Siemens 6ES7 307-1BA01-0AA0 SIMATIC S7-300 CPU Module

6ES7307-1BA01-0AA0 (PS307) Regulated Power Supply for SIMATIC S7-300 provides a stable 24 V DC output up to 2 A to the S7-300 backplane and connected modules. It accepts automatic switching between 120 V and 230 V AC mains (50/60 Hz) to suit global installations and is designed to sit in the S7-300 rack as a primary power source for the system’s CPU and I/O components. The unit’s physical footprint is 40 × 125 × 120 mm and it weighs approximately 400 g, making it a compact, single-slot supply for compact S7-300 configurations. Typical electrical characteristics include an input current of about 0.5 A at 230 V and 0.9 A at 120 V, with a peak inrush current around 22 A and an I²t rating of 1 A²s, ensuring rapid delivery of 24 VDC power when the rack is powered. The PS307 is a standard accessory within the S7-300 ecosystem, used to reliably power CPU modules and peripheral backplane circuitry in single-rack installations.