SIMOTICS S-1FL2 low-inertia servo, 48 mm shaft height
The SIMOTICS S-1FL2 is a low-inertia synchronous servomotor in the 1FL2 family, sized for pairing with the SINAMICS S200 drive line. The listed variant — 1FL2205-4AF01-1MB0 — is a 1.5 kW, 400 V 3AC unit with a rated speed of 3000 rpm, a standstill torque M0 of 6 Nm and a rated torque Mn of 4.6 Nm at the 48 mm shaft height. Feedback is the AM21 absolute encoder (21-bit single-turn resolution), the shaft carries a key with N tolerance, and the body is sealed to IP65 with an oil seal at the shaft exit — the housing integrity is the wet-end barrier, not the connector thread, so the mating cable gland must keep its own sealing face to hold the IP rating in washdown or coolant-mist cells.
Drive pairing and fieldbus integration
The description names SINAMICS S200 as the matching drive; the S-1FL2 / S200 pair is the integration profile an integrator needs to confirm when sizing the cabinet — drive firmware, motor ID, and encoder resolution (AM21, 21-bit) must match on the project's device trace, otherwise the auto-commissioning handshake won't close on first power-up. Power and feedback travel through the angular connector at the housing — verify the bend radius and the connector keying against the cabinet harness before pulling the cable run, because the IP65 envelope is only as good as the mated face of that connector.
Sizing notes — standstill torque vs rated torque
Standstill M0 of 6 Nm against Mn of 4.6 Nm is the margin a sizing engineer works against for cyclic duty — peak acceleration torque at the start of each index move can borrow up to M0 before thermal foldback engages, so short-stroke pick-and-place and flying-saw profiles sit comfortably inside the envelope, while continuous-torque applications closer to Mn need a thermal check on the drive side.
Lifecycle, order code, and compliance pack
Internal ordering taxonomy is Group Code R220, Product Group X0DK — carry those codes on the PO so the Siemens order-entry desk routes the line to the right production slot; packaging is 1 piece per shipper at 382 × 222 × 240 mm.