text: <s>[INST] PowerFlex 525 Sinking/Sourcing Inputs Summary: Sinking/Sourcing appears backwards in wiring schematic.In every other Rockwell product, a sinking input switches high when connected to positive voltage, and a sourcing input switches high when connected to ground or common. However, that appears completely backwards according to the schematic below. Is there any reason Rockwell decided to reverse this nomenclature? [/INST] I think the problem lies with Rockwell's incomplete explanation of the schematic. Your definition of sinking / sourcing inputs is correct, and that is what the digital input selector switch does, if you ignore the wiring outside the drive schematic footprint. The confusion, I think, arises with the typical SRC wiring and typical SNK wiring labels for the circuits outside the drive footprint (on the right). If you read those headings as this is source wiring which feeds sinking inputs and this is sinking wiring which feeds sourcing inputs then the schematic makes sense and is consistent with your definition and with all other Rockwell products. It is simply this less than fully defined schematic that causes the problem. \\n </s>