Siemens 3RF2900-0EA18 Converter Control

Siemens 3RF2900-0EA18 Converter Control is a Sirius 3RF29 function module that supplies a 24 V AC/DC control voltage for semiconductor relays, contactors, and solid-state relays used in automation cabinets. It is designed to drive external switching devices and supports a main circuit current range of approximately 10 to 90 A, enabling reliable control of mid- to high-current loads from a 24 V control source. The module is offered as a plug‑in converter control with clip‑on mounting for Siemens Sirius equipment and is documented under the MLFB 3RF2900-0EA18 designation in Siemens' product catalog and datasheets. It is intended for use where a dedicated 24 V control supply is required to energize relays or SSRs without routing coil current through the main controller.