Product function requirements: This project is a custom carrier board for the Raspberry Pi Compute Module 5 (CM5). The schematic and PCB layout are already completed. The purpose of this request is to perform an engineering review and design optimization before manufacturing. The board integrates several subsystems including: • Raspberry Pi CM5 dual board-to-board connectors (100-pin) • Gigabit Ethernet interface using an RJ45 MagJack with integrated magnetics • M.2 M-Key PCIe interface intended for NVMe SSD storage • RS-485 communication interface • Industrial digital input channels • Optocoupler-isolated digital output channels • GPIO expansion headers • Status LEDs for system indication • Multiple power supply rails Main functional blocks included in the design: • VIN to 5V DC/DC power conversion stage • 12V output stage • Analog output circuitry • Digital input interface • Optocoupler-based digital outputs • CM5 high-speed interface routing • M.2 PCIe interface for NVMe SSD Performance parameter requirements: • Input voltage: 12V–24V DC • Stable and low-noise power rails suitable for CM5 operation • Proper grounding and power distribution • High-speed signal integrity for CM5 interfaces (PCIe / Ethernet) • PCIe routing suitable for NVMe SSD operation • ESD and surge protection for external interfaces • Reliable operation in electrically noisy industrial environments Use environment and application field requirements: • Industrial automation / control systems • Continuous operation environment • Operating temperature range: –20°C to 80°C • Components should preferably be rated for –40°C to +85°C where possible • Good thermal management and component derating recommended Deliverables requirements: We request an engineering review and optimization including: • Schematic review • PCB layout review • Power stage validation • High-speed signal routing verification (PCIe / Ethernet) • Design for Manufacturing (DFM) verification • Design for Assembly (DFA) optimization • Suggestions for component substitutions if needed After the review and optimization process, we request the updated design files to be delivered, including: • Updated schematic files • Updated PCB layout files • Updated BOM with alternativos to be otpimized with pcbway and jlcpcb • Gerber files • Pick-and-place files • 3D model files if available If possible, we prefer the final design files to be delivered in an open-source EDA format such as KiCad. All current project files are provided including design files, Gerbers, BOM, Pick-and-Place files, and 3D models. If any potential reliability, manufacturability, or performance issues are identified, please provide recommendations for improvement before production.