2 Assembly and installation
BU 0200 GB Subject to technical alterations 47
2.8.3 Colour and contact assignments for incremental encoders (HTL)
Function
Wire colours,
for incremental encoder
Assignment for SK 2x5E
24V supply brown / green
44 24V (VO)
0V supply white / green
40 0V (GND)
Track A brown
22 DIN2
Track A inverse (A /) green --
Track B grey
23 DIN3
Track B inverse (B /) pink --
Track 0 red --
Track 0 inverse black --
The cable shield should be connected to a wide area of the frequency inverter housing
Only the digital inputs DIN2 and DIN 3 of the frequency inverter are able to process the signals from an HTL
encoder.
ATTENTION
When using DIN2 and DIN3 as rotary encoder evaluation, it is essential to set the functions of
the digital inputs DIN2 and DIN3 (Parameter (P420 [-02, -03])) to “No Function”. (For using the
DIP-switches of the frequency inverter for parametrisation, please lock at section 5.1.2 .)
NOTE: The data sheet accompanying the encoder should be observed.
RECOMMENDATION: For good reliability, especially with long connecting cables, an incremental encoder
for 10-30V supply voltage should be used. Either an external or the internal 24V
voltage can be used for the supply. 5V encoders should not be used! With the use
of a type SK-xU4-24V... mains unit, the power restriction of the mains unit should be
noted (Encoder current consumption: up to 150mA).
NOTE
The direction of rotation of the incremental encoder must correspond to that of the motor.
Therefore, according to the direction of rotation of the encoder relative to the motor (this may
be inverted) a positive or negative pulse number must be set in parameter (P301).
ATTENTION
It is essential to insulate unused wires (e.g. Track A inverse / B inverse).
Otherwise, contact between these wires or to the cable shielding may cause short circuits,
which may interfere with the encoder signal or destroy the encoder.
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