In order to detect interferences in the long run on a Foundation™ fieldbus segment, Turck has developed the Foundation™ fieldbus Diagnostic Power Conditioner system (DPC_System). The DPC system is designed to support the commissioning process of a fielbus system and above all to detect creeping changes within a single fieldbus segment over a long period and to prevent possible interferences or even failures with adequate alarm signals. This system provides redundant suppy for up to 16 segments with up to 800mA output current and 30 VDC output voltage