Embedded Switch Fabric in I/O Modules for Secure Field Connectivity
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Solution Overview
Problem
Industrial control systems face vulnerabilities due to external multi-port switches that can compromise security and reliability, especially in high-throughput and high-security industrial communications.
Innovation Solution
An input/output module with multi-channel switching capability is embedded within the communications backplane, featuring serial and parallel communications ports to securely connect field devices and control modules, supporting various communication standards like OPC UA, PROFIBUS, and Ethernet, while ensuring secure authentication and power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If external multi-port switches are used for connectivity, then device complexity is reduced, but security and reliability deteriorate
Solution Approach 1:
The patent extracts the switching function from external multi-port switches and relocates it inside the I/O module. This removes the vulnerable external switching component while maintaining the connectivity management capability, thereby improving security and reliability without significantly increasing device complexity.
Solution Approach 2:
The switch fabric is nested within the I/O module, creating a hierarchical structure where the switching capability is embedded inside the existing module. This nested architecture allows the system to maintain connectivity management while enhancing security by eliminating external switching points of failure.
2Adaptability or versatility
If multiple communication channels are integrated in the I/O module, then connectivity is improved, but device complexity increases
Solution Approach 1:
The I/O module is designed with multi-functionality by integrating multiple communication channels (serial and parallel) and a switch fabric within a single module. This universal design allows the module to handle various communication protocols and connectivity requirements without requiring separate dedicated components for each function.
Solution Approach 2:
The patent merges multiple communication channels and the switching fabric into a single integrated I/O module. This combination consolidates what would traditionally require multiple separate components, achieving improved connectivity while managing complexity through integration rather than multiplication of parts.
3Reliability
If switch fabric is embedded within I/O module, then security is improved, but manufacturing complexity increases
Solution Approach 1:
The switch fabric is pre-integrated into the I/O module during manufacturing, creating a pre-assembled secure unit. This preliminary integration ensures that the security-enhancing switching component is already in place and properly configured before the module is installed in the field, simplifying deployment while maintaining security.
Data Source
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AI summary
The present disclosure is directed to an input/output module. In some embodiments, the input/output module includes: a plurality of communication channels, each channel of the plurality of communication channels configured to connect to one or more field devices; switch fabric configured to selectively facilitate connectivity between an external control module and the one or more field devices via the plurality of communication channels; a serial communications port configured for connecting the input/output module to the control module in parallel with a second input/output module, the serial communications port configured for transmitting information between the input/output module and the control module; and a parallel communications port configured for separately connecting the input/output module to the control module, the parallel communications port configured for transmitting information between the input/output module and the control module, and transmitting information between the input/output module and the second input/output module.