| 摘要 |
PURPOSE:To realize the small size and economy of a connection section by using electric signal input/output terminals as a pair and applying prescribed connection between the electric signal input/output terminal and a switch element. CONSTITUTION:The input of a optic/electric conversion circuit 1 and an output of an electric/optic conversion circuit 2 are connected to an optical loop A and the input of a optic/electric conversion circuit 4 and the output of the electric/optic conversion circuit 3 are connected to an optical loop B. The output of the optic/electric conversion circuit 1 is connected to a common terminal (c) of a switch element 5 and the input to the electric/optic conversion circuit 2 is connected to the common terminal (c) of a switch element 6. On the other hand, the output of the optic/electric conversion circuit 4 is connected to the common terminal (c) of the switch element 8 and the input of the electric/optic conversion circuit 3 is connected to the common terminal (c) of a switch element 7. Switching terminals 02 of the switch elements 7, 8 are connected with each other to omit the electric signal input line and the electric signal output line as a different point from a conventional device. |
