| 摘要 |
PURPOSE:To both eliminate the influence of an electrical noise and form the total unit of a device in a compact size, by converting the opening and closing control instruction by light into an electric signal and controlling a solenoid valve to be opened and closed. CONSTITUTION:One end of a solenoid 22 in a solenoid valve 20 is connected to one end of a power supply 24 through a fuse 26, and the other end of the solenoid 22 is connected to the other end of the power supply 24 through a switching part 57 in a control means 59 equipping a photoelectric converter 55. An opening and closing control instruction by light fed through an optical fiber cable 6 is converted by the control means 50 into an exciting current flowing in the solenoid 22 of the solenoid valve 20, controlling a valve 26 of the solenoid valve 20 to be opened or closed. In this way, eliminating any necessity for interposing a buffer circuit of relay panel or the like for converting an electric signal level, the direct connection, being capable to an optically operated solenoid valve, both eliminates the influence of an electrical noise and forms the whole unit of a device in a compact size. |
