6ES7233-4HF50-0XB0 SIMATIC S7-1200 G2: SM 1233 analog I/O, 4 AI/4 AO; inputs: 4x AI 14 bit ADC (+/-10 V, +/-5 V, +/-2.5 V or 0-20 mA/4-20 mA); outputs: 4x AQ 14 bit DAC (+/-10 V, 0-20 mA or 4-20 mA)