Simple connection technology

Encoders with the purely serial EnDat interface predominantly use 8-pin M12 and 9-pin M23 connecting elements.

This widespread connector technology offers the following benefits:

  • Cost-effective connection technology
  • Smaller connector dimensions and thinner connecting cables

Through its lower number of wires, EnDat 3 offers further options for miniaturizing the connection technology and adapting it to the application requirements.

High transmission frequencies over long cable lengths place rigorous technological demands on the cable. Specifically designed for this purpose, HEIDENHAIN cables are qualified to handle this type of application. We therefore recommend using HEIDENHAIN cables.

4-wire technology
In the 4-wire variant, the master powers the encoder with one wire pair and uses a second wire pair to communicate with the encoder.

2-wire technology (HMC 2)
Unlike the 4-wire option, the 2-wire variant requires additional hardware. In this configuration, the subsequent electronics both power the encoder and communicate with it along a single wire pair. For this purpose, the encoder power supply and data stream are separated by frequency dividing networks (one on the master and one on the slave).

4-wire bus in daisy-chain mode
This variant 
allows encoders to be operated on a daisy-chain bus. Unlike the 4-wire variant, the 4-wire daisy-chain bus variant requires an additional transceiver branch inside the encoder. This additional transceiver branch establishes the data connection to the next encoder on the bus. The 4-wire daisy-chain bus variant also supports the 4-wire variant.

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.

Sensor box
With the 4-wire variant, a sensor box can be looped in.

Power supply
The supply voltage and power consumption are stated in each encoder’s specifications. For encoders with the EnDat 3 interface, a supply voltage of 12 V (±5 %) is recommended.