Description

The DFS56L/TF/RH1M/KK SEW is a highly engineered, application-specific variant of the MOVITRAC® LTE frequency inverter, a cornerstone of SEW-EURODRIVE’s comprehensive drive solutions. This model is meticulously configured for demanding applications requiring precise speed control of three-phase asynchronous motors. The complete model code reveals its specific build: a DFS56L chassis, equipped with a built-in braking transistor (TF) for effective deceleration and braking of high-inertia loads, a specific control board and software suite (RH1M), and a factory-set configuration or option kit (KK). The core value of the DFS56L/TF/RH1M/KK SEW lies in its out-of-the-box readiness for complex material handling and processing tasks, reducing engineering and commissioning time while delivering robust and reliable performance in continuous operation.

As part of the MOVITRAC® LTE series, this inverter is designed for ease of use and integration. It excels in conveyor systems, packaging machinery, and other industrial applications where dynamic control and rapid cycling are paramount. The inclusion of the braking transistor is a critical feature, allowing the drive to efficiently manage regenerative energy generated during motor deceleration, preventing DC bus overvoltage faults and ensuring controlled, precise stopping. The DFS56L/TF/RH1M/KK SEW is more than just a drive; it is a pre-optimized solution that embodies SEW-EURODRIVE’s philosophy of providing “Driven by Quality” components that enhance overall machine performance and reliability.

DFS56L/TF/RH1M/KK SEW

Technical Specifications

Main Features and Advantages

The DFS56L/TF/RH1M/KK SEW is distinguished by its application-ready configuration and robust design. The integrated braking transistor (TF) is a standout feature, providing robust braking torque without the need for an external braking unit in many applications. This simplifies cabinet design, reduces wiring, and lowers the total cost of ownership. The drive offers superior control performance through its sensorless vector control mode, which delivers high starting torque and excellent speed regulation, even at low speeds, ensuring consistent process quality without the cost and complexity of a feedback encoder.

Its user-friendly design is another significant advantage. The DFS56L/TF/RH1M/KK SEW can be quickly commissioned using the intuitive DIP switches and potentiometers on the control board or via PC software for more complex setups. The pre-loaded configuration (KK) means it arrives ready for a specific type of application, drastically reducing setup time and potential for parameterization errors. The robust housing and convection cooling make it exceptionally reliable, eliminating a common point of failure—the cooling fan—and allowing for operation in dusty environments where fans can clog. This combination of ready-to-run features, high performance, and simple maintenance makes the DFS56L/TF/RH1M/KK SEW an exceptionally competitive and valuable drive solution.

Application Field

The DFS56L/TF/RH1M/KK SEW is ideally suited for a vast array of material handling and processing applications within industrial automation. It is the driving force behind conveyor systems of all types, including belt conveyors, roller conveyors, and chain drives, where its braking capability ensures smooth stopping and prevents material rollback on inclined sections. In packaging machinery, such as filling machines, wrappers, and palletizers, the precise speed control of the DFS56L/TF/RH1M/KK SEW guarantees accurate positioning and synchronization of moving parts.

Furthermore, it finds extensive use in the food and beverage industry on mixers, agitators, and pumps, and in the automotive sector on assembly line machinery, test stands, and transfer lines. Any application that involves controlling a standard three-phase asynchronous motor in the 5.5kW range, requires frequent start-stop cycles, demands controlled deceleration, or operates in an environment where reliability is critical is a perfect candidate for the DFS56L/TF/RH1M/KK SEW. Its versatility and pre-configured nature make it a preferred choice for OEMs and end-users alike for both new installations and modernization projects.

Related Products

SEW DFT56L…: A variant without the integrated braking transistor, for applications without high braking demands.

SEW MOVIMOT®: The classic compact drive-motor unit, an alternative integrated solution.

SEW MOVIGEAR®: A mechatronic drive system integrating gearmotor, inverter, and controller into a single unit.

SEW MOVIDRIVE® B: A application-oriented inverter for more complex motion tasks requiring positioning.

SEW AS Series Motors: The range of asynchronous motors, such as the AS77L or AS87L, designed to be perfectly matched with this drive.

SEW OPC -01: The optional operator panel for quick parameterization and control of the drive.

SEW PC Software (MOVITOOLS): The comprehensive engineering tool for configuring, commissioning, and diagnosing SEW drives.

Installation and Maintenance

Pre-installation preparation: Before installing the DFS56L/TF/RH1M/KK SEW, verify that the motor’s power and current ratings are compatible with the drive’s 5.5kW, 12.5A output. Ensure the electrical supply voltage (380-480VAC) is stable and matches the drive’s rating. The mounting location must be vertical on a flat, level surface to allow for proper convection cooling, with the minimum clearances around the unit as specified in the manual. Check that the braking resistor (if an external one is required for the specific application) is correctly sized and connected to the designated terminals.

Maintenance recommendations: To ensure the long-term reliability of the DFS56L/TF/RH1M/KK SEW, perform regular visual inspections for any signs of dust accumulation, corrosion, or loose wiring connections. Keep the heat sink fins clean and unobstructed to maintain optimal thermal performance. Due to its fanless design, particular attention should be paid to ensuring ambient temperatures do not exceed the specified limits. Periodically check the tightness of all power and control connections. Utilize the drive’s built-in fault log and monitoring parameters, accessible via the integrated keypad or PC software, for proactive maintenance and troubleshooting.