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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) SIMATIC S7-1200 Basic Controller - flexible due to a wide variety of communication options. With signal modules you can adapt the configuration of your SIMATIC S7-1200 G2 individually to meet your requirements. For this purpose, a series of digital and analog input, output and hybrid modules is available, including fail-safe variants. Due to this detailed expansion option you can save space in the control cabinet and get the most from your hardware expenditure.