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Power supply device for PLC expansion module

A power supply device and expansion module technology, applied in the direction of output power conversion device, electrical components, electrical program control, etc., to achieve the effect of preventing the accumulation of leakage current and preventing erroneous actions

Pending Publication Date: 2021-07-20
LS ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the leakage current problem of this prior art power supply device for expansion modules, the inventors of the present invention have continuously studied

Method used

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  • Power supply device for PLC expansion module
  • Power supply device for PLC expansion module
  • Power supply device for PLC expansion module

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Embodiment Construction

[0024] Hereinafter, the configuration of the present invention referred to in various embodiments of the present invention and the effects obtained from the configuration will be described with reference to the drawings. Regarding known functions relevant in explaining the present invention, a detailed description thereof will be omitted when it is obvious to those skilled in the art and it is judged that it may make the gist of the present invention unclear.

[0025] The terms "first", "second", etc. may be used to describe various constituent elements, but these constituent elements should not be limited to the above terms. The above terms may only be used to distinguish one constituent element from another constituent element. For example, a "first constituent element" may be named a "second constituent element" without departing from the scope of rights of the present invention, and similarly, a "second constituent element" may also be named a "first constituent element". ...

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Abstract

The present invention relates to a power supply device for a PLC extension module, which supplies power to the PLC extension module and blocks a data signal when the power of the power supply device itself is not supplied by transmitting the data signal using a voltage converter inside the power supply device. Therefore, leakage current supplied to the inside of the power supply device by the data signal along the power supply line can be blocked, and malfunction of the expansion module power supply device can be prevented.

Description

technical field [0001] The invention relates to the leakage current blocking of a power supply device for a PLC expansion module. Background technique [0002] A PLC (Programmable Logic Unit: Programmable Logic Controller) is widely used in factory automation as a device for controlling connected devices according to user settings. [0003] Generally, a PLC consists of a basic unit (master) and various expansion modules (slave) connected to it. The expansion module operates by receiving power from the basic unit. Therefore, the number of expansion modules that can be connected to the base unit is bound to be limited by the power supply capacity of the base unit. [0004] Depending on the system configuration, the number of expansion modules to be connected may exceed the power supply capacity of the basic unit. In this case, a power supply for supplying additional power to the expansion modules is required. The expansion module uses a power supply device to connect the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
CPCG05B19/054G05B2219/1109G05B19/05H02M3/337G05B2219/15097G05B2219/15088
Inventor 金桢煜
Owner LS ELECTRIC CO LTD
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