Siemens SIMATIC PLC 6AG1321-7BH01-2AB0 SIPLUS S7-300 SM321 - 20-POLE -25 ... +70 DGR C WITH CONFORMAL COATING EN50155 CONFORMITY BASED ON 6ES7321-7BH01-0AB0 . DIGITAL INPUT GALVANICALLY ISOLATED 16 DI; 24V DC, 1 X 20-POLE, PROCESS INTERRUPT, DIAGNOSTICS, FIT FOR ISOCHRONE MODE   6AG13217BH012AB0