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SEW-EURODRIVE DFS56LTFRH1MKK

Product Name:​ DFS56L/TF/RH1M/KK AC synchronous servo motor, option code DFS56LTFRH1MKK.
Product Introduction:​ DFS56L is a compact SEW synchronous servo motor for high-dynamic positioning, speed control and multi-axis motion. The code TF denotes integrated thermal protection, RH1M denotes resolver feedback, and KK denotes terminal-box or connector arrangement according to the ordered configuration.

Detailed content

Technical Specifications:​ 400 VAC nominal winding; maximum speed 3000 rpm; approximately 2.4 A current tier; integrated thermal sensor/PTC under TF; resolver feedback under RH1M; terminal or connector outlet under KK; 3-phase AC synchronous design.
Function Features:​ High dynamic stiffness; closed-loop commutation through resolver; thermal protection trip support in the drive; compact flange for tight machine layouts; compatible with SEW MOVIDRIVE and MOVIAXIS servo inverters and with MOVI-C drive ecosystems where the project order defines that integration.
Application Scenarios:​ Precision indexing; robotic axes; packaging machinery; printing and converting; automated assembly with rapid start-stop profiles.
Performance Parameters:​ 3000 rpm maximum speed; response and torque ripple determined by drive amplifier, resolver resolution and load inertia; thermal protection threshold set by PTC characteristic and inverter evaluation.
Material Composition:​ Laminated or stacked stator assembly, rare-earth rotor magnets, aluminum or cast servo housing according to frame, resolver assembly, PTC sensor, enameled winding insulation.
Structural Characteristics:​ Cylindrical servo frame with output shaft, resolver mounted on the rear or within the shaft end, terminal box or plug connector under KK, mounting flange for direct coupling or gearbox.
Working Principle:​ The drive supplies 3-phase AC to the stator; rotor position is measured by the resolver and fed back to the servo controller; the controller adjusts current vectors for torque, speed or position; the PTC monitors winding temperature and triggers protection through the inverter.
Installation Requirements:​ Align shaft and coupling without exceeding radial or axial load limits; use SEW-compatible resolver cable with proper shielding; connect the PTC circuit to the inverter thermal input; mount in a clean, ventilated environment or use the defined IP-rated package for harsh duty.
Usage Precautions:​ Never bypass the thermal sensor circuit; verify resolver phasing and shielding before first run; confirm inverter current rating against the 2.4 A nominal tier; if the procurement document defines DFS as a MOVI-C decentralized drive set rather than a bare motor, confirm voltage, power, communication and IP rating separately because those drive packages use different electrical data.

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