| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply part noise sensing device of a PLC(Programmable Logic Controller) analog input/output module capable of sensing whether or not a noise has flowed in a power supply to be output by the power supply part of the PLC analog input/output module.SOLUTION: In a power supply part noise sensing device of a PLC analog input/output module, the sensing device includes: a capacitor for extracting a noise determination object voltage from a drive voltage to be output by a power supply part; a voltage conversion part for converting and outputting the noise determination object voltage to be output from the capacitor; a comparison part for comparing the noise determination object voltage converted by the voltage conversion part with a reference voltage; and a determination part for determining whether or not the noise determination object voltage is a noise on the basis of a result of comparison by the comparison part.SELECTED DRAWING: Figure 2 |
