DFS56H/TF/RH1M/KK Synchronous Servo Motor SEW‑EURODRIVE – DFS Series
May 28, 2026

DFS56H/TF/RH1M/KK Synchronous Servo Motor SEW‑EURODRIVE – DFS Series

The DFS56H/TF/RH1M/KK is a compact, high‑performance synchronous servo motor from the SEW‑EURODRIVE DFS series. It is designed for precision motion control in industrial automation, machine tools, packaging, robotics, and handling systems. It features high torque density, low cogging, and excellent dynamic response.

Description

1. General Information

1.1 Product Overview

The DFS56H/TF/RH1M/KK is a compact, high‑performance synchronous servo motor from the SEW‑EURODRIVE DFS series. It is designed for precision motion control in industrial automation, machine tools, packaging, robotics, and handling systems. It features high torque density, low cogging, and excellent dynamic response.

1.2 Model Code Definition

  • DFS56H: Synchronous servo motor, frame size 56, flange‑mounted, terminal box version, H = standard shaft.

  • TF: Thermistor (PTC) winding temperature protection.

  • RH1M: Resolver (1‑speed, medium‑resolution) feedback, M16×1.5 connector.

  • KK: Connector kit / standard electrical interface (power + signal).

1.3 Safety Instructions

  • Installation, commissioning, and maintenance must be performed by qualified electrical/mechanical personnel.

  • Disconnect all power before mounting, wiring, or servicing.

  • The motor contains permanent magnets; keep away from magnetic media and sensitive equipment.

  • Do not exceed rated voltage, current, or torque.

  • Protect from heavy impact, corrosive atmospheres, and excessive dust.

  • IP65 protection (standard) for dust and splash resistance.

2. Technical Specifications

2.1 Electrical & Mechanical Data

  • Type: 3‑phase synchronous servo motor (permanent magnet)

  • Frame size: 56

  • Rated power: ~0.4–0.75 kW (depending on winding)

  • Rated torque: ~1.9–2.4 Nm

  • Rated speed: 3000 rpm

  • Max speed: 6000 rpm

  • Voltage: 400 VAC (3‑phase)

  • Feedback: Resolver RH1M

  • Thermal protection: TF (PTC thermistor)

  • Protection class: IP65

  • Shaft: Ø14 mm, keyed

  • Flange: B5 (IEC 56)

  • Weight: ~4.5 kg

  • Ambient temperature: ‑10 °C to +40 °C

  • Storage temperature: ‑25 °C to +40 °C

3. Installation

3.1 Mechanical Mounting

  • Mount on a flat, rigid surface; use all flange bolts (M5) and tighten securely.

  • Ensure no radial/axial overload on the shaft; use flexible couplings.

  • Allow 100 mm clearance around the motor for cooling and cable bending.

3.2 Electrical Connection

  • Use shielded cables for power and feedback (EMC compliance).

  • TF thermistor: Connect to drive thermal monitoring (PTC, ~1 kΩ at 25 °C).

  • RH1M resolver: Connect to resolver interface (e.g., MOVIDRIVE® MDX61B).

  • Ground the motor housing properly.

4. Operation

4.1 Commissioning

  • Perform no‑load run for 5–10 minutes; check for unusual noise, vibration, or temperature rise.

  • Verify resolver feedback and thermal protection wiring.

  • Apply load gradually; monitor current and temperature.

4.2 Operating Guidelines

  • Operate within rated speed/torque; avoid continuous stall.

  • Max winding temperature: +155 °C (PTC trip).

  • Avoid frequent heavy start‑stops.

5. Maintenance

  • Lifetime grease lubrication (bearings); no regular oiling required.

  • Every 6 months:

    • Check mounting bolts and cable connections.

    • Clean cooling surfaces (dry air only; no high‑pressure water).

    • Inspect shaft seal for leaks.

  • Resolver is maintenance‑free.

6. Troubleshooting

  • No rotation: Power loss, wiring error, or drive inhibit.

  • Overtemp (TF): Overload, blocked ventilation, or PTC short.

  • Position error: Resolver wiring fault, loose coupling, or mechanical jam.

  • Vibration/noise: Misalignment, loose bolts, or bearing wear.

7. Top Offer

TOP OFFER – DFS56H/TF/RH1M/KK
Original SEW‑EURODRIVE synchronous servo motor, frame 56, IP65, resolver RH1M, thermistor TF, standard KK connectors. Brand new with 12‑month factory warranty, in stock for immediate delivery.

8. Disclaimer

Specifications are subject to change without notice. The manufacturer is not liable for damage caused by improper installation, overload, or unauthorized modification.


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