Description
Core Product Summary
The SEW-EURODRIVE DFS56LTFRH1MKK (type designation DFS56L/TF/RH1M/KK) is a permanent-magnet synchronous servo motor from the DFS series. It features frame size 56, length variant L, thermal protection via thermistor (TF), RH1M resolver feedback, and KK terminal-box connection.
The motor is designed for high-dynamic positioning and speed control when operated with compatible SEW servo inverters. It belongs to the DFS family of compact synchronous servomotors used in industrial automation.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Synchronous servo motor (permanent-magnet) |
| Manufacturer | SEW-EURODRIVE |
| Type Designation | DFS56L/TF/RH1M/KK |
| Series | DFS |
| Frame Size | 56 |
| Length Variant | L |
| Feedback | RH1M resolver |
| Thermal Protection | TF (thermistor) |
| Connection | KK (terminal box) |
| Typical Standstill Torque (DFS56L) | Approx. 2 Nm |
| Typical Rated Current (DFS56L) | Approx. 2.4 A |
| Speed Class | Up to 3000 min⁻¹ (depending on winding and inverter) |
| Protection Class | IP65 (standard for DFS series) |
| Insulation Class | F |
Engineering Selection Highlights
- Compact frame size 56 synchronous servo motor for precise motion control.
- RH1M resolver provides robust absolute position feedback suitable for industrial environments.
- TF thermistor enables thermal monitoring of the motor windings.
- KK terminal-box version offers conventional screw-terminal connection instead of plug connectors.
- Designed for operation with SEW MOVIDRIVE and other compatible servo inverters.
- Permanent-magnet design delivers high torque density and dynamic response in a small package.
- Part of the established DFS series with standardized mechanical and electrical interfaces.
Detailed Product Overview
The SEW-EURODRIVE DFS56LTFRH1MKK is identified by the complete type designation DFS56L/TF/RH1M/KK. It is a permanent-magnet synchronous servo motor belonging to the DFS series.
- DFS denotes the synchronous servo motor family.
- 56 indicates frame size 56.
- L specifies the length/power variant.
- /TF indicates the presence of a thermistor for winding temperature monitoring.
- specifies the RH1M resolver as the feedback device.
- /KK indicates terminal-box connection instead of the plug-connector options (SM/SB).
According to SEW technical documentation for the DFS series, the DFS56L variant has a standstill torque in the region of 2 Nm and a rated current of approximately 2.4 A (exact values depend on the specific winding and operating point). The motor is intended for supply from a compatible SEW servo inverter and is typically operated in the 3000 min⁻¹ speed class.
The RH1M resolver provides robust, absolute position feedback that is widely used in industrial servo applications. The TF thermistor allows the connected inverter to monitor motor temperature and implement thermal protection. The KK terminal box version facilitates conventional wiring of power, resolver and thermistor circuits.
The motor is designed for continuous industrial duty in environments consistent with the IP65 protection class standard for the DFS series. It does not include a holding brake in this specific type code; brake options are designated by additional codes such as /B.
Correct parameterization of the connected servo inverter (motor data, resolver settings, thermal monitoring) is required for proper operation. Installation, wiring and commissioning must follow the official SEW operating instructions for DFS/CFM synchronous servomotors.
DFS56LTFRH1MKK
DFS56LTFRH1MKK
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Servo Inverter | SEW MOVIDRIVE® and compatible SEW servo controllers | Motor parameters must be matched to the inverter |
| Feedback | RH1M resolver | Standard SEW resolver interface |
| Thermal Sensor | TF thermistor | Connect to inverter thermal monitoring input |
| Connection | Terminal box (KK) | Power and signal terminals in terminal box |
| Mounting | Flange (standard DFS design) | Observe SEW mounting and alignment guidelines |
| Brake | Not included in this type code | /B or /BR options exist on other DFS variants |
Dimensions, Mounting & Connection Notes
The motor uses the standard DFS56 flange mounting interface. Electrical connection is via the KK terminal box (power and resolver/thermistor terminals). Installation must follow SEW guidelines for shaft alignment, coupling, and cable routing. The resolver and thermistor signals are wired according to the official SEW connection diagrams for RH1M and TF.
Applications & System Role
The DFS56L/TF/RH1M/KK serves as a high-dynamic servo motor in automated machinery. Typical applications include packaging machines, material handling systems, positioning axes, robotics peripherals, and other industrial equipment requiring precise speed and position control.
FAQ
What is the SEW DFS56LTFRH1MKK?
It is a SEW-EURODRIVE synchronous servo motor, type designation DFS56L/TF/RH1M/KK, with frame size 56, thermistor, RH1M resolver and terminal-box connection.
What does the type code mean?
DFS = synchronous servo motor series, 56L = frame size and length, TF = thermistor, RH1M = resolver, KK = terminal box.
What feedback device is fitted?
An RH1M resolver is fitted as standard on this type.
Does this motor include a brake?
No. The type code does not contain a brake designation (/B or /BR).
What is the typical torque rating?
The DFS56L variant has a standstill torque of approximately 2 Nm according to SEW documentation.
Which inverters can be used with this motor?
It is designed for use with compatible SEW servo inverters such as the MOVIDRIVE series.
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