| 摘要 |
The present invention relates to an apparatus for detecting noise in a power supply unit of a PLC analog input/output module. The apparatus may comprise: a capacitor extracting a voltage of a noise determination object, which is a target of a noise determination process, from an operation voltage, outputted by the power supply unit; a voltage conversion unit converting the voltage of the noise determination object to output the voltage, wherein the voltage is outputted by the capacitor; a comparison unit comparing a reference voltage to the noise determination object voltage, converted by the voltage conversion unit; and a determination unit determining whether the noise determination object voltage is noise, based on the comparison result of the comparison unit. According to the present invention, an operation error rate of the PLC analog input/output module may be reduced. |
