| 摘要 |
PURPOSE:To eliminate electromagnetic interference between transmission lines and to prevent malfunction by converting a command signal into an optical signal, sending it through an optical transmission line, converting the optical signal from the optical transmission line at the reception side into an electric signal and controlling the operating state of the device to be controlled by the electric signal. CONSTITUTION:Based on reception information, a command signal generating circuit 1 generating a command signal, an electrooptic signal conversion circuit 7 converting the command signal from the circuit 1 into an optical signal, and an optical transmission line 9 whose one end is connected to the circuit 7 and sending the optical signal are provided. Moreover, an optoelectric signal conversion circuit 8 receiving the optical signal through the connection to the other end of the line 9 and converting it into an electric signal and the controller controlling the operating state of the device 3 to be controlled in response to the electric signal from the circuit 8, are provided. Thus, the command signal is converted into an optical signal and sent to the cable 9, then no electromagnetic interference takes place with other signal flowing other cable 6, then the command signal is sent with high reliability without malfunction. |
