| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electromagnetic contactor in which a power can be re-inputted by feedback of a state of the electromagnetic contactor, so that even if a discharge phenomenon is caused by an external shock at a field site where vibration and the like is severe, a potential loss that may occur at the factory management system can be minimized. <P>SOLUTION: The electromagnetic contactor includes: an operation power supply unit for inputting an operation power; an electromagnetic switch driving unit for receiving a power supplied from the operation power supply unit to drive a power supply of a load; a switching unit to be switched with a pulse signal to drive the electromagnetic switch driving unit; an operation state determination unit for determining whether the electromagnetic contactor is in an opened state or in a closed state; an input voltage sensing unit for sensing an amplitude of an input voltage supplied from the operation power supply unit; and an input signal generation unit generating an input signal for determining whether input to the electromagnetic contactor is possible or not, on the basis of a determined state by the operation state determination unit and the sensed amplitude by the input voltage sensing unit. <P>COPYRIGHT: (C)2013,JPO&INPIT |
