Triple-Rail DC Power PCB Design -- 2

I need a compact, production-ready PCB that accepts a single DC input and delivers three regulated rails—24 V @ 12 A, 12 V @ 12 A and 5 V @ 10 A—for an industrial-automation control panel. The board must keep those rails alive for roughly 5-10 minutes by automatically switching to a lithium-ion battery pack whenever the main supply drops.

An onboard 8051 microcontroller will continuously sense input power, drive status LEDs and, when a brown-out is detected, shut the rails down in a defined sequence after the battery grace period. I will flash the MCU here, so please include well-commented source, compiled HEX and a simple serial or GPIO interface for configuration.

Electrical safeguards are critical in the factory environment, so integrate robust overcurrent, overvoltage and short-circuit protection on every output as well as reverse-polarity protection on the battery input. Thermal considerations, adequate copper weights and clear separation of power and logic grounds all need to be reflected in the layout.

Deliverables
• Complete schematic (Altium, KiCad or Orcad)
• PCB layout and Gerber/NC drill files ready for fabrication
• Annotated BOM with part numbers in current production
• Basic test procedure confirming load capability, fail-over to battery and protection trip points
• 1 unit of working prototype

I’ll review at each milestone—schematic, PCB, firmware—to keep the project moving swiftly toward a board that can drop straight into my assembly line.