SIPLUS S7-300 SM321 - 20-POLE -40 ... +70 DGR C WITH CONFORMAL COATING CONFORMITY WITH EN50155 T1 KAT 1 KL A/B BASED ON 6ES7321-1BH02-0AA0 . DIGITAL INPUT OPTIC. ISOLATED 16 DI, 24V DC, 1 X 20-POLE
SIPLUS S7-300 SM321 - 40-POLE -40 ... +70 DGR C WITH CONFORMAL COATING CONFORMITY TO EN50155 T1 CAT 1 CL A/B BASED ON 6ES7321-1BL00-0AA0 . DIGITAL INPUT OPTICALLY ISOLATE 32DI, 24 V DC, 1 X 40 PIN
SIPLUS S-7-300 SM321 16DI -40 ... +70 DEGREES C WITH COMFORMAL COATING BASED ON 6ES7321-1FH00-0AA0 . DIGITAL INPUT GALVANICALLY ISOLATED 16 DI, AC120/230V, 1 X 20-POLE
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