| 摘要 |
<p>A switch apparatus for a programmable logic controller is provided to reduce manufacturing cost by controlling various modes with a few terminals. A switch apparatus for a programmable logic controller includes an input terminal part(110), a switching device, and a data input control part(130). The input terminal part is connected to the input terminal of PLC while having a plurality of input terminals(P1~PN) and one common terminal(COM). A switching element part comprises a plurality of switching elements, and the switching element part controls connection of a plurality of input terminals and common terminal to be ON / OFF. The data input manipulation part comprises a discrimination button for distinguishing the switching element. If user presses the discrimination button, data input manipulation part performs ON / OFF operation of the corresponding to switch.</p> |
