Switchable Connection Element for Field Device Interface Reconfiguration
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Solution Overview
Problem
Field devices lack the ability to dynamically switch between functioning as an interface for sensors or actuators and a communication interface for data exchange, limiting their versatility and adaptability in connecting with different devices and systems.
Innovation Solution
The field device incorporates a switching mechanism that allows at least one connection element to be switched manually or remotely, enabling it to function as either a field device interface or a communication interface, such as a USB interface, with a programmable controller or hardware controls, and features a waterproof design with galvanic isolation for secure data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a field device has a fixed connection element configuration, then the device structure is simple and reliable, but the device lacks versatility and cannot adapt to different connection needs
Solution Approach 1:
The connection element's functionality is made dynamic through a switching mechanism that can change the electrical connection configuration between contacts and driver elements. The switching device allows the same physical connection element to be reconfigured between different interface modes (field device interface and communication interface) based on operational needs, transforming a static structure into an adaptable one.
Solution Approach 2:
The connection element is designed with multiple contacts that can serve different functions depending on the switching position. The same physical connection element can universally support both field device interface connections (for sensors/actuators) and communication interface connections (for data exchange), eliminating the need for separate dedicated connection elements for each function.
2Adaptability or versatility
If a connection element is made switchable between different interfaces, then the device versatility is improved, but the device complexity and potential reliability issues increase
Solution Approach 1:
A switching device acts as an intermediary component between the connection element's contacts and the driver elements. This intermediary selectively connects different contacts to appropriate driver elements based on the desired interface mode, providing a controlled and reliable method for interface switching without requiring complex reconfiguration of the entire system.
Solution Approach 2:
The electrical circuit is divided into distinct sections with galvanic isolation between them. The switching device segments the connection paths, allowing independent control and isolation of different interface sections. This segmentation improves reliability by preventing interference and fault propagation between the field device interface and communication interface sections.
3Adaptability or versatility
If multiple connection elements are provided for different interfaces, then the device can support multiple functions simultaneously, but the device complexity and space requirements increase
Solution Approach 1:
Instead of providing separate dedicated connection elements for field device interfaces and communication interfaces, the patent uses a single connection element with multiple contacts that can be switched between different interface configurations. This universal connection element approach reduces the number of physical connection elements needed while maintaining the ability to support multiple interface functions.
Solution Approach 2:
The patent merges the functionality of multiple separate connection elements into a single switchable connection element. By combining the field device interface contacts and communication interface contacts into one unified connection element with a switching mechanism, the design reduces spatial requirements while maintaining multi-interface capability.
4Reliability
If galvanic isolation is implemented between circuit sections, then the electrical safety and signal integrity are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The electrical circuit is segmented into isolated sections with defined galvanic boundaries. This segmentation allows each section to be designed, tested, and manufactured independently, then assembled together with standardized isolation interfaces. The modular approach to galvanic isolation actually simplifies manufacturing by reducing the need for complex cross-section wiring and troubleshooting.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a field device with a housing (10) on which one or more connection elements (2) are provided, each having electrically conductive contacts (14, 15, 16, 17), wherein the contacts (14, 15, 16, 17, 18) can be electrically connected to mating contacts of a connector. The device, which is designed in particular as a fieldbus device or terminal field device, is characterized in that the contacts (14, 15, 16, 17, 18) of at least one of the one or more connection elements (2) can be used either as an interface for the sensor or the actuator or as a standardized interface for communication with a computer.