POWER SUPPLY DEVICE

摘要

To make a replacement time difference between two power supply devices as small as possible when the two power supply devices serving as double power supply devices constitute a PLC, a power supply unit includes a temperature detection unit that detects an internal temperature of the own power supply unit, and an output adjustment circuit that adjusts internal power output from the own power supply unit so as to make smaller a difference between a detected temperature by the temperature detection unit of the own power supply unit and a detected temperature by the temperature detection unit included in the other power supply unit attached to a same PLC as the PLC to which the own power supply unit is attached.

主权项

1. A power supply device that is incorporated in a programmable controller (PLC) as one of double power supply devices, where each of the double power supply devices generates internal power of the PLC from alternating-current commercial power and outputs the internal power, and the power supply device being an own power supply device, the power supply device comprising:
a degradation-state calculation unit that calculates degradation state information on a life-limited component included in the own power supply device; and an output adjustment circuit that adjusts an internal power output from the own power supply device so as to make smaller a time lag between a time at which the life-limited component included in the own power supply device becomes unusable and a time at which the life-limited component included in the other power supply device becomes unusable based on the degradation state information calculated by the degradation-state calculation unit of the own power supply device and degradation state information calculated by a degradation-state calculation unit of the other power supply device attached to a same PLC as the PLC to which the own power supply device is attached.