S7-300 CPU 315-2dp Within 3 Working Days 1 Piece PLC CPU 6es7315-2ah14-0ab0 High Quality De Siemens S7-200/Siemens S7-1200/Siemens S7 - China 6es7 326-1bk02-0ab0, Siemens | Made-in-China.com
Using a redundant Siemens CPU with Elipse E3 (with example).