How to Achieve Seamless Communication Between HMI Driver Boards and Legacy/Modern Industrial Control Systems While Maintaining Cybersecurity?

Hardware Interface Design

                        Connector Ecosystem

                Legacy Support:

                                M12 A-coded (RS485/Profibus), D-coded (Ethernet) connectors.

                        Phoenix Contact 5-position terminal blocks for 4-20mA analog.

                High-Speed Channels:

                        Samtec FireFly® micro-optical for 10G EtherCAT.

                Signal Conditioning

                        Isolation: ADuM5401 isolators (5kV) between PLC ports and HMI core.

                        Noise Filtering: Pi filters + TVS diodes on CAN Bus lines.

Software Protocol Stacks

        Legacy Protocol Support

                    Modbus Gateway:

                            Custom FPGA translating Modbus RTU ↔ TCP (supports 247+ devices per subnet).

                    Profibus Proxy:

                            Softing PB-Connect converting DPv0 to MQTT.

        Real-Time Industrial Ethernet

                    Deterministic Processing:

                                Time-Sensitive Networking (TSN) via NXP LS1028A SoC.

                    Topology Examples:

Cybersecurity Architecture

            Hardware Roots of Trust

                    Microchip ATECC608B secure element for:

                                TLS 1.3 handshake acceleration

                                Signed firmware updates

                    Network Segmentation

                                VLAN Configuration:

                                        Separate control (VLAN 10), diagnostics (VLAN 20), and guest (VLAN 30) networks.

                                Firewall Rules:

                                        Allowlist-based comms (e.g., "Permit OPC UA TCP/4840 ONLY").

Development Toolchain

            Middleware Framework

                        Containerized Stacks:

                                Dockerized CODESYS runtime for PLC logic.

                                Node-RED for IoT protocol bridging.

             Compliance Automation

                        IEC 62443-4-2 Tools:

                                Tenable OT scans for vulnerability reports.

                                 SSG checklists for STIG compliance.