The MPC4Mk2 ordering number PNR 601-041-Ax corresponds to the underlying module version 600-041-vvv-vvv,where “vvv” represents the hardware versions that can be used by a finished product.
The IOC4Mk2 ordering number PNR 600-043 corresponds to the underlying module version 620-024-100-1Hh, where “Hh” represents the hardware versions (“H” increments are for major modifications that can affect product interchangeability, “h” increments are for minor modifications that have no effect on interchangeability).
