Why are there different part numbers for different voltage ranges when most IncOders accept a wide voltage range?

Earlier variants of IncOder use electronic hardware which varied according to the supply voltage. In current versions of IncOder have hardware which is common across a range of voltages. We kept the same part numbering system to avoid confusion with existing customers. This doesn’t apply to Extended Temperature product options, where the supply voltage is as specified. Further details of Extended Temperature options can be found in the IncOder product guides.