Nameplate rating for a low-inertia 1 kW axis
Siemens 1FL2104-4AG01-1SC0 is a SIMOTICS S-1FL2 low-inertia AC servo in the 1FL2 family sized for the SINAMICS S200 drive platform. The published nameplate carries 200 V 3AC supply, Pn = 1 kW, Nn = 3000 rpm, and matched stall and rated torque figures at M0 = 3.2 Nm / Mn = 3.2 Nm on a 40 mm shaft height — meaning the motor delivers its full rated torque at zero speed as well as at rated speed, which is the working envelope a high-acceleration point-to-point axis is sized around. The shaft carries a key with tolerance N and is delivered without a holding brake, so vertical-axis applications that need a fail-safe static hold at standstill must spec the brake variant or add a redundant brake externally. Encoder feedback is the 21-bit hybrid (single-cable) connection, which folds power and feedback into one cordset rather than the two-cable topology older Siemens servos used. Protection class is IP65 with an oil seal on the shaft pass-through — the seal is the wet-side barrier, so the motor can sit on a machine deck where cutting fluid or coolant mist reaches the housing, but the shaft lip must be kept inside its rated sealing envelope and the mating connector must be seated to keep the IP65 rating valid in service.
System fit with SINAMICS S200
The product description states the matched drive as SINAMICS S200, so the motor and drive pair is the validated combination — the AS21bit single-cable hybrid connector on the motor lines up with the S200 motor-side connector, and the 200 V 3AC rating matches the S200's 200 V class bus. Substituting the 1FL2104 onto an S210 or a higher-voltage S120 line is not the documented pairing and would need a parameter and connector re-check before commissioning.
Catalog identifiers and packaging
The product is classified as product class C: products manufactured / produced to order, which cannot be reused or re-utilized or be returned against credit. That status means the motor is built to the order code on the PO — a cancelled or surplus unit cannot be returned to the channel for credit, which a contract-build buyer has to factor into the BOM planning rather than treat as a stockable returnable line.