| 摘要 |
PURPOSE:To enable to transmit accurate signal with a simple constitution, by the transmission of different transmission system for selection signal and control signal at load and reducing the number of channels. CONSTITUTION:When the transmitter 3 performs ON operation corresponding to the specific load 41, FF7, 8 are operative, the respective output excites the oscillation circuit 11, and the high frequency oscillation output in the circuit 11 is transmitted to the signal line 1 via the coupling circuit 12. Further, the time set circuit 6 produces the signal after a set time corresponding to the load 4 to reset FF7, 8 and to stop the oscillation of the circuit 11. On the other hand, at the load side, the ON signal fed to the signal line 1 is received at the filter 13 for passage. Thus, the transmission system for the selection signal and the control signal for the load is made different, allowing to decrease the number of channels. Thus, the signal transmission can be made accurately with a simple constitution. |
