Servo motor identity and SINAMICS pairing
The 1FK2104-5AF10-2MB0 is a SIMOTICS S-1FK2 HD servo motor sized for the SINAMICS S120 drive platform, rated M0 = 2.4 Nm with PN = 0.75 kW at nN = 3000 rpm on a 380-480 V bus and PN = 0.375 kW at nN = 1500 rpm on a 200-240 V bus, so the same winding covers both the high-speed 480 V line and the lower-voltage 230 V class without a rewind. It ships with an integrated holding brake, a cylindrical shaft D14 x 30 mm, an IP64 housing, an absolute encoder AM22DQC at 22-bit + 12-bit multiturn resolution, and a DRIVE-CLiQ M17 feedback connector — meaning commissioning on a SINAMICS S120 line is plug-and-configure once the motor is in the topology editor, with no separate encoder cable to land.
What the brake, encoder, and connector stack mean for the cabinet
The holding brake is fitted at the factory, so this code is the right pick when a vertical or back-drivable axis must hold position with the drive powered down — no field retrofit, no brake-only variant to cross-reference later. DRIVE-CLiQ carries both power and feedback over the same M17 cordset to the SINAMICS S120, and the AM22DQC encoder is a 22-bit single-turn + 12-bit multiturn absolute — position is retained across power cycles without a homing run after every restart.
Compliance and product-class handling
Group code R220 and product group 9021 are the Siemens commercial identifiers for ordering; product class C indicates the unit is built to order and cannot be returned against credit, so it should land in the BOM only once the SINAMICS S120 topology and shaft details are confirmed.