Core logic and basic preparation for Electrical control cabinet design

The task of overall configuration design for PLC control cabinet is to divide the control system into several components and assemblies based on the schematic diagram and work requirements, and clarify the incoming and outgoing line numbers and connection methods of each part, ultimately presenting them in the form of a general assembly diagram and a general wiring diagram. In terms of component division, components with similar functions should be combined, and wiring between components should be minimized as much as possible. Control appliances with close wiring relationships should be placed in the same component.

At the same time, it is necessary to achieve separation of strong and weak electricity to reduce interference, and to combine the external dimensions of PLC cabinet components with electrical appliances of similar weight for aesthetic purposes. Fragile parts that require frequent adjustment and maintenance should be placed in a centralized manner for easy maintenance.

In terms of the wiring method between components, the incoming and outgoing lines of switchgear should be connected using terminal heads. Terminal blocks or industrial connectors should be used between cabinets or cabinets and controlled equipment. Standard connectors should be used between weak current and printed board components. Transition connections inside cabinets should be strictly implemented through terminal blocks.

Electrical control cabinet

The design of electrical component layout diagrams for Electrical control cabinets must strictly follow specific physical and operational rules. In terms of space allocation, large and heavy components should be placed at the lower part of the electrical board, while heating elements should be installed at the upper or rear part. Thermal relays, with their outgoing terminals connected to motors and incoming terminals connected to contacts, should be placed at the lower part to minimize wiring and facilitate heat dissipation.

In terms of anti-interference and operational convenience, it is necessary to separate strong and weak electricity and shield them properly; The installation height of components that require frequent maintenance and repair, as well as manually operated switches and monitoring instruments, must comply with ergonomic principles.

In addition, the component layout of the Application cabinet should reserve safety gaps to achieve neatness, aesthetics, and symmetry. If trunking is used for wiring, the spacing between each row of electrical appliances should be appropriately increased to facilitate wiring. After determining the position, it is necessary to mark the spacing dimensions and tolerances according to the outline and axis of the component, and select suitable terminal blocks or connectors based on the number and specifications of incoming and outgoing lines.

The structure of the Electrical control cabinet

The electrical component wiring diagram of Standard PLC cabinet is the direct basis for guiding electrical installation, maintenance, and wiring inspection, and its drawing must strictly comply with relevant national standards. Unlike the schematic diagram, the various parts of the same electrical component such as contacts, coils, etc. in the wiring diagram must be drawn together and uniformly drawn with thin lines.

The wiring methods are divided into pre board wiring and post board wiring, and it is generally recommended to use pre board wiring; For simple control components, wiring between components can be directly drawn, while for complex components, wiring through cable trays is used, and only the wiring numbers need to be marked on each component.

In addition, the wiring diagram must clearly indicate the model, specifications, cross-sectional area, and color requirements of the wiring wires for the PLC panel cabinet. When connecting components to external circuits, connectors should be used for large cross-sectional wires entering and exiting, while others must be transitioned through terminal blocks to ensure reliable and standardized connections.

After completing the internal electrical design, the physical structure design of the Automation panel cabinet and non-standard components is equally critical. The overall size and structural type of the cabinet should be determined based on the internal component dimensions and operational requirements, and should comply with the basic structural dimension series unless otherwise specified.

Special profiles should be selected during design, and installation brackets, mounting holes, and grounding bolts should be planned well; Design a reasonable door opening method based on on-site requirements; Open ventilation holes or slots at appropriate positions in the cabinet, and install forced ventilation devices if necessary to ensure heat dissipation.

At the same time, it is necessary to consider the transportation process and design lifting hooks or bottom movable wheels. After the overall appearance of the Industrial panel cabinet is finalized, it is necessary to further refine the drawings of various parts such as doors, control panels, and base plates, and mark the processing and tolerance requirements. Finally, it is necessary to combine all drawings for the final material statistics, forming a complete consumption quota table for various materials, in order to achieve closed-loop management from design concept to production and manufacturing.

If you need to translate the above rigorous design concepts into actual high-quality Electrical control cabinet products, please feel free to contact us at any time for exclusive customized solutions. Just provide your process requirements, and our professional team will provide you with detailed technical drawings and accurate quotations.