SIMOTICS S-1FK2 HD servo on the S210 bus
The 1FK2104-4AF00-2SA0 is a Siemens SIMOTICS S-1FK2 HD servo motor from the family explicitly built for the SINAMICS S210 drive platform — pair the S210's drive-side cycle and the 1FK2's OCC interface on the motor side, and the closed loop runs with the cycle accuracy S210 commissioning logs are measured against. Output envelope is M0 = 1.27 Nm with PN = 0.4 kW at nN = 3000 rpm when fed from a 380–480 V bus, and PN = 0.2 kW at nN = 1500 rpm on a 200–240 V bus — the high-density winding is sized for the 480 V machine-room rail, not the 230 V panel line.
Encoder, shaft, and IP64 envelope
Feedback is an absolute encoder single-turn 22-bit (AS22DQC) over the OCC interface — 22-bit resolution gives ~19 arc-seconds per LSB, which is the floor the S210 drive reads when it locks the cyclic position; anything downstream that needs absolute multi-turn retention lives outside this motor. Mechanical interface is a D14 x 30 mm cylindrical shaft with a rotatable M17 plug, and the housing carries IP64 protection — IP64 keeps dust and splashed water out, but it is not an IP67 washdown rating, so the cabinet or shroud choice still decides whether this motor lives next to a coolant nozzle or inside a sealed enclosure.
Procurement codes and compliance posture
Lifecycle is current on the Siemens record, with Group Code R220 and Product Group 9021 — the order sits in the made-to-order product class, so the unit ships configured to the BOM line, not pulled from finished-goods stock. RoHS compliance has been on file since 01-07-06 and REACH Article 33 duty-to-inform applies via the current candidate-list statement — the documentation set the EU and UK lines ask for at receiving inspection is covered by the standard Siemens compliance pack.
Sourcing posture for the BOM line
Built-to-order configuration flows through independent distribution — specify the order code against the BOM and price/availability come back with the quote, no stock-holding claim implied.