| 摘要 |
PURPOSE:To prevent securely a device to be controlled from malfunctioning and to simplify the constitution of a device by stopping the transmission of a control signal when a control output signal transmitter is abnormal and making a warning display. CONSTITUTION:The control output signal of the control output signal transmitter 11 is sent out of phototransistors TR11a-TR11n. A DC positive bus 12 is connected to the collectors of the TRs 11a-11n, and erroneous control output signal stopping devices 141-14n are provided between a bus 12 and a DC negative bus 13. Those devices 141-14n are provided with the 1st and the 2nd relays A1-An and B1-Bn, resistances R11-R1n and R21-R2n etc., and the emitters of the TRs 11a-11n are connected to the connection points between the relays B1-Bn and resistances R21-R2n. Further, normally opened contacts B21-B2n of the relays B1-Bn are provided to contact circuits 151-15n of controllers 161-16n, and the states of the circuits 151-15n are monitored by a trouble monitoring device 17. When the device is abnormal, the transmission of a control signal is stopped to prevent securely the device to be controlled from malfunctioning. |
