Servo in a hot-phase line: read the EOL flag before you commission
The 1FK7103-5AF81-1YY3-ZS17: S-1FK7 motors are the rotor-and-resolver end of a Siemens SINAMICS S120 drive pairing — torque-controlled, encoder-feedback, and tuned to the drive's auto-commutation tables, which is why a stock replacement from another vendor is rarely a drop-in even when the shaft and flange match.
Sourcing posture for an EOL-hot servo
of eol_hot tells the planner that the standard Siemens quotation path has shifted — orders are filled from independent distribution and factory-surplus inventory, lot-specific and confirmed against an RFQ, not against a published price book.