INC4 incremental encoder channels 337
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
One differentiates between single track and dual track encoders. Dual track encoders (quadrature
encoders) emit two signals offset by 90° of phase, the tracks A and B (C and D). By evaluating the phase
information between the A and B-track, the direction of turning can be determined. If the corresponding
encoder type is selected, this functionality is supported.
The actual time or frequency information, however, is derived exclusively from the A(C) -track!
The measurement types Event, Frequency, and Time always are measured by one-track encoders, since
in these cases no evaluation of direction or sign would make any sense. The sensor must simply be
connected to the terminal for Track A (C).
6.12.4 Sensors with current signals
For a rotational encoder working with current signals, the current/ voltage terminal ACC/DSUB-ENC4-IU
can be used. It is possible to power the sensor from the INC4 module. The pertinent specifications are:
max. supply current: 170 mA per DSUB-terminal. Higher supply current should be provided externally.
typ. encoder with 11µAss signals: Heidenhain ROD 456, current c: max. 85 mA per (2-signal) encoder
-> insufficient module supply! Sensor must be supplied externally!
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