Mounting on a SINAMICS S210 axis
The 1FK2104-4AK01-1MA0 is a SIMOTICS S-1FK2 HD servo from the Siemens 1FK2 family, built to pair with a SINAMICS S210 drive in a single-axis positioning or indexing application (cites:,). Held torque M0 is 1.27 Nm, with PN = 0.6 kW reached at nN = 6000 rpm on a 380-480 V bus and PN = 0.4 kW at nN = 3000 rpm on 200-240 V — the drive-selecting voltage band effectively picks one of the two power points (cites:). Holding it to a gearhead or coupling is a D19 × 40 mm shaft with feather key, so the mating pulley, pinion or coupling must accept that shaft diameter and a parallel-key seat before the BOM line is committed (cites:).
Encoder, connector and sealing on the motor side
Feedback is an absolute encoder AM22DQC at 22-bit single-turn plus 12-bit multi-turn, which lets the drive retain absolute position through power cycles — commissioning does not need a homing sequence on every re-enable, but the absolute-encoder battery / backup parameterisation on the S210 still has to be set on first commission (cites:). The power and signal exit through a rotatable M17 plug with an OCC interface, which means the lead dress can be aimed at the cabinet entry without re-terminating the cable gland during installation (cites:). The motor carries an IP65 rating on the housing and shaft seal, so the unit is suited to cabinet-exterior mounting where coolant splash or airborne oil is present — the IP ceiling is the sealing washer on the mating connector, not the housing alone (cites:).
Compliance, packaging and planning posture
The motor has been RoHS-compliant since 01-07-06 and carries a REACH Art. 33 candidate-list declaration, which covers the customary EU conformity evidence for industrial motor shipments (cites:,). Siemens lists this part in product class C — produced to order, not returnable against credit — so spec changes or cancellation terms need to be settled before the PO is released, not at goods-in (cites:).