Siemens 6ES7636-2EB00-0AE3 PLC CPU Module — Legacy Replacement. Siemens 6ES7636-2EB00-0AE3 is the exact manufacturer order number for a plc cpu module in the SIMATIC S7-300 Connection System portfolio. Siemens describes this exact reference as: ***Spare part*** SIMATIC C7-636 Touch, Complete unit with integrated components: S7-300 CPU 315-2 DP and TP 270, 24 DI, 16 DO, 5 AI, 2 AO; Micro Memory Card and connector set required. The verified manufacturer lifecycle record is PM500:Discontinued Product or end of PLM & Support.