| 摘要 |
<p>Output voltages of a regulator A, a regulator B, and a regulator C are supplied to each load device and input to a representing-value decision logic circuit that is operated by a dedicated resident power supply. The representing-value decision logic circuit selects an output voltage that appears the most irregular of all output voltages from the regulator A, the regulator B, and the regulator C, and then sends a selection result to a selector. The selector selects only the output voltage from a regulator that outputs the output voltage that appears the most irregular and is selected by the representing-value decision logic circuit and then outputs the output voltage to a smoothing circuit. The direct current that has been smoothed by the smoothing circuit is quantized by an AD converter and then received by a system monitoring processor. Therefore, even when the secondary power supply is replaced by regulators, the same conventional configuration can be used for the circuit for voltage monitoring that includes the smoothing circuit, the AD converter, and the system monitoring processor.</p> |
