SM331 EXTEND MODULE (6ES73317PF110AB0) SIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY ISOLATATED, 8 AI THERMOCOUPLE, TYPE B, E, J, K, L, N, R, S, T TXK/TXK(L) ACCORDING GOST 16 BIT, 50 MS, 1 X 40 PIN AND SIMATIC S7-300, FRONT CONNECTOR (6ES73921BM010AA0) FOR SIGNAL MODULES WITH SPRING CONTACTS, 40-PIN