SM331 EXTEND MODULE (6ES73317PF010AB0) SIMATIC S7-300, ANALOG INPUT SM 331, OPT. ISOL.,2/3/4 WIRE, 8AI, RESISTANCE, PT100/200/1000 NI100/120/200/500/1000, CU10, PLUS CHARACTERISTICS ACCORDING TO GOST STANDARD 16 (INTERN 24) BIT, 50MS, 1 X 40 PIN AND SIMATIC S7-300, FRONT CONNECTOR(6ES73921BM010AA0) FOR SIGNAL MODULES WITH SPRING CONTACTS, 40-PIN