Wishlist Quick view SIEMENS Siemens SM 1231 Analog Input, 8AI 6ES7231-4HF50-0XB0 €110.00 SM 1231 Analog Input, 8AI SIMATIC S7-1200 G2: SM 1231 analog input, 8 AI; inputs: 8x AI 14 bit ADC (+/-10 V, +/-5 V, +/-2.5 V or 0-20 mA/4-20 mA) Datasheet: Download PDF Add to Wishlist