| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a disconnection detecting device for detecting the presence or absence of disconnection between a device outputting current signals in a PLC analog current output module and external equipment to which the current signals are inputted.SOLUTION: A disconnection detecting device comprises a monitor that generates a different voltage depending on whether or not a current signal inputted from a current signal output device is applied to external equipment, a reference voltage generator that generates a reference voltage, a comparator that outputs a voltage according to the result of comparison of the voltage generated by the monitor with the reference voltage, and a switch that outputs a disconnection detecting signal on the basis of the voltage outputted from the comparator.</p> |
