<p>This electromagnetic opening/closing device (A1) is provided with: a detection unit (5) for detecting the opening/closing state of a contact section (1); an abnormality determination unit (6) configured in a manner so as to determine the presence/absence of an abnormality on the basis of the opening/closing state of the contact section (1) detected by the detection unit (5) and the opening/closing state of a contact section (1) corresponding to an external command; and an output unit (8) configured in a manner so as to output the determination results of the abnormality determination unit (6) to the outside.</p>
