| 摘要 |
PURPOSE:To prevent the malfunction of a device due to invasion of noise on a transmission line and external disturbance such as lightning surge, by providing a remote output suppression means at an output side of a remote output device. CONSTITUTION:When a start or stop instruction signal is tranamitted from a controller 1 to remote output devices 3a, 3b via signal transmitters 2a, 2b and transmission lines 4a, 4b, a suppression release signal is transmitted via a signal line 6. Thus, the function of output suppression circuit 5a, 5b is stopped and each switch is closed. Further, when the start and stop instruction signal from the controller 1 is not transmitted, since the suppression release signal is not transmitted, the function of the circuits 5a, 5b is operated. Thus, even if the devices 3a, 3b give an error signal due to external disturbance such as noise invasion and lightning surge, the device can not be malfunctioned. |
