Servomotor definition and what it drives
The 1FL6090-1AC61-2AB1 is a SIMOTICS S-1FL6 low-inertia servomotor in the 1FL6 family, sized for pairing with the SINAMICS V70 and SINAMICS V90 converter platforms — the kind of motor that drops onto a small automated axis where a V90 drive sets the position loop and the motor carries the mechanical load. At its rated operating point it draws from a 3AC 400 V bus, delivers Pn=2.5 kW at Nn=2000 rpm, with a stall torque M0=15 Nm and rated torque MN=11.9 Nm — the stall/rated torque spread is what tells the integrator how much headroom the motor has for acceleration peaks before the drive hits its torque limit.
Mechanical and encoder build
The motor carries a shaft-height-90 mm frame, an angle plug for the power and feedback cabling, a feather key on the shaft, and a holding brake fitted at the factory — the brake is what locks the axis when the drive is de-energised, so any retrofit on a vertical or held-load axis must keep the brake option matched. Feedback is an incremental encoder at 2500 increments per revolution, output through the angle plug — incremental rather than absolute, so the drive needs to run the homing sequence on every power-up before the axis is allowed to move.
Environmental rating and panel integration
The housing is rated IP65 with the sealing ring fitted, which means the motor tolerates splash and dust on a machine envelope but is not rated for high-pressure washdown — adequate for typical machine-tool and light assembly environments, but a food-and-bev line would push beyond this rating.
Lifecycle and sourcing posture
Compliance record carries RoHS conformity since 01-01-18 and a REACH Article 33 candidate-list disclosure obligation — the EU environmental paperwork you would expect to see on a current-generation Siemens motion product is on file.