| 摘要 |
PURPOSE:To make easy the transmission/reception of radio signal and the operation of push button switch, by providing a reception section forming the return signal in front of the monitor input terminal device and providing a push button switch at a terminal device further. CONSTITUTION:The monitor input terminal device 4 provides a reception section 12 receiving the optical signal from the transmitter, signal processing section 28 transmitting the desired signal to the logic circuit 27 with the output of the detection section 26, and OR gate 29 taking the logical sum between the output of the section 28 and the depression signal of the push button switch 17. Further, the optical signal from the transmitter is received on the reception plane of the reception section 12 and this signal is input to the circuit section 27. The circuit section 27 returns the return signal to produce the control signal of control terminal devices when it is called from the main operating panel with the signal input. Further, even with the closing of the switch 17, the circuit 27 is operated together with the reception of radio signal from the transmitter. |
