What the encoder resolution and dual voltage rating actually buy you
The 1FK2104-4AF11-1SB0: SIMOTICS S-1FK2 HD servo motor, M0 = 1.27 Nm stall torque, with a holding brake and IP65 sealing on the body — the brake is integrated so the axis holds position when the drive enable is dropped, which matters on vertical axes and gravity-loaded slides where de-energised drift is not an option. The motor is dual-rated: 0.4 kW at nN = 3000 rpm on a 380-480 V supply, and 0.2 kW at nN = 1500 rpm on 200-240 V. The first envelope is the SINAMICS S120 / S210 line-voltage territory; the second is the lower-voltage drive territory, so the same motor drops into both cabinets without a re-spec. Feedback is the AS22DQC absolute encoder, single-turn, 22-bit — that resolves to roughly 4.8 million counts per revolution, which is the resolution floor the current loop is tuning against. Anything coarser in this class shows up as a quantisation ripple you can hear on a slow traverse; 22-bit single-turn is the right starting point before you need a multi-turn gearbox encoder. Connection is DRIVE-CLiQ via the M17 plug for the encoder/digital link and a separate size M17 power connector — the digital feedback cable carries motor identity, encoder data and thermal model back to the SINAMICS drive, so parameter download and motor identification are automatic on first plug-in rather than manual entry. Shaft is D19 x 40 mm with feather key; IP65 on the housing is the sealing class for the body, not the shaft seal — a through-shaft application in a washdown environment still needs the front flange seal to match the IP rating of the rest of the machine envelope.
Lifecycle stage is current and the product status is active — the motor is in normal production and not on a last-time-buy clock. The product class is C: built to order, non-returnable, non-reusable. That is standard for configured servo motors with specific encoder, brake, connector and shaft options, and it means the BOM line commits to the configured variant — swapping the encoder code or the connector size means a fresh build, not a stock substitution. Packaging is one piece per carton at 452 x 250 x 267 mm, and quantity unit is one piece — single-unit ordering is the procurement norm, not a case pack. Compliance: RoHS-compliant since 01-07-06 and REACH Art. 33 information obligation is active — the supplier provides the candidate-list disclosure on request, which is what a fab or medical line audit will ask for before signing off an incoming-goods batch. Export classification is AL:N with ECCN N_CNDU — no export licence required for the standard destination set, which simplifies cross-border shipments through independent distribution.
Ordering line identity inside the Siemens catalogue
Group code R220, product group 9021, product family ordering-data overview — these are the internal line identifiers that tie the configured motor to its price list and configurator output, so a purchasing system matching on group code picks up the right line on the PO.