The Siemens 6RY1803-0CA04 is a Field Supply Board (also referred to as an excitation board or field power supply board) identified by the PCB part number C98043-A7115-L12 . This module serves as a critical spare part for Siemens industrial drive systems, providing regulated field/excitation power for DC motors and drive power sections.
The board is commonly found in Siemens drive platforms including SINAMICS DCM, Dynavert, and certain SIMOREG series DC drives . As a genuine Siemens active product (PLM status PM300), it remains supported and available through Siemens' service and spare parts channels .
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