Field Device Power Distribution via Ethernet
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Solution Overview
Problem
Existing field devices in industrial measuring require complex and costly power supply systems due to separate power sources for digital and analogue interfaces, increasing installation and maintenance costs.
Innovation Solution
The field device derives power for its digital and analogue interfaces from the Ethernet interface using Power over Ethernet (POE) capable switches, eliminating the need for separate power supplies and simplifying installation through a single cable connection for both data communication and power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power supplies are used for digital and analogue interfaces, then each interface can be powered independently, but the overall power supply system becomes complex and costly
Solution Approach 1:
The patent combines multiple power supply functions into a single unified power supply unit that serves both digital and analogue interfaces. This consolidation reduces the overall number of power supplies from multiple separate units to one integrated unit, thereby simplifying the power supply system architecture while maintaining the ability to independently power different interface types through internal power distribution circuits.
2Ease of operation
If separate power supplies are used for each interface, then power can be provided to each interface independently, but installation and maintenance costs increase
Solution Approach 1:
By merging multiple power supply units into one integrated power supply with internal power distribution capabilities, the patent reduces installation complexity and maintenance requirements. The unified design eliminates the need to install and configure multiple separate power supplies, reducing both initial installation costs and ongoing maintenance expenses while preserving independent power control through internal circuitry.
Solution Approach 2:
The single power supply unit is designed with multi-functionality to serve multiple interface types (digital and analogue) simultaneously. It incorporates universal power distribution capabilities that can independently power different interface types through internal switching and regulation circuits, eliminating the need for separate dedicated power supplies for each interface type.
3Adaptability or versatility
If multiple power supplies are used for digital and analogue interfaces, then each interface type can be powered separately, but the field device requires more external power sources and wiring
Solution Approach 1:
The patent integrates multiple power supply functions into a single external power source that connects to the field device through one unified connection. This consolidated power supply includes internal power distribution circuits that can independently power both digital and analogue interfaces, thereby reducing the number of external power sources and wiring connections required while maintaining adaptability to different interface types.
Solution Approach 2:
The external power supply is designed as a universal multi-functional unit that can simultaneously provide power to multiple different interface types within the field device. It incorporates adaptive power distribution capabilities that automatically or manually allocate power to digital and analogue interfaces as needed, eliminating the requirement for separate dedicated external power sources for each interface type.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces costs and simplifies the setup and installation of field devices by leveraging existing network structures, allowing for easier retrofitting and reducing the need for external power sources and electrical wiring.
Implementation Method 1
power for the one or more digital and/or analog interfaces is provided from the one or more POE capable switches
Data Source
Figure 1
Figure 2
AI summary
The present invention relates a field device, comprising: one or more digital and/or analogue interfaces; and an Ethernet interface. The field device is configured such that power for the one or more digital and/or analogue interfaces is power derived from power for the Ethernet interface.