Shaft, encoder, and the two connectors on the back
The 1FK2104-6AF00-1SB0 ships as a SIMOTICS S-1FK2 HD servo with a D19x40 mm shaft and feather key, an AS22DQC single-turn 22-bit absolute encoder on the rear, and M17 connectors for both the power leads and the DRIVE-CLiQ signal cable — meaning the motor drops onto a SINAMICS S120 line without an external encoder cable or third-party feedback adapter, and the keyed shaft sets the mechanical coupling choice before the cabinet layout is finalized. IP64 sealing on the housing means the body tolerates dust and splashed water but is not rated for washdown; the encoder and connector faces are the wet-side boundary, so the cordset glands carry the real sealing load once installed.
Two voltage rails, one motor — what the rating actually means
Siemens rates this frame at PN = 1 kW on a 380–480 V supply at nN = 3000 rpm, and PN = 0.5 kW on a 200–240 V supply at nN = 1500 rpm — the lower rail is the same physical motor running at half flux and half speed, not a derated variant, so a 230 V cabinet install is supported on the same order code without re-engineering the mechanical side. M0 = 3.2 Nm sets the stall torque the drive must command during acceleration peaks; the SINAMICS S120 controller should be configured against this figure rather than the continuous PN, because machine accel/decel cycles will pull closer to M0 than to rated load.
Compliance, classification, and what 'made to order' means for the BOM
The motor is listed under product class C — manufactured to order with no return-for-credit path — and ships as a single-piece unit in its own carton sized 452 x 250 x 267 mm, which is the planning reality for stocking: this is not a shelf item that goes into a generic inventory bin, it is a configured BOM line that ties to the SINAMICS S120 topology.