Patent ID: 8242901
Filing Date: 2012-08-14
Classification: H02H

Abstract:
1. A fieldbus system, comprising: a plurality of bus line sections including bus lines; a plurality of isolating elements, at least one isolating element coupling two of the plurality of bus line sections to one another, to galvanically isolate the bus lines of the two bus line sections from one another such that a direct current is prevented from flowing between the bus lines of the two bus line sections and such that transmission of communication signals is permitted between the two bus line sections; at least one supply source for each of the bus line sections, the at least one supply source configured to supply an electrical power supply to field devices connected to a respective bus line section, the plurality of the bus line sections being connected via the isolating elements to form a series circuit; and a connection section including at least one terminal impedance, and configured to connect at least one bus line section of the plurality of bus line sections to a controller, wherein the connection section is galvanically isolated from the plurality of bus line sections and the connection section is not directly connected to a power supply source and is not directly connected to the field devices, wherein the at least one supply source is coupled via a decoupling inductance to bus lines of a corresponding bus line section.