1.27 Nm M0, DRIVE-CLiQ feedback, 1FK2 HD form factor
The Siemens 1FK2104-4AF00-0MB0 is a SIMOTICS S-1FK2 HD servo motor from the 1FK2 product family intended for SINAMICS S120 drive systems, with a stall torque M0 of 1.27 Nm and a rated power PN of 0.4 kW at nN=3000 rpm when fed from a 380-480 V bus, or 0.2 kW at nN=1500 rpm from a 200-240 V bus. The shaft is a plain cylindrical D19 x 40 mm, and feedback is an AM22DQC absolute encoder (22-bit single-turn plus 12-bit multiturn) wired back to the drive through a DRIVE-CLiQ M17 plug, with the power lead on the matching M17 size. Packaging dimensions run 452.00 x 250.00 x 267.00 mm per piece, which is the Siemens factory shipper for this frame and worth noting for any MRO storeroom slot planning where the motor arrives as a single-piece order rather than a multi-pack. The item is classed as a product manufactured to order that cannot be reused or re-credited, so each unit is a purpose-built commission rather than a pooled shelf item.
Two speed points, one winding: matching the bus voltage
The two rated operating points (0.4 kW at 3000 rpm on 380-480 V, 0.2 kW at 1500 rpm on 200-240 V) are not two separate motors — they are the same winding characterised on two different SINAMICS line voltages, so the cabinet builder only commits to one order code regardless of whether the line drops onto a 230 V or a 400 V feed. The integrator picks the speed/torque pair the application's mechanical curve actually demands, then sizes the S120 line module to whichever bus voltage the plant already runs. IP64 with a D19 x 40 mm cylindrical shaft means this is a high-dynamic (HD) servo frame intended for clean industrial cabinets and machine interiors — it is sealed against splashing and dust ingress but it is not a washdown-rated food-and-bev or outdoor face, so the motor belongs inside an enclosure or on a sheltered machine base rather than out in the wet end of a line.
Feedback and connector stack: what plugs into the drive
Feedback rides on DRIVE-CLiQ rather than a conventional resolver or analog encoder cable — the AM22DQC plugs in via the M17 signal connector on the motor back cap, and the drive side handles electronic nameplate, encoder parameterisation and commutation automatically. For the cabinet builder that removes one class of wiring error (no separate encoder screen to terminate) but it does mean the mating SINAMICS S120 control unit must have a free DRIVE-CLiQ port and the firmware must recognise this encoder type before commissioning can start. Power exits on the M17 size power connector, sized for the 0.4 kW continuous rating at the high-voltage speed point. Pre-fabricated Siemens MOTION-CONNECT power and signal cables in the matching M17/M17 geometry are the only cables that maintain both the IP64 rating at the motor face and the DRIVE-CLiQ shielding integrity; mixed-vendor cabling is where the commissioning headaches on 1FK2 builds almost always show up.
Active on Siemens books, built to order per unit
Lifecycle stage is recorded as current and the product is listed as Active in the Siemens commercial record, with no official successor on file. Because the product class is the 'manufactured to order, no return credit' category, each 1FK2104-4AF00-0MB0 ships against a fresh build slot rather than from a pooled distributor shelf — the order code is therefore the right thing to commit to the BOM, but the storeroom spare for an emergency swap is built against the same code at the time of the call, not pulled off a stocked pallet. Compliance with the RoHS substance restrictions has been in place since 01-07-2006, and REACH Art. 33 duty-to-inform applies in line with the current candidate list.
Quoting posture for a SIMOTICS 1FK2 servo on the BOM
Specifying this motor against a SINAMICS S120 build means confirming the matching power cable length, the DRIVE-CLiQ signal lead, and the S120 firmware release that recognises the AM22DQC encoder before the order is committed. The motor is built to order under the listed order code and is not a pooled shelf item, so the BOM line should carry the full 1FK2104-4AF00-0MB0 string with the encoder and connector options spelled out; pricing and the build window are confirmed against an RFQ at quote time rather than read off a fixed list.