SIMATIC S7-1200. ANALOG INPUT. SM 1231. 4 AI. +/-10V. +/-5V. +/-2.5V. OR 0-20MA/4-20 MA. 12 BIT + SIGN BIT (13 BIT ADC)
SIMATIC S7-1200. ANALOG INPUT. SM 1231. 4 AI. +/-10V. +/-5V. +/-2.5V. +/-1.25 OR 0-20MA/4-20 MA. 15 BIT + SIGN BIT