote control devices.

Abstract: A circuit arrangement is provided for serial data transmission between a plurality of subscriber stations via a data bus, the circuit arrangement comprising data transmitters that are in a high-impedance state in the passive condition and in a low-impedance state in the active condition. In such a circuit arrangement, a mutual control of the subscriber stations occurs by way of the data bus without the assistance of additional control lines. This is achieved with the assistance of a recognition circuit having two data receivers in fail-safe circuitry connected in an antiparallel manner at their inputs and having their outputs connected to a logic element. The control arrangement is particularly suited for utilization in remote control devices.

Abstract: A circuit arrangement is provided for serial data transmission between a plurality of subscriber stations via a loaded data bus and having transmitters that are in a high-impedance state in the passive condition and in a low-impedance state in the active condition. In such a circuit arrangement, a mutual control of the subscriber stations occurs via the data bus per se without the assistance of additional control lines. This is achieved with the assistance of a recognition circuit which emits a free signal at its output given at least approximately identical voltages at the data bus and emits a busy signal given different voltages at the data bus. The control arrangement is particularly suitable for utilization in remote control stations.