Siemens SIMATIC PLC 6AG1231-4HF32-4XB0 SIPLUS S7-1200 SM 1231 8AI    WITH CONFORMAL COATING    BASEDON 6ES7231-4HF32-0XB0    .    ANALOG INPUT SM 1231, 8 AI,    +/-10V, +/-5V, +/-2.5V,    OR 0-20MA/4-20 MA,    12 BIT + VORZ.    OR (13BIT ADC) 6AG12314HF324XB0