Programmable logic controller
AssigneeOMRON Corporation
InventorsHiroaki UEDA, Hideki HARADA, Daisuke WAKABAYASHI
Life of this patent
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Abstract
A power supply circuit in a PLC includes a first node that receives a DC voltage with a first level, a second node that outputs a voltage for driving a control unit, wiring connecting the first and second nodes, a first rectifier on the wiring having a forward direction from the first node to the second node, a charger for charging and discharging, a first converter that converts a discharging voltage from the charger into a DC voltage with a second level lower than the first level and outputs the voltage, and a second rectifier connected between an output of the first converter and the second node to have a forward direction from the first converter to the second node.
Claims6
A programmable logic controller, comprising:
- a control unit configured to control a target device;
- and
- a power supply circuit,
- the power supply circuit including
- a first node configured to receive a DC voltage with a first level,
- a second node configured to output a voltage for driving the control unit,
- wiring connecting the first node and the second node,
- a first rectifier arranged on the wiring to have a forward direction from the first node to the second node,
- a charger configured to perform charging and discharging,
- a first converter configured to convert a discharging voltage output from the charger into a DC voltage with a second level that is lower than the first level, and output the DC voltage, and
- a second rectifier connected between an output of the first converter and the second node to have a forward direction from the first converter to the second node.
Dependencies are inferred from the claim text.