The Siemens SIRIUS 3RU1900-2AM71 is an electronic remote reset module designed for the 3RU2 series overload relays in frame sizes S00, S0, S2, and S3. It provides an electrical remote reset function, allowing the overload relay to be reset from a control panel or PLC output without requiring physical access to the relay itself. The control supply voltage is rated at 220-250 V, and it accepts both AC and DC supplies at 50 Hz and 60 Hz, making it flexible for global installations where line frequencies differ. Connection to the auxiliary and control circuit is via screw-type terminals, sized to accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) solid or stranded conductors, or finely stranded conductors with core end processing.
Deployment context
The 220-250 V AC/DC control supply means it can be wired into the same control transformer circuit as the contactor coil in a standard motor starter assembly, simplifying panel wiring.
RoHS compliance is indicated by the substance prohibition date of July 1, 2006, meaning it meets the original EU RoHS directive. No UL or CSA approval markings are listed in the available evidence, so verify with the factory if those certifications are required for your jurisdiction.