... , Software with competitive price and big stock. SIMATIC S7-300 - Siemens PLCORDERINGPartDescriptionCPU6ES7 312-1AD10-0AB0CPU 312, 16 KB6ES7 312-1AE13-0AB0CPU ... , 10 A6ES7305-1BA80-0AA0Power Supply - PS305, 24 VDC, 2 A Siemens SIMATIC S7-300 PLC