There are four documents below for the Raspberry family of PLCs – a datasheet, and user guides for the PLC family, Raspbian setup, and the uninterruptable power supply (UPSberry). The datasheet has a couple of pages that show: the pinouts for the controller shield, list the available communications and I/O options, a basic getting started guide, precautions, and contact info. The user guide: helps you understand the layout of the modules, provides the details of how to set the switches, shows how to hook up the wires, program the controller, etc.