NORDAC SK 530E with PosiCon funktion
2 Encoder connection
BU 0510 EN
Subject to technical changes
7
2 Encoder
connection
2.1 Incremental encoder connection
The incremental encoder connection is an input for a type with two tracks and with TTL-compatible signals for
drivers as per EIA RS 422. The maximum current consumption of the incremental encoder must not exceed
150mA. The voltage supply for the incremental encoder is 10-30 V.
The pulse number per revolution can be between 500 and 8192 pulses.
It is set via the parameter P310 "Incremental encoder pulse number" in the menu group "Control parameters". With
cable lengths > 20 m and motor speeds over 1500 min
-1
, the encoder should not have more than 2048
pulses/revolution.
If the cable is longer, the cable cross-section must be selected large enough to ensure that the voltage drop across
the cables is not too high. The supply cable in particular is affected by this, the cross-section can be increased by
parallel switching of several wires.
2.1.1 Colour and contact assignments for the incremental encoder
Operating principle
Cable colours for incremental
encoder
Assignment for SK 530E
10-30V supply
brown / green
X5.
42
VO +15V
0V supply
white / green
X6.
40
DGND
Track A
brown
X6.
51
ENC A+
Track A inverse
green
X6.
52
ENC A-
Track B
Gray
X6.
53
ENC B+
Track B inverse
pink
X6.
54
ENC B-
Track 0
red
--
Track 0 inverse
black
--
Cable shield
Ground extensively via the strain relief or shield angle (can be ordered as
fastening kit option)
NOTE :
If there are deviations from the standard equipment (10-30V encoder, TTL/RS422) for the
motors, please note the accompanying data sheet or consult your suppler.
An external 24V or internal 15V voltage from the frequency inverter can be used as the
voltage supply.
ATTENTION
The rotation of the incremental encoder must correspond to that of the motor. Therefore,
depending on the rotation direction of the encoder to the motor (possibly reversed), a
positive or negative pulse number must be set in parameter P301 "Incremental encoder
pulse number".
