The present disclosure refers to an agricultural system and a method of operating the system. An implement is connected to a tractor. A tractor control network (4) and an implement control network (5) are connected through a data bus (6). Control signals are transmitted over a signal line of the data bus (6). A driving power supply is provided by a tractor power supply (13) to a working unit (10b) of the implement through a driving power supply line, the tractor power supply (13) configured to provide a plurality of different driving voltages. Driving power supply control signals are received in the tractor control network (4), the driving power supply control signals being sent from the implement control network (5) over the signal line and indicating a present driving voltage. The present driving voltage is supplied over the driving power supply line to the working unit (10b).
