Siemens 6ES7307-1BA00-0AA0 Power Supply Module — Legacy Replacement. Siemens 6ES7307-1BA00-0AA0 is the exact manufacturer order number for a power supply module in the SIMATIC S7-300 portfolio. Siemens describes this exact reference as: SIMATIC S7-300 Regulated power supply PS307 input: 120/230 V AC, output: 24 V DC/2 A. The verified manufacturer lifecycle record is PM500:Discontinued Product or end of PLM & Support.