SIMATIC S7-1200 G2: SB 1233 analog I/O, 2 AI/2 AO inputs: 2 x AI 14 bit ADC (+/-10 V, +/-5 V, +/-2.5 V or 0-20 mA/4-20 mA) outputs: 2 x AQ 14 bit DAC (+/-10 V, 0-20 mA or 4-20 mA)