Programmable logic controller module assembling mode

Abstract

The invention relates to a method of assembling a programmable logic controller module. The invention is characterized in that a section is machined into that the bottom board framework height is smaller than that of the module. A motherboard with a connector socket is fixed on a bottom board framework and is provided with a cover board on the lateral side. A printed board integrated with all components is inserted form the real section of the module and is buckled with the real cover. A hook in the middle at one side of the module is hung in the corresponding slot position of the bottom board framework. The lower section of the module is pushed and the connector on the printed board is therefore fully closed with the connector socket. A fixing screw is used to assemble the module on the bottom framework. The invention is convenient in assembly and maintenance; the fixing point is at the middle and the lower section of the module, and the bottom board framework height is therefore smaller than that of the module and the module is simple and reliable in positive stop and fixing. Without any plastic positive stop frame, the combination of the modules with arbitrary quantity is easy to realize and the manufacturing cost is lower. The wire hardness is able to be fixed at a constraint point, thus the wiring is safe and reliable.

Description

technical field [0001] The invention relates to an assembly method of a programmable logic controller module, which belongs to the technical field of automation control. Background technique [0002] Programmable Logic Controller (hereinafter referred to as PLC) is an important product widely used in the field of automation control. In the existing PLC, the installation and fixing points of the module are set on the top and bottom of the module; the installation bottom plate is composed of a metal bracket and a plastic limit frame; the terminal of the module is a special terminal combined with the module; there is no restraint point for the wiring harness on the module . Its disadvantages are: [0003] 1. The installation and fixing points are set on the top and bottom of the module so that the installation bottom plate cannot be smaller than the height of the module, and the manufacturing cost is high; [0004] 2. The plastic limit frame needs to open a special mold, whi...

AI Technical Summary

Problems solved by technology

[0003] 1. The installation and fixing points are set on the top and bottom of the module so that the installation bottom plate cannot be smaller than the height of the module, and the manufacturing cost is high;

[0004] 2. The plastic limit frame needs to open a special mold, which not only increases the manufacturing cost, but also makes the expansion of the module inflexible;

[0005] 3. The types of terminal blocks are limited, and the shape of terminal blocks is large, which is difficult to meet actual needs;

[0006] 4. The wiring harness is scattered and cannot be restrained and fixed well

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