Modular Master Unit Layout for Multi-Station PLC Wiring
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Solution Overview
Problem
In existing programmable logic controller systems, connecting multiple stations requires operators to manually wire connection members to bypass I/O units, which is inefficient and prone to errors.
Innovation Solution
A master unit is designed with a modular structure, including a master processing circuit, connectors, a branch-line terminal, and a power supply unit, allowing for connection to other master units and I/O units without detouring through multiple I/O units, enabling efficient signal transmission and reducing maintenance complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the operator connects master units by wiring connection members to bypass I/O units, then multiple stations can be connected, but the wiring becomes complex and time-consuming
Solution Approach 1:
The master unit is divided into a main module and a connector module that can be separated. The connector module includes the first connector and first connection terminal, while the main module includes the master processing circuit, second connector, branch-line terminal, and power supply unit. This segmentation allows the connector to be independently connected to subsequent master units without requiring complex bypass wiring through I/O units.
Solution Approach 2:
The first connection terminal acts as an intermediary that directly connects the first connector to the master processing circuit through the I/O unit. This intermediary connection allows signal transmission between master units without requiring the connection member to physically bypass the I/O units, simplifying the wiring structure.
2Adaptability or versatility
If the operator manually wires connection members to connect master units, then stations can be connected, but the operation time increases
Solution Approach 1:
By separating the master unit into modular components with dedicated connection terminals, the system enables quicker assembly and connection operations. The connector module can be pre-assembled and rapidly attached to subsequent master units without time-consuming bypass wiring.
Solution Approach 2:
The first connection terminal is pre-configured within the master unit structure, allowing the connector to be directly connected to subsequent master units without requiring on-site wiring operations to bypass I/O units, thereby reducing connection time.
3Adaptability or versatility
If connection members bypass I/O units to connect master units, then stations can be connected, but maintenance complexity increases
Solution Approach 1:
The modular separation of the connector module from the main module allows for independent maintenance and replacement of connection components. The first connector and first connection terminal can be serviced without affecting the master processing circuit or requiring complex tracing of bypass wiring through multiple I/O units.
Data Source
AI summary
A master unit for transmitting signals to devices connected to I/O units is divided into: a connector module having a first connector and a main module having a master processing circuit, a second connector, a branch terminal, and a power supply part. The second connector and the master processing circuit are connected by first connection terminals provided to the connector module and the main module.