Sizing the S-1FK2 HD on a SINAMICS S120 axis
The 1FK2104-6AF01-1MB0 is a SIMOTICS S-1FK2 HD servo motor from the 1FK2 family built to pair with SINAMICS S120 drives. The DRIVE-CLiQ interface on M17 means the drive recognises the motor by its electronic nameplate on plug-in, so commissioning skips the manual parameter entry that older resolver-feedback motors still demand. Stall torque M0 is 3.2 Nm and the rated point is PN = 1 kW at nN = 3000 rpm on a 380-480 V bus; on a 200-240 V bus the same frame delivers PN = 0.5 kW at nN = 1500 rpm. For sizing, the 480 V point is the one that drives the axis selection on cabinet builds — the 240 V figure is the derated path for legacy S120 line modules and should not be used to size a new machine.
Feedback, shaft, and the IP65 rating on the line
The encoder is the absolute 22-bit singleturn plus 12-bit multiturn (AM22DQC), so position is retained across power-cycle without a battery-backed reference run. That removes the home-return step from every recipe change — a real saving on indexing and packaging axes where recipe count runs into the hundreds.
Ordering paperwork: group code, product class, and compliance
On the Siemens ordering side this is Group Code R220 / Product Group 9021, and the product class is C — built to order, not returnable for credit. For a storeroom that means stocking one as a line-down spare is a deliberate decision: it's not a shelf item that can ride a return cycle, and replacement has to be quoted through the same made-to-order channel. Pack-out is one piece per carton at 452 x 250 x 267 mm, which is what the receiving dock needs to plan a handling slot.
Lifecycle posture and the sourcing path
Because it ships built-to-order under product class C, the realistic sourcing path for a procurement line is to quote the BOM quantity against the active channel — availability and lead time for the configured motor are confirmed at RFQ rather than off-the-shelf, and there is no factory-authorised distributor overstock model to lean on.