SIEMENS SIMATIC PS307 6ES7 307-1EA01-0AA0 Power Supply Module AC 120V/230V | eBay
File:Siemens PS307 & ET 200M & DI & Profibus.JPG - Wikimedia Commons
Siemens 6ES7 307-1KA02-0AA0 SIMATIC S7-300 STABILIZED POWER SUPPLY PS307 INPUT: 120/230 V AC OUTPUT: DC 24 V DC/10 A: Amazon.com: Industrial & Scientific