Application context for the 1FK2 frame
The Siemens 1FK2204-6AF01-1MB0 is a SIMOTICS S-1FK2 CT synchronous servo motor from the 1FK2 family, sized to pair with the SINAMICS S120 drive line over a DRIVE-CLiQ M17 plug — the feedback and power both land on M17 connectors, which keeps the cabinet-side wiring to one cable family on a SINAMICS S120 build. With a stall torque M0 of 3.2 Nm and a rated power PN of 1 kW at nN=3000 rpm on a 380–480 V bus (0.5 kW at 1500 rpm on 200–240 V), the 1FK2 frame is the natural fit where a compact servomotor drives a smaller axis — packaging machinery, small-format converting, or a feeder axis on a machine tool — without stepping up to a larger 1FT or 1FK7 frame.
Encoder and shaft detail
The feedback stack on this build is the AM22DQC absolute encoder at 22-bit single-turn plus 12-bit multiturn resolution, which is the resolution bracket typically required when the downstream SINAMICS controller is asked to hold absolute position without a battery-backed reference on power-up. The shaft is D19x40 mm with a feather key, meaning the motor mounts into a standard servo coupling or gearbox input keyed to a 19 mm bore — the machine-side coupling has to match both the diameter and the key profile to avoid introducing a second keyway on the customer end of the line.
Cabinet-side environment and ratings
Degree of protection is IP65 on the motor body, which is the rating a 1FK2 carries when it sits close to the process — gantry slideways, a washdown-adjacent zone, or a feeder where coolant mist is present — but it is NOT a fully sealed submersible rating, so the cable gland at the DRIVE-CLiQ M17 plug must be torqued to the specification on the machine drawing for the IP65 envelope to hold. Product class C (made-to-order, non-returnable) is the contractual posture on this code — once the factory cuts the shaft and encoder stack to the orderable configuration it cannot be reused or returned, which is the right disposition to put on the contract manufacturer's AVL because a cancellation becomes a sunk unit rather than a returnable stock line.
Procurement codes and lifecycle
Group Code R220 and Product Group 9021 are the internal Siemens ordering codes a contract manufacturer sees on the PO line and the packing slip — they have to match the AVL entry exactly, because Group Code drift usually means a different frame size or winding was sourced without a formal deviation request.