nord NORDAC PRO SK 511E Series - Electrical Connection of the Control Unit

SK 54xE – Users Manual for Frequency Inverters
60 BU 0505 EN-3021
Breake resistor (X2 - +B, -B)
The terminals +B/ -B are intended for the connection of a suitable braking resistor. A short screened
connection should be selected. For the installation of a braking resistor, the large amount of heat
which is generated due to its operation (> 70°C) must be taken into account.
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2.9.5 Electrical connection of the control unit
The control connections are located under the front cover (above size 8 under the two front covers) of
the frequency inverter. The configuration differs according to the size. Up to size 7, the individual
control terminals (X3, X8, X13) are in staggered positions (please see chapter 2.9 "Electrical
connection").
Connection data:
Frequency inverter All Size 1 … 4 Size 5 … 7
Above
size 8:
Terminal block
Typically
X3
X3, X8,
X12, X13
X3.1/2,
X15
Rigid cable Ø [mm²] 0.14 … 1.5 0.14 … 2.5 0.2 … 6 0.2 … 2.5
Flexible cable Ø [mm²] 0.14 … 1.5 0.14 … 1.5 0.2 … 4 0.2 … 2.5
AWG standard 26-16 26-14 24-10 24-12
Starting torque [Nm] Clamping 0.5 … 0.6 0.5 … 0.6 Clamping
[lb-in] 4.42 … 5.31 4.42 … 5.31
GND/0V is a common reference potential for analog and digital inputs.
Furthermore, it must be taken into account that with SK 5x5E size 1 ... 4 frequency inverters, terminal
44 is used to feed in the control voltage. However with devices of size 5 and above, this terminal
provides a 24V control voltage.
Information
Total currents
5 V / 15 V (24 V) can be obtained from several terminals if required. This also includes e.g. digital outputs or a
operating module connected via RJ45
With size 1 ... 4, the total output current must not exceed 250 mA / 150 mA (5 V / 15 V). Above Size 5 the limiting
value is 250 mA / 200 mA (5 V/24 V).
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NOTICE
Cable laying
All control cables (including thermistors) must be routed separately from the mains and the motor cables to
prevent interference in the device.
If the cables are routed in parallel, a minimum distance of 20 cm must be maintained from cables which carry a
voltage of > 60 V. The minimum distance may be reduced by screening the cables which carry a voltage, or by
the use of earthed metal partitions within the cable conduits.
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