Basic component of system is the Pi-Cubes Main Board, that board is motherboard of the system,Raspberry PI B+/2 is mounted on this board and safely attached on spacers with screws.
Main features are:
Integrated 24VDC power supply.
Integrated RTC with backup rechargeable battery
Super Capacitor Backup to allow Safe Linux shutdown.
RJ45 communication jack for thermostats, it supports RS485 communication and power to thermostats through one cable.