| 摘要 |
PURPOSE:To reduce relays and to simplify wiring and connection by providing a limit switch, a control current circuit to supply an opening and closing control current to a controlling input section of current control elements through the relays and a current detector inserted thereinto to detect the control current and to generate the detected output. CONSTITUTION:When an output signal V1 is transmitted to an excitation coil C2 of a relay 16 from a controller 20, an excitation coil C1 of a relay 10 is fed by electric power and is excited, and the contacts S1 and S2 are closed. At that time, a motor 6 is fed by electric power to rotate, and opening operation or closing operation of a garret window is made by an opening and closing mechanism 4. With the rotation of the motor 6, an opening is advanced to an opening position set in advance, and when a limit switch 8 is turned OFF, an opening and closing control current Ic to the excitation coil C1 is released through the limit switch in a state of OFF, and the contacts S1 and S2 are opened. As a result, electric power supplied to the motor 6 is released, and the rotation is stopped. In the opening and closing controller, existing wiring L1 and L2 are appropriated with a control current circuit 22, the wiring form is equal to one to an excitation coil of a relay 18, so that the circuit wiring is simplified and, at the same time, the relay 18 is omitted to reduce the number of components. |
