Sizing the motor against the mechanical load
The 1FK2104-5AK11-0MB0 is the SH 50-frame entry in Siemens' SIMOTICS S-1FK2 HD line, a low-inertia synchronous servo intended to pair one-to-one with a SINAMICS S120 drive module over DRIVE-CLiQ. The standstill torque M0 of 2.4 Nm is the headline number that decides whether this frame fits the axis — anything demanding continuous shaft torque above that figure needs the next frame up. Two rated-power points are listed for the same frame, which matters when the panel is fed from a 230 V feeder versus a 480 V one: PN = 1.07 kW at nN = 6000 rpm for the 380-480 V envelope, and PN = 0.75 kW at nN = 3000 rpm for the 200-240 V envelope. The motor itself is identical — the difference is what the upstream drive and DC bus can deliver, so the BOM line for the drive chassis has to be cross-checked before sign-off.
Encoder, brake, and what plugs into it
Position feedback is the absolute encoder AM22DQC, 22-bit single-turn plus 12-bit multi-turn, brought back to the drive over a DRIVE-CLiQ M17 plug — that one cable carries motor identification, position, and thermal data, so no separate encoder wiring or commissioning page per axis is needed on the controller side. The holding brake is integrated; brake logic is parameterised inside the SINAMICS drive, not loop-wired through the PLC. Mechanical fit is a cylindrical shaft D19 × 40 mm with key per the SIMOTICS 1FK2 convention, and the housing carries IP65 — so the motor can sit near the gearbox housing on a machine skid, but any direct hose-down duty in food or washdown cells still needs the next IP step up. Order quantity unit is 1 Piece, packaging quantity 1, so each motor ships in its own Siemens carton with the connectors and documentation bundled in.
Compliance and order-class flags
Group code R220, product group 9021, and product class C are the three fields a Siemens MRP or SAP export will throw back when this order code is entered — class C is the one that flags this as a configured / built-to-order line, which means substitution without a written deviation request is not a sensible path on a contract line where the customer's AVL is locked.
Production status and how to source it
Siemens lists the lifecycle stage as current and the product status as Active — this is still in series production on the standard SIMOTICS 1FK2 line, not a discontinued build. Because the motor is class C — built to order rather than stocked against a generic SKU — independent distribution handles it on an RFQ basis: price breaks, lead time, and the next available production slot are confirmed at quote, not pulled off a shelf counter.