Modul analogic I/O pentru automat programabil (PLC) SIMATIC S7-1500, SM531, 4AI, U/I/RTD/TC, 24VDC, ST, 16 biti, 4 canale in grupuri de 8, 2 canale pentru RTD, 4 analog inputs, ±10 V, ±5 V, ±2.5 V, ±1 V, ±500 mV, ±250 mV, ±80 mV, ±50 mV, 1...5 V, 0/4...20 mA, ±20 mA, thermocouples type B, E, J, K, N, R, S, T, resistance thermometers Ni 100, Ni 1000, LG-Ni 1000, Pt100, Pt1000, Pt250, Pt500, resistors 0...150/300/600/6000 ohms; diagnostic, cu conector conexiune cu arc, latime 25mm, 6ES7531-7QD00-0AB0, Siemens