840 D ; OP 031 Siemens Sinumerik Machine Control Board USED $825.69 Brand Siemens Model 840 D ; OP 031 MPN 840 D ; OP 031 condition Used Offered is this original USED item-there is no seen damage or repairsWe are unable to test this so-IF YOU ARENT PLEASED THIS CAN BE RETURNEDWE HAVE FAST NEXT DAY SHIPPING