| 摘要 |
PURPOSE:To reduce greatly signal lines in number by providing a center station for signal distribution and then by allowing respective stations to use this center station for signal transmission. CONSTITUTION:Center station 2 is provided with signal distributor circuit 6, and input circuits 8, output circuits 7, input gate circuits 5, and output gate circuits 4 corresponding to respective slave stations 1, and circuits 5 and 4 turn On-OFF under the control of output gate signal (g) of circuit 6. An input signal from one of slave stations 1 is received by circuit 8 and led to circuit 6 as signal (i) with corresponding circuit 5 ON, and output signal (o) is sent to gate 4 for transmission-destination slave station 1 and sent out to the slave station 1 via circuit 7. In this way, center station 2 is provided so as to reduce signal lines in number greatly. |
