| 摘要 |
<P>PROBLEM TO BE SOLVED: To self-diagnose the presence or absence of abnormality and notify the outside of the diagnosis. <P>SOLUTION: An electromagnetic switch A1 comprises: a detection unit 5 which detects an opening/closing state of a contact part 1; an abnormality determination unit 6 which determines the presence or absence of abnormality based on the opening/closing state of the contact part 1 detected by the detection unit 5 and an opening/closing state of the contact part 1 corresponding to a command from the outside; and an output unit 8 which outputs a result of determination by the abnormality determination unit 6 to the outside. Thus, the electromagnetic switch A1 can self-diagnose the presence or absence of abnormality so as to notify the outside of the diagnosis. Consequently, the abnormality (failure) of the electromagnetic switch A1 can be monitored more easily because an apparatus incorporating the electromagnetic switch A1 no longer needs to detect the abnormality of the contact part 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
