Vorrichtung,Verfahren und elektrischer Kreis zur UEberwachung einer Mehrzahl von elektrischen Steuerpulten durch einen Komputer

摘要

The multiplexing circuit disclosed includes a translator and a plurality of separate interface circuits adapted to be alternatively connected to the translator over a single buss. Each of the interface circuits is connected to a plurality of specific points at which electrical conditions are to be monitored in a corresponding one of a plurality of machine tool control panels. Monitoring of all the control panels is accomplished in conjunction with one translator multiplexed to the separate interface circuits under sequencing control of a computer connected to the translator and interface panels. The translator converts the usual 115-volt alternating current signals from the control circuits into signals usable by the computer.