Simodrive 610 Spares question.

I know that this question might be a little dated but I am hoping someone here may know. We are purchasing a used machine and it has a rack of Siemens Simodrive 610 servo amps. I don't have any previous experience with these drives and I have not been able to locate much info on these drives since they have been discontinued for some time now. I have been asked to start getting spares for this machine to keep in stock. Now looking at the part numbers for each card (ie. 6SC6170-0FC51 462 017.9052.51 E F G) the first 12 digits are definitely significant and I have found spares matching to this point what I am not sure of is if there is significance to the last 15 digits some cards I can match the entire number but some I cannot and I am not sure if they are just manufacturing numbers or if they are some kind of option coding. I am trying to avoid buying a bunch of cards and then have them not work for this machine. So if anyone knows what these numbers mean I would greatly appreciate the help.

Thanks
Andy