Siemens 3RX9307-1AA00 Industrial Motor Protection Relay

Siemens 3RX9307-1AA00 is an AS-Interface power supply unit in the SIRIUS 3RG9 family, designed to power AS‑Interface bus devices on small to mid‑size automation networks. It delivers a DC output of 30 V at up to 4 A, providing a stable supply for sensors, actuators, and AS‑i gateways within a control cabinet, while isolating and decoupling the data channel from the main supply. The unit accepts an AC input that is switchable between 115 V and 230 V, enabling compatibility with common worldwide mains configurations. As part of Siemens’ AS‑Interface ecosystem, this module functions as a dedicated AS‑i segment power supply U, ensuring reliable operation of AS‑i devices on the network. Typical applications include panel‑level AS‑i sensor and actuator nodes, AS‑i gateways, and small automation subsystems where AS‑i communication and simple power delivery are required. Key specifications: Output: DC 30 V, 4 A; Input: AC 115 V / 230 V, switchable; Product family: SIRIUS 3RG9; Function: AS‑Interface power supply with data decoupling.