EnDat 3: ready for the future of digital manufacturing

EnDat 3 consistently expands on and further develops the characteristics of the EnDat family for the digital future of industrial manufacturing.

What’s new with EnDat 3:

  • Hybrid cable transmission
  • Bus topologies
  • Sensors: flexible data contents and sensor box
  • Functional safety: communication in accordance with the black-channel principle
  • Higher data bandwidth
  • Definable send lists
  • System installation: introduction of access levels

For a quick overview

The Technical Information document “EnDat 3: Proven Interface Technology Continuously Further Developed”

Discover EnDat 3 in detail:

Industry- and application-specific benefits

EnDat 3 communication

Functional safety

Simple connection technology

The Implementation Guide provides an overview of which documents and their content are intended for which readers, as well as the available implementation aids.

We can provide the following documents upon request:

  • EnDat 3 Interface Specification
  • EnDat 3 Hardware Specification
  • EnDat 3 Application Conditions for Functional Safety
  • EnDat 3 Master Instructions

To ask more questions about EnDat 3 and request the EnDat 3 document packet, please use our
Contact form

Discover exciting innovations like MULTI-DOF TECHNOLOGY, TRANSFERABLE ACCURACY, and bus operation with EnDat 3 at our digital event for the semiconductor and electronics industry.

Check out the digital event

EnDat 3 offers the following characteristics:


  • Wide range of encoders from various manufacturers
  • Encoders with different measuring and scanning methods
    • Absolute, incremental
    • Photoelectric, inductive, magnetic
    • Singleturn, multiturn with gears, multiturn with buffer battery backup
  • Encoders with mutually compatible mounting solutions
  • Convenient cabling
    • Hybrid cable technology
    • Bus operation
    • Integration of sensor boxes
  • Integration of additional sensors
    • Sensors inside the encoder
    • External sensors

Rotary encoders and connection technology for the market introduction:

ECI/EQI 1100 for small motors
ECI/EQI 1300 for larger motors
ECN/EQN absolute rotary encoders
The HMC 2 hybrid motor cable with an M12 or M23 connector


  • Short cycle times
    • 15 µs can be achieved with very low position-measurement jitter
  • High bandwidth
    • 12.5 Mbit/s at 100 m cable length, or 25 Mbit/s at 40 m


  • Transmission of position values and sensor data
    • Send lists permit predefined communication for various operating scenarios
    • Access to the encoder memory during normal operation
  • Extensive system monitoring for Industry 4.0
    • Automatic system installation and diagnostics
    • Sensor data


  • Electronic ID label for automatic system installation
    • Data for the encoder, motor, and system
  • Online encoder diagnostics
    • Together with further sensor data, forms the basis for condition monitoring and predictive maintenance
  • Storage of operating status data
    • Storage via the subsequent electronics
    • Data acquisition through the encoder


  • For safety-related applications up to SIL 3
    • Black-channel communication
    • Convenient implementation thanks to data separation for motion controller and safety controller

EnDat 3: overview of basic features


ProtocolRequest-response procedure in half-duplex mode
Physical layerRS-485: 4-wire or 2-wire
Data rate12.5 Mbit/s (25 Mbit/s)
Cable lengthFor 12.5 Mbit/s: max. 100 m / for 25 Mbit/s: max. 40 m
HPF send time
(position availability in the master)
Typ. 10 μs
Cycle timeTyp. > 25 μs
Bus operationDaisy chain
Functional safetyDesigned for up to SIL 3, black-channel communication



DiagnosticsFor condition monitoring and predictive maintenance
System informationAutomated configuration and storage of operating status data
Access controlUser authentication (e.g., for datum shift, OEM memory)


Ordering designations

The ordering designation defines key communication characteristics:

Supported communication typesE30-R2E30-R4E30-RB
EnDat 3:
communication modulated onto the supply wires
EnDat 3:
communication + separate power supply wires (4 wires)
EnDat 3: bus operation
Sensor box integration