What the Step C designation means for your BOM
The 6ES7195-0BF20-0XA0 is a Siemens SIMATIC DP ASIC DPC31 Step C — a slave ASIC with an integrated processor kernel for PROFIBUS DP networks. The key note on this part: it is NOT compatible with DPC31 Step B variants, so if your existing design or replacement BOM references the earlier Step B silicon, this Step C will not drop in without a firmware or hardware revision.