HEIDENHAIN Length Gauges - Manual (Page 38)

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Interface electronics
Interface electronics from HEIDENHAIN
adapt the encoder signals to the interface
of the subsequent electronics. They are
used when the subsequent electronics
cannot directly process the output signals
from HEIDENHAIN encoders, or if
additional interpolation of the signals is
necessary.
Box design
Plug design
Version for integration
Top-hat rail design
Input signals of the interface electronics
Interface electronics from HEIDENHAIN
can be connected to encoders with
sinusoidal signals of 1 V
PP
(voltage signals)
or 11 µA
PP
(current signals). Encoders with
the serial interfaces EnDat or SSI can also
be connected to various interface
electronics.
Output signals of the interface
electronics
Interface electronics with the following
interfaces to the subsequent electronics
are available:
• TTL square-wave pulse trains
• EnDat 2.2
• DRIVE-CLiQ
• Fanuc Serial Interface
• Mitsubishi high speed interface
• Yaskawa Serial Interface
• Profi bus
Interpolation of the sinusoidal input
signals
In addition to being converted, the
sinusoidal encoder signals are also
interpolated in the interface electronics.
This permits fi ner measuring steps and, as
a result, higher control quality and better
positioning behavior.
Formation of a position value
Some interface electronics have an
integrated counting function. Starting from
the last reference point set, an absolute
position value is formed when the
reference mark is traversed, and is
transferred to the subsequent electronics.