Siemens 6ES7331-7TF00-0AB0 Analog Input Module — Legacy Replacement. Siemens 6ES7331-7TF00-0AB0 is the exact manufacturer order number for a analog input module in the SIMATIC S7-300 portfolio. Siemens describes this exact reference as: SIMATIC DP, HART analog input SM 331, 8 AI, 0/4 - 20 mA HART, for ET200M with interface IM 153-2, 20-pole. The verified manufacturer lifecycle record is PM500:Discontinued Product or end of PLM & Support.