Re: MILL Plus IT TNC530 CC 422 and MC422 id nr 359 652-02 is faulty
Dear Rana Ali,
You might want to check on the cause of failure before directly trying to replace the unit- you might end up frying the second unit too.
As for the compatibility, both the ID Nrs mentioned are for CC422 units, 359 651 02 is with 6 control loops and the other with 7 control loops. They should be interchangeable. However, if you are looking at adding control loops to your current controller that isn't as simple as your SIK and MC422 needs to be supporting this- license and additional position loop feedback. CC422 takes care of the speed control loop, not position control loop (to the best of my understanding).
If you are going ahead with this replacement, remember to be careful as to the port addressing for your axis outputs. I know how this is handled with the iTNC530/TNC426 but I don't know how this is done with the Millplus.