In a robotic welding cell that assembles chassis brackets, the router is installed in the control cabinet together with the PLC and HMI. It creates a dedicated Ethernet backbone for the cell’s sensors, actuators and vision system while keeping the plant network isolated from the corporate IT infrastructure. By establishing a site‑to‑site VPN, maintenance engineers can access the cell’s controller from a remote office to diagnose faults, upload new welding programs, or perform firmware updates without physically entering the production area. The router also forwards production data to the Manufacturing Execution System, allowing real‑time monitoring of cycle times and quality metrics, which supports just‑in‑time scheduling on the shop floor. In addition, the same device can be used in the adjacent logistics lane to connect automated guided vehicles to the central warehouse management system, providing a secure link that prevents unauthorized traffic while still enabling fast data exchange. This architecture lets the welding cell operate continuously with minimal downtime and gives plant supervisors a reliable window into the line’s performance.