Small Control Sysrtem with Ethernet Bus

The thesis is concerned by complex proposal and by solution of PCB (printed circuit board) for small control system with ethernet connection. This thesis is solving proposal for supply circuit issue, which means galvanic separation circuit, regulation and stabilization of voltage. For communication sensing units or other units with automatic controller is used industrial communication with RS232 and RS485 interface. Automatic controller gain information from feed system by analog and digital inputs. Activator is controlled by analog or digital outputs from microcontroller