SIMATIC S7-1500, analog input module for cell voltage measurement, AI 24xCVM HF, up to 24 bit resolution, accuracy: 0.1%, 24 channels in groups of 12, insulation voltage: 600 V DC, diagnostics, hardware interrupts, calibrate in RUN mode; delivery including infeed element, shielding bracket and shield terminal: front connector (push-in) included note: Module is not suitable for regular voltage measurement of +/- 5 V