The electronic interface consists in all the input and output components that allow both the power supply and the transmission of electric pulses of the encoder.

In the incremental system, the transmission of output signals occurs through one or more channels and could be of different kinds:

NPN and NPN open collector
PNP and PNP open collector
Push-Pull
Line driver

In the absolute system, the transmission of output signals could be analogue (voltage/current) or digital parallel, digital serial (SSI or BiSS), or field-bus type (Eltra employs Profibus DP or Profinet communication protocol for its encoders).