Siemens 6ES7331-7PF01-0AB0 Analog Input Module — Legacy Replacement. Siemens 6ES7331-7PF01-0AB0 is the exact manufacturer order number for a analog input module in the SIMATIC S7-300 portfolio. Siemens describes this exact reference as: ***spare part*** SIMATIC S7-300, analog input SM 331, isolated, 2/3/4-wire, 8 AI, resistor, Pt100/200/1000 NI100/120/200/500/1000, CU10, characteristic curves according to GOST 16 (internal 24) bit, 50 ms, 1x 40-pole. The verified manufacturer lifecycle record is PM410:Product cancellation.