SIPLUS S7-300 SM 331 8AI based on 6ES7331-7PF01-0AB0 with conformal coating, 0…+60 °C, analog input isolated, 2/3/4-wire, 8 AI, Resistor, Pt100/200/1000 NI100/120/200/500/1000, CU10, characteristics according to GOST 16 (internal 24) bit, 50 ms, 1x 40-pole Just like the CPU, the analog input modules are also protected against extreme ambient conditions. Due to the 100% conformal coating they can withstand biologically, chemically and physically active substances, condensation, frost, and corrosive gases. Regardless of the conditions, your analog signals are reliably recorded.