Contactless Data and Power Transmission for 360° Real-Time Applications

Industry 4.0 and the associated networking of machines and equipment are resulting in enormous data volumes. A rapidly lengthening list of processes, spanning everything from production across storage to logistics and shipping, is being automated. Maximum efficiency and uptime are expected of the systems involved. Real-time control is a vital requirement for reliable transmission of data and power. And rapidly rotating components of plants and machines pose especially great challenges.

SPINNER contactless rotary joints

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Wear- and Maintenance-Free Operation

SPINNER offers customers state-of-the-art solutions for maintenance-free, contactless rotary data and power transmission via rotary optical and electronic couplings. Unlike slip rings, rotary couplings from SPINNER are failsafe and have a very long service life. They run in either direction as required, are robust and practically invulnerable to problems and malfunctions, and suffer no wear. SPINNER doesn’t use sliding contacts for transmitting data from the stator to the rotor. Cat. 6 Ethernet cables and RJ 45 connectors are used for the data connections. Modules can be daisy-chained without any problems, and cables up to 100 meters long can be connected to the input and output. The hollow shafts used have a clear diameter of between 20 and a maximum of 300 millimeters, ensuring plenty of room for implementing virtually any application.

Reliable Data Transmission in Real Time

The electronic rotary couplings transmit data at 100 MBit/s, permitting real-time applications at ultra-fast speeds up to 5,000 rpm.

SPINNER Contactless Data Transmission

Supported Ethernet Protocols

The rotary couplings support all IEEE802.3-based bus protocols, including Profinet IRT, Sercos III, Ethercat and Powerlink. The bit error rate (BER) is less than 1x10-12, even at 99% bus capacity utilization. For applications calling for even higher data rates, 1 Gbit/s transmission models with automatic bus speed detection (autonegotiation) are used; these can also be freely combined with contactless couplings for other bus protocols such as Profibus, CAN or RS422.




SPINNER sercos logo


CAN, CANopen


IEEE-1588 v2 (PTP)



Sercos III






Contactless Data and Power Transmission Replace Slip Rings in Rotating Applications

Contactless data delivers clear benefits in rotating systems whenever slip rings can’t meet requirements due to large diameters, high data volumes and/or infrequent maintenance.

This is also true of contactless power transfer systems with hollow cores: they’re preferable whenever failsafe, uninterrupted (24/7) operation is essential at high rotational speeds.

Combined data and power transmitters up to 750 W

The new compact transmission systems from SPINNER ingeniously combine contactless data transfer, which has proved itself in real-time bus systems, with the ability to supply up to 750 watts. As an added benefit, there is room in the hollow cores for device-specific connections to the rotating unit.

SPINNER - Drehender Leistungsübertrager 750 WSPINNER Combined Power and Data Transmitter 750 W
SPINNER - Drehender Leistungsübertrager bis 300WSPINNER Combined Power and Data Transmitter 300 W

Transmittable protocols / BUS systems (100 Mbit/s)

  • EtherCat (Beckhoff)
  • Profinet Class A,B, and C (real-time IRT) (Siemens and Phoenix Contact)
  • Powerlink (B&R)
  • Bluecom (Bachmann)
  • Sercos III (Bosch)
  • DriveCliq (Siemens)
  • and others

Overview of power transmission specifications

  • Input/output voltages: 24 V or 48 V
  • Max. transmittable power: 24 V/300 W, 48 V/750 W
  • Regulated output voltage with low ripple
  • Free inside diameter of 300W version: 20 mm; 750 W version: 50 mm
  • Maximum rotational speed: 300 rpm (special versions up to 3,000 rpm)
  • Operation independent of speed and direction of rotation
  • High efficiency

Please contact us for further information!

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Contactless power and Ethernet modules are ideal for industrial applications, such as bottling plants, fairground rides, machines for producing hygienic products, and cable drums for port cranes. Versions with optical rotary couplings perform outstandingly well in wire rope production machines, construction machinery, packaging systems, industrial robots and very often in radar systems with rotating antennas. For optimizing data transmission in wind turbines, SPINNER supplies innovative solutions with both contactless and optical rotary couplings.

Additional Rotary Joint Types

RF Rotary Joints

Hybrid Rotary Joints

Fiber Optic Rotary Joints

Catalogs and Brochures (PDF Download)

  • ATC Catalog EN

    Rotary Joints for Air Traffic Control (5 MB, 60 pages)

  • Wind EN

    Data Transmission in Wind Turbines (2 MB, 12 pages)


    Fiber Optic Rotary Joints (5 MB, 20 pages)

  • Ethernet EN

    Contactless Data & Power Transmission (3 MB, 8 pages)

  • Combined Contactless Data and Power

    Combined Contactless Data & Power Modules (2 MB, 4 Seiten)


    Rotary Joints for SPACE Applications (2 MB, 12 pages)

  • Ultra HD Televison EN

    Rotating Solutions for Camera Applications (2 MB, 4 pages)

  • Rotating Solutions EN

    Rotating Solutions 2008-2017 (9.7 MB, 116 pages)

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