According to the invention, a
system (Sys) is provided for the controlled rapid start-up and operation of a redundantly designed energy
bus (EB) intended for the fail-safe supply of an electrical
consumer (E), via which decentralized functional units (E, S, W, Bue, AC) arranged in an industrial
plant, in particular a railway
plant, can be supplied with electrical energy, wherein: a) a number of network node units (SND) are arranged sequentially between two supply points (PS1, PS2) of a ring-shaped energy
bus (EB), which provide the decentralized functional units (E) with access to the energy
bus (EB) and optionally also to a data bus (CB), b) a network node unit (SND) comprises an
operating system-supported computing unit (CPU) and an
operating system-less logic unit (FPGA), c) the network node unit (SND) further comprises a controllable switching module (S),which comprises a first switch (S1), a second switch (S2) and a third switch (S3), wherein the first and second switches (S1, S2) provide electrical access to the two power supply points (PS1, PS2) and the third switch (S3) provides electrical access to the decentralized functional unit (E), d) the
operating system-less logic unit (FPGA) is capable of performing a basic test of the power bus (EB) and controlling at least the first and second switches (S1, S2) depending on the result of the basic test of the power bus (EB) during the startup of the operating
system-supported computer unit (CPU) and / or during a malfunction of the operating
system-supported computer unit (CPU),and e) the operating system-based computing unit (CPU) controls the three switches (S1 to S3) instead of the operating system-free logic unit (FPGA) after a successful startup and / or when its utility is functioning correctly.