Nord Drivesystems NORDAC LINK SK250E-FDS User manual

BU 0250 –en
NORDAC LINK (SK 250E-FDS ... SK 280E-FDS)
Users Manual for Frequency Inverters as Field Distributors

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
2 BU 0250 en-3021
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Documentation
Title:
BU 0250
Order no.:
6072502
Series:
SK 2xxE-FDS
Device series:
SK 250E-FDS, SK 260E-FDS,
SK 270E-FDS, SK 280E-FDS
Device types:
SK 2x0E-FDS-370-340-A … SK 2x0E-FDS-751-340-A
0.37 – 7.5 kW, 3~ 380-500 V
Version list
Title,
Date
Order number Device
software
version
Remarks
BU 0250,
July 2016
6072502 / 2916
V 1.0 R0
First edition for pilot series inverters (field test)
BU 0250,
July 2017
6072502 / 2817
V 1.1 R2
• Names of option slots for control elements changed
to H1, H2 and H3
• Technical data modified / supplemented
• Power connection plug and M12 plug connector
Correction of various pin connections
• Parameters P420 / P434 / P480 / P481, functions
37, 42 supplemented
• Parameters P745 / P746 supplemented
• AS-i – Correction of various technical data
• Braking resistors, technical data modified
• CE Declaration of Conformity supplemented
• Various other corrections
BU 0250,
April 2018
6072502 / 1618
V 1.1 R3
Including
• General corrections
• Adaptation of safety information
• Revision of warnings and hazard notes
• Inclusion of UL data
• AS-Interface – “AXS” single slave supplemented
• Supplementation and adaptation of electrical data
• Connection accessories added
• Adaptation of parameters: P107, 206, 208, 330,
331, 332, 333, 434, 481, 546, 558
• Update of EU Declaration of Conformity

Copyright notice
BU 0250 en-3021 3
Title,
Date
Order number Device
software
version
Remarks
BU 0250,
September
2019
6072502 / 3919
V 1.3 R0
Including
• General corrections
• Extension of the series with size 0 (0.37 kW and
above)
• “Plug-in EEPROM” option available
• Adaptation of parameters: P245, 301, 420, 480,
434, 481, 504, 539, 558, 746
• New parameters: P336, 565, 780
• Update of EU Declaration of Conformity
• Accessories (cables) added
BU 0250,
September
2020
6072502 / 3920
V 1.3 R0
Including
• General corrections
• “-ASS” features supplemented as option AS-
Interface variant
• Adaptation of UL plug connectors
• Overview on the connection of an electromechanical
brake extended
BU 0250,
July 2021
6072502 / 3021
V 1.3 R0
• Update “Standards and approvals”
• Update of EU Declaration of Conformity
• Addition of the energy efficiency levels according to
the EU Ecodesign Regulation 1781
Table 1: Version list BU0250
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Copyright notice
As an integral component of the device described here, this document must be provided to all
users in a suitable form.
Any editing or amendment or other utilisation of the document is prohibited.
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Publisher
Getriebebau NORD GmbH & Co. KG
Getriebebau-Nord-Straße 1 • 22941 Bargteheide, Germany • http://www.nord.com/
Fon +49 (0) 45 32 / 289-0 • Fax [phone]
Member of the NORD DRIVESYSTEMS Group
=== Ende der Liste für Textmarke Copyright == =

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
4 BU 0250 en-3021

Table of Contents
BU 0250 en-3021 5
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Table of Contents
=== Ende der Liste für Textmarke Inhaltsverzei chnis ===
1General.........................................................................................................................................................9
1.1 Overview..........................................................................................................................................10
1.2 Delivery............................................................................................................................................11
1.3 Scope of delivery .............................................................................................................................12
1.4 Safety, installation and application information................................................................................14
1.5 Warning and hazard information......................................................................................................18
1.5.1 Warning and hazard information on the product.................................................................18
1.5.2 Warning and hazard information in the document..............................................................19
1.6 Standards and approvals .................................................................................................................19
1.6.1 UL and CSA approval.........................................................................................................20
1.7 Type code / nomenclature................................................................................................................23
1.7.1Type plate...........................................................................................................................23
1.7.2 Field distribution type codes...............................................................................................25
1.8 Power rating / Motor size .................................................................................................................26
1.9 Version with protection class IP55 / IP65.........................................................................................26
2Assembly and installation........................................................................................................................27
2.1 Installation........................................................................................................................................27
2.2 Option slots and equipment versions...............................................................................................29
2.2.1 Option slots.........................................................................................................................29
2.2.1.1 Connection level 29
2.2.1.2 Control level 30
2.2.1.3 Maintenance switch level 30
2.2.2 Configuration variants.........................................................................................................31
2.2.2.1 Configurable options 31
2.2.2.2 Configuration of option slots of the control level 32
2.2.2.3 Configuration of option slots on the connection level 35
2.2.2.4 Configuration of the option slot for the maintenance switch level 39
2.3 Electrical Connection .......................................................................................................................40
2.3.1 Wiring guidelines................................................................................................................41
2.3.2 Electrical connection of power unit .....................................................................................42
2.3.2.1 Mains connection 42
2.3.2.2 Motor cable 43
2.3.2.3 Brake resistor (B+, B-, PE) 44
2.3.2.4 Electromechanical brake 45
2.3.3 Electrical connection of the control unit ..............................................................................46
2.3.3.1 Control connection details 48
2.3.3.2 Basic control unit configuration 50
2.4 Colour and contact assignments for the incremental encoder (HTL) ...............................................51
3Display, operation and options................................................................................................................52
3.1 Displays ...........................................................................................................................................52
3.2 Control and parametrisation options ................................................................................................56
3.2.1 Control and parameterisation units, use.............................................................................56
3.2.2 Connection of multiple devices to one parametrisation tool................................................57
3.3 Optional modules.............................................................................................................................58
3.3.1 SK CU4-… optional modules..............................................................................................58
3.3.2 Optional plug-in EEPROM..................................................................................................59
4Commissioning .........................................................................................................................................62
4.1 Starting up the device ......................................................................................................................62
4.2 Factory settings................................................................................................................................63
4.3 Selecting the operating mode for motor control ...............................................................................64
4.3.1 Explanation of the operating modes (P300) .......................................................................64
4.3.2 Overview of control parameter settings ..............................................................................66
4.3.3 Motor control commissioning steps ....................................................................................67
4.4 Temperature sensors.......................................................................................................................67
4.5 AS Interface (AS-i)...........................................................................................................................68
4.5.1 The bus system..................................................................................................................68
4.5.2 Features and technical data ...............................................................................................70

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
6 BU 0250 en-3021
4.5.3 Bus structure and topology.................................................................................................71
4.5.4 Commissioning...................................................................................................................73
4.5.4.1 Connection 73
4.5.4.2 Displays 73
4.5.4.3 Configuration 74
4.5.4.4 Addressing 75
4.5.5 Certificate ...........................................................................................................................76
5Parameter...................................................................................................................................................77
5.1 Parameter overview.........................................................................................................................80
5.2 Description of parameters................................................................................................................83
5.2.1Operating displays..............................................................................................................84
5.2.2 Basic parameters................................................................................................................86
5.2.3 Motor data / Characteristic curve parameters.....................................................................93
5.2.4 Speed control ...................................................................................................................101
5.2.5 Control terminals ..............................................................................................................110
5.2.6 Additional parameters.......................................................................................................131
5.2.7 Positioning........................................................................................................................151
5.2.8 Information........................................................................................................................151
6Operating status messages ...................................................................................................................164
6.1 Display of messages......................................................................................................................165
6.2 Diagnostic LEDs on device ............................................................................................................165
6.3 Messages.......................................................................................................................................166
6.4 FAQ operational problems .............................................................................................................174
7Technical data .........................................................................................................................................176
7.1 General data for frequency inverter ...............................................................................................176
7.2 Technical data for determining the energy efficiency level.............................................................177
7.3 Electrical data ................................................................................................................................178
7.3.1 Electrical data 3~400 V.....................................................................................................178
8Additional information............................................................................................................................180
8.1 Setpoint processing........................................................................................................................180
8.2 Process controller ..........................................................................................................................181
8.2.1 Process controller application example ............................................................................182
8.2.2 Process controller parameter settings ..............................................................................183
8.3 Electromagnetic compatibility (EMC) .............................................................................................184
8.3.1 General Provisions ...........................................................................................................184
8.3.2 EMC evaluation................................................................................................................185
8.3.3 EMC of device..................................................................................................................186
8.3.4 EU Declaration of Conformity...........................................................................................188
8.4 Reduced output power...................................................................................................................189
8.4.1 Increased heat dissipation due to pulse frequency...........................................................189
8.4.2 Reduced overcurrent due to time .....................................................................................190
8.4.3 Reduced overcurrent due to output frequency .................................................................191
8.4.4 Reduced output current due to low voltage ......................................................................192
8.4.5 Reduced output current due to the heat sink temperature................................................192
8.5 Operation on the FI circuit breaker.................................................................................................193
8.6 System bus ....................................................................................................................................193
8.7 Energy Efficiency ...........................................................................................................................195
8.8 Standardisation of setpoint / target values.....................................................................................196
8.9 Definition of setpoint and actual value processing (frequencies) ...................................................197
8.10 Connection accessories.................................................................................................................198
8.10.1 Power connections - mating connectors...........................................................................198
8.10.2 M12 Y distributor ..............................................................................................................199
8.10.3 Motor cable.......................................................................................................................200
8.10.4 Low voltage cable.............................................................................................................200
8.10.5 Daisy chain cable .............................................................................................................200
8.10.6 Encoder cables.................................................................................................................201
9Maintenance and servicing information................................................................................................202
9.1 Maintenance Instructions ...............................................................................................................202
9.2 Service notes .................................................................................................................................203
9.3 Abbreviations .................................................................................................................................204

List of illustrations
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List of illustrations
=== Ende der Liste für Textmarke Abbildungs verzeichnis ===
Figure 1: SimpleBox, handheld, SK CSX-3H......................................................................................................... 56
Figure 2: ParameterBox, handheld, SK PAR-3H................................................................................................... 56
Figure 3: SK CU4 … optional modules as internal control terminals (example) .................................................... 58
Figure 4 Setpoint processing............................................................................................................................... 180
Figure 5: Process controller flow diagram ........................................................................................................... 181
Figure 6: Heat losses due to pulse frequency ..................................................................................................... 189
Figure 7: Reduced output current due to low voltage .......................................................................................... 192
Figure 8: Energy efficiency due to automatic flux optimisation............................................................................ 195

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
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List of tables
=== Ende der Liste für Textmarke Tabellenver zeichnis ===
Table 1: Version list BU0250................................................................................................................................... 3
Table 2: Additional features................................................................................................................................... 11
Table 3: Warning and hazard information on the product...................................................................................... 18
Table 4: Standards and approvals......................................................................................................................... 19
Table 5: FAQ operational problems..................................................................................................................... 175
Table 6: EMC comparison between EN 61800-3 and EN 55011......................................................................... 185
Table 7: Overview according to product standard EN 61800-3 .......................................................................... 187
Table 8: Overcurrent relative to time ................................................................................................................... 190
Table 9: Overcurrent relative to pulse and output frequency............................................................................... 191
Table 10: Processing of setpoints and actual values in the frequency inverter ................................................... 197
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1 General
BU 0250 en-3021 9
1 General
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The SK 250E-FDS series is based on the tried and tested NORD platform. The frequency inverters
are characterised by their compact design and optimum control characteristics, and have uniform
parametrisation.
The frequency inverters have sensorless current vector control with a wide range of settings. In
combination with suitable motor models, which always provide an optimised voltage/frequency ratio,
all three-phase asynchronous motors that are suitable for inverter operation and permanently excited
synchronous motors can be driven. For the drive unit, this means very high starting and overload
torques with constant speed.
The power range is from 0.37 kW to 7.5 kW.
This series of frequency inverters can be adapted to individual requirements by means of modular
assemblies.
This manual is based on the device software as stated in the version list (see P707). If the frequency
inverter uses a different software version, this may cause differences. If necessary, the current manual
can be downloaded from the Internet (http://www.nord.com/).
Additional descriptions exist for optional functions and bus systems (http://www.nord.com/).
Information
Accessories
The accessories that are mentioned in the manual are also subject to changes. Current details of
these are included in separate data sheets, which are listed under www.nord.com under the heading
Documentation → Manuals → Electronic drive technology → Techn. Info / Data sheet. The data
sheets available at the date of publication of this manual are listed by name in the relevant sections
(TI ...).
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A typical feature of this frequency inverter series is their installation close to the motor, e.g. on the wall
or on a machine frame.
All electrical connections (power connections and control connections) are made with plug connectors.
This considerably simplifies the installation of the frequency inverter and opening the FI is not
necessary.
In order to obtain access to all parameters, the internal RS232 interface (access via RJ12 connection)
can be used. Access to the parameters is made e.g. via an optional SimpleBox or ParameterBox.
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The parameter settings modified by the operator are backed up in the integrated, non-volatile memory
of the device.
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The device is configured according to the customer’s individual requirements. The device equipment is
therefore realised ex works. Later retrofittings of options or device conversions are not planned.

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
10 BU 0250 en-3021
Information
The device must not be opened
The device must not be opened at any time during its service life and does not need to be. All mounting,
installation and commissioning works as well as normal operation are only done on the closed device.
• Assembly is done via freely accessible mounting holes.
• Electrical connection is exclusively established via plug connectors.
• Operational settings are made via parameter adjustments. Access for the connection of a parameterisation
tool, for example, is via a blind plug. This blind plug may only be removed for work in connection with
commissioning and must be properly replaced afterwards.
• Diagnostic LEDs for displaying switching and operating states are externally visible.
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1.1 Overview
This manual describes all of the possible functions and equipment. The configuration and functionality
are limited according to the type of device.
Basic characteristics
• High starting torque and precise motor speed control setting by means of sensorless current vector
control
• Wall mounting close to the motor.
• Permissible ambient temperature -25 °C to 40 °C (please refer to the technical data)
• Integrated EMC mains filter for Class A limit values / Category C2
• Automatic measurement of the stator resistance and determination of the precise motor data
• Programmable direct current braking
• Built-in brake chopper for 4-quadrant operation, optional braking resistors (internal/external)
• Separate temperature sensor input (TF+/TF-) a)
• Evaluation of an incremental encoder via digital inputs a)
• NORD system bus for connecting additional modular assemblies a)
• Four separate online switchable parameter sets
• Diagnostic LEDs (incl. signal status DIs/ DOs)
• RS232/RS485 interface via RJ12 port, alternatively via USB
• 24 V DC control voltage
– Must be provided via a plug connector, or
– Can be provided by the FI (only with option –HVS).
It is also possible to connect an external 24 V DC voltage supply via an optional plug connector
in order to supply a high power peripheral (e.g. actuator).
• Integrated "POSICON" positioning control (BU 0210)
• CANopen absolute value encoder evaluation via the NORD system bus a)
• Operation of three-phase current asynchronous motors (ASM) and Permanent Magnet
Synchronous Motors (PMSM)
• Integrated PLC (BU 0550)
a)
Connection is only possible with optional plug connectors.

1 General
BU 0250 en-3021 11
The differences between the individual versions (SK 250E / SK 260E / SK 270E / SK 280E) are
summarised in the following table and will be described later in this manual.
Additional features
Feature 250E 260E 270E 280E
Number of digital inputs (DIN) 1) 2)
5+2
5+2
5+2
5+2
Number of digital outputs (DO)
2
2
2
2
Number of analogue inputs (AIN)1)
2
2
2
2
Safe pulse block (STO / SS1) (

BU0235)
x
x
AS Interface3)
x
x
1)
Alternatively, the analogue inputs can also be used as digital inputs (not PLC-compatible).
2)
If necessary, individual inputs can be defined at the factory by use of certain optional modules.
3)
Double slave, supports the CTT2 protocol (5I / 6O) from the point of view of the device, 2nd slave:
Parameter data and process data communication (BU 0255)
Table 2: Additional features
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Optional features
The FI can be individually adapted to the drive task. For this, a comprehensive selection of interfaces,
plug connections and control elements are available, which can be used during the manufacture of the
FI according to the customer's requirements.
Depending on the configuration, the meaning of the individual LEDs, function or assignment of
individual plug connectors or the function of control elements (e.g. switches) may differ. The possible
combinations will be illustrated and explained in the course of this manual. The individual configuration
of the FI can be identified using the type plate and can be compared with the details in the manual.
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1.2 Delivery
Examine the frequency inverter for transport damage or loose components immediately on delivery /
unpacking.
In case of damage, contact the carrier immediately and arrange for a careful survey.
Important! This also applies if the packaging is undamaged.
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NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
12 BU 0250 en-3021
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1.3 Scope of delivery
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NOTICE
Defect in the device
Use of unapproved accessories and options (e.g. options from other device series (SK CSX 0)) may
result in defects of the interconnected components.
• Only use accessories and options which are explicitly intended for use with this device and stated
in this manual.
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Standard version: • IP65 version (with attached fan: IP55)
• Operating instructions as PDF file on CD ROM including NORD CON, (PC
parametrisation software)
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Configurable options and accessories:
Designation Example Description
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Control and parametrisation options
Parameterisation units for
temporary connection to the
device, handheld
For commissioning, parametrisation and control
of the device
Type SK PAR-3H, SK CSX-3H
(Section 3.2)
NORDAC ACCESS BT
NORDAC
ACCESS BT
in combination with the
NORDCON APP is used for the mobile
parameterisation of the device.
BU 0960
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Interfaces
IO Extensions
Interfaces for extending the analogue and digital
inputs and outputs.
Type SK CU4-IOE…
(Section 3.3.1)
Bus interfaces
Interfaces for integration into a field bus system
(CANopen, DeviceNet, EtherCAT, Ethernet/IP,
Powerlink, Profibus DP, Profinet IO, Profisafe)
Type SK CU4- …
(Section 3.3.1)
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1 General
BU 0250 en-3021 13
Brake resistors
Internal braking resistors
Brake resistor for dissipating generated energy
from the drive system by conversion into heat.
Energy is generated by the braking processes, or
by downward movement of loads,
(Section 2.3.2.3)
External braking resistors
Refer to:
Internal braking resistors,
however for wall mounting
SK BRW5-…
(Section 2.3.2.3)
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Software (Free download)
NORDCON
Software
MS Windows ®-based
For commissioning, parametrisation and control
of the device.
See www.nord.com
NORDCON
NORDCON APP
NORDAC ACCESS BT in combination with the
NORDCON APP is used for the mobile
parameterisation of the device.
BU 0960
ePlan macros
Macros for producing electrical circuit diagrams
In preparation
Device master data
Device master data/device description files for
NORD field bus options
NORD field bus files
S7 standard modules for
PROFIBUS DP and
PROFINET IO
Standard modules for NORD frequency inverter
See www.nord.com
S7_Files_NORD
Standard modules for the TIA
portal for PROFIBUS DP and
PROFINET IO
Standard modules for NORD frequency inverter
Available on request
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NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
14 BU 0250 en-3021
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1.4 Safety, installation and application information
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Before working on or with the device, please read the following safety instructions extremely carefully.
Please pay attention to all other information from the device manual.
Non-compliance can result in serious or fatal injuries and damage to the device or its surroundings.
These safety instructions must be kept in a safe place!
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1. General
Do not use defective devices or devices with defective or damaged housings or missing covers (e.g.
blind plugs for cable glands). Otherwise there is a risk of serious or fatal injuries caused by electric
shock or bursting electrical components such as powerful electrolytic capacitors.
Unauthorised removal of covers, improper use, incorrect installation or operation causes a risk of
serious personal injury or material damage.
During operation, depending on their protection class, devices may have live bare components as well
as hot surfaces.
The device operates with a dangerous voltage. Dangerous voltage may be present at the supply lines,
contact strips and PCBs of all connecting terminals (e.g. mains input, motor connection), even if the
device is not working or the motor is not rotating (e.g. caused by electronic disabling, jamming of the
drive or a short circuit at the output terminals).
The device is not equipped with a mains switch and is therefore always live when connected to the
power supply. Voltages may therefore be connected to a connected motor at standstill. An optional
mains connection outlet is also live.
Even if the drive unit has been disconnected from the mains, a connected motor may rotate and
possibly generate a dangerous voltage.
If you come into contact with dangerous voltage such as this, there is a risk of an electric shock, which
can lead to serious or fatal injuries.
Power plug connectors must not be pulled out while they are connected to the power supply. Failure to
comply with this may cause arcing, which in addition to the risk of injury, also results in a risk of
damage or destruction of the device.
The fact that the status LED or other indicators are not illuminated does not indicate that the device
has been disconnected from the mains and is without voltage.
The heat sink and all other metal components as well as the surfaces of power plug connectors may
heat up to temperatures in excess of 70°C.
Touching these parts can result in local burns to the body parts concerned (cooling times and
clearance from neighbouring components must be complied with).
All work on the device, e.g. transportation, installation, commissioning and maintenance work must be
carried out by qualified personnel (observe IEC 364 or CENELEC HD 384 or DIN VDE 0100 and
IEC 664 or DIN VDE 0110 and national accident prevention regulations). In particular, the general and
regional installation and safety regulations for work on high voltage systems (e.g. VDE) must be
complied with, as must the regulations concerning correct use of tools and the use of personal
protection equipment.
During all work on the device, take care that no foreign bodies, loose parts, moisture or dust enter or
remain in the device (risk of short circuit, fire and corrosion).
Further information can be found in this documentation.
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1 General
BU 0250 en-3021 15
2. Qualified experts
For the purposes of these basic safety instructions, qualified personnel are persons who are familiar
with the assembly, installation, commissioning and operation of this product and who have the
relevant qualifications for their work.
Furthermore, the device and the associated accessories may only be installed and started up by
qualified electricians. An electrician is a person who, because of their technical training and
experience, has sufficient knowledge with regard to
• switching on, switching off, isolating, earthing and marking power circuits and devices,
• proper maintenance and use of protective devices in accordance with defined safety standards.
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3. Correct purpose of use – general
The frequency inverters are devices for industrial and commercial systems used for the operation of
three-phase asynchronous motors with squirrel-cage rotors and Permanent Magnet Synchronous
Motors – PMSM. These motors must be suitable for operation with frequency inverters, other loads
must not be connected to the devices.
The devices are components intended for installation in electrical systems or machines.
Technical data and information for connection conditions can be found on the rating plate and in the
documentation, and must be complied with.
The devices may only be used for safety functions which are described and explicitly approved.
CE-labelled devices fulfil the requirements of the Low Voltage Directive 2014/35/EU. The stated
harmonized standards for the devices are used in the declaration of conformity.
a. Supplement: Correct purpose of use within the European Union
When installed in machines, the devices must not be commissioned (i.e. commencement of
proper use) until it has been ensured that the machine fulfils the provisions of EC Directive
2006/42/EC (Machinery Directive); EN 60204-1 must also be complied with.
Commissioning (i.e. start-up of proper use) is only permitted if the EMC directive (2014/30/EU)
has been complied with.
b. Supplement: Correct purpose of use outside the European Union
The local conditions of the operator for the installation and commissioning of the device must be
complied with at the usage location (see also "a) Supplement: Correct purpose of use within the
European Union").
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4. Phases of life
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Transport, storage
The information in the manual regarding transport, storage and correct handling must be complied
with.
The permissible mechanical and climatic ambient conditions (see technical data in the manual for the
device) must be complied with.
If necessary, suitable, adequately dimensioned means of transport (e.g. lifting gear, rope guides) must
be used.
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Installation and assembly
The installation and cooling of the device must be implemented according to the regulations in the
corresponding documentation. The permissible mechanical and climatic ambient conditions (see
technical data in the manual for the device) must be complied with.
The device must be protected against impermissible loads. In particular, components must not be
deformed and/or insulation distances must not be changed. Touching of electronic components and
contacts must be avoided.

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
16 BU 0250 en-3021
The device and its optional modules contain electrostatically sensitive components, which can be
easily damaged by incorrect handling. Electrical components must not be mechanically damaged or
destroyed.
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Electrical connection
Ensure that the device and the motor are specified for the correct supply voltage.
Installation, maintenance and repair work must not be carried out unless the device has been
disconnected from the voltage and at least 5 minutes have elapsed since the mains was switched off!
(Due to charged capacitors, the equipment may continue to carry hazardous voltages for up to 5
minutes after being switched off at the mains). Before starting work it is essential to check by
measurement that all contacts of the power plug connections or the connection are voltage-free.
The electrical installation must be implemented according to the applicable regulations (e.g. cable
cross-section, fuses, earth lead connections). Further instructions can be found in the documentation
or manual for the device.
Information regarding EMC-compliant installation such as shielding, earthing, location of filters and
routing of cables can be found in the documentation for the devices and in the technical information
manual TI 80-0011. This information must always be observed even with inverters with a CE label.
Compliance with the limit values specified in the EMC regulations is the responsibility of the
manufacturer of the system or machine.
In case of a fault, inadequate earthing may result in electric shock, possibly with fatal consequences.
The device may only be operated with effective earth connections which comply with local regulations
for large leakage currents (> 3.5 mA). Detailed information regarding connections and operating
conditions can be obtained from the technical Information manual TI 80-0019.
Connection of the supply voltage may directly or indirectly set the inverter into operation. Contact with
electrically live components will result in electric shock, possibly with fatal consequences.
All poles of cable connections (e.g. power supply) must always be disconnected.
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Set-up, troubleshooting and commissioning
When working on live devices, the applicable national accident prevention regulations must be
complied with (e.g. BGV A3, formerly VBG 4).
The voltage supply of the device may directly or indirectly put it into operation, or touching electrically
conducting components may then cause an electric shock with possible fatal consequences.
The parametrisation and configuration of the devices must be selected so that no hazards can occur.
With certain setting conditions, the device or the motor which is connected to it may start automatically
when the mains are switched on. The machinery which it drives (press / chain hoist / roller / fan etc.)
may then make an unexpected movement. This may cause various injuries, including to third parties.
Before switching on the mains, secure the danger area by warning and removing all persons from the
danger area.
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Operation
Where necessary, systems in which the devices are installed must be equipped with additional
monitoring and protective equipment according to the applicable safety requirements (e.g. legislation
concerning technical equipment, accident prevention regulations, etc.).
All covers must be kept closed during operation.
With certain setting conditions, the device or the motor which is connected to it may start automatically
when the mains are switched on. The machinery which it drives (press / chain hoist / roller / fan etc.)
may then make an unexpected movement. This may cause various injuries, including to third parties.
Before switching on the mains, secure the danger area by warning and removing all persons from the
danger area.

1 General
BU 0250 en-3021 17
Due to its operation, the device produces noises within the audible frequency range. These noises
may cause long-term stress, discomfort and fatigue, with negative effects on concentration. The
frequency range or the noise can be shifted to a less disturbing or almost inaudible range by
adjustment of the pulse frequency. However, this may possibly result in derating (lower power) of the
device.
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Maintenance, repair and decommissioning
Installation, maintenance and repair work must not be carried out unless the device has been
disconnected from the voltage and at least 5 minutes have elapsed since the mains was switched off!
(Due to charged capacitors, the equipment may continue to carry hazardous voltages for up to
5 minutes after being switched off at the mains). Before starting work it is essential to check by
measurement that all contacts of the power plug connections or the connection are voltage-free.
For further information, please refer to the manual for the device.
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Disposal
The product and its parts and accessories must not be disposed of as domestic waste. At the end of
its life, the product must be properly disposed of according to the local regulations for industrial waste.
In particular, this product contains integrated semiconductor circuits (PCBs and various electronic
components, including high power capacitors). In case of incorrect disposal there is a risk of formation
of toxic gases, which may cause contamination of the environment and direct or indirect injuries (e.g.
chemical burns). In the case of high power capacitors, there is also a risk of explosion, with the
associated risk of injury.
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5. Potentially explosive environment (ATEX)
The device is not approved for operation or maintenance work in potentially explosive environments
(ATEX).
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NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
18 BU 0250 en-3021
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1.5 Warning and hazard information
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Under certain circumstances, hazardous situations may occur in association with the frequency
inverter. In order to give explicit warning of possibly hazardous situations, clear warning and hazard
information can be found on the device and in the relevant documentation.
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1.5.1 Warning and hazard information on the product
The following warning and hazard information is used on the product.
Symbol Supplement to
symbol 1) Meaning
DANGER
Device is live
> 5min after
removing mains
voltage
Danger
Electric shock
The device contains powerful capacitors. Because of this, there may be a
hazardous voltage for more than 5 minutes after disconnection from the mains.
Before starting work, check that the device is free of voltage at all power
contacts by means of suitable measuring equipment.
It is essential to read the manual in order to prevent hazards!
CAUTION
Hot surfaces
The heat sink and all other metal components as well as the surfaces of plug
connectors may heat up to temperatures in excess of 70°C.
• Danger of injury due to local burns on contact.
• Heat damage to adjacent objects
Allow sufficient cooling time before starting work on the device. Check the
surface temperatures with suitable measuring equipment. Maintain an
adequate distance to adjacent components or provide protection against
contact.
NOTICE
EDS
The device contains electrostatically sensitive components, which can be
easily damaged by incorrect handling.
Avoid all contact (indirect contact by tools or similar, or direct contact) with
PCBs and their components.
1) Texts are written in English.
Table 3: Warning and hazard information on the product
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1 General
BU 0250 en-3021 19
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1.5.2 Warning and hazard information in the document
The warning and hazard information in this document are located at the beginning of the section which
describes the action which may result in the corresponding hazards.
The warning and hazard information is classified as follows according to the risk and the severity of
the resulting injuries.
DANGER! Indicates an immediate danger, which may result in death or serious injury.
WARNING Indicates a possibly dangerous situation, which may result in death or
serious injury.
CAUTION Indicates a possibly dangerous situation, which may result in slight or
minor injuries.
NOTICE Indicates a possibly harmful situation, which may cause damage to the
product or the environment.
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1.6 Standards and approvals
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All devices of the entire SK 200E series comply with the standards and directives listed below.
Approval Directive Applied
standards Certificates Label
CE
(European
Union)
Low Voltage 2014/35/EU EN <v>T -
Norm_CE_1</v>
EN 60529
EN <v>T -
Norm_CE_2</v>
EN 63000
EN 61800-9-1
EN 61800-9-2
<v>T -
Zertifikat_CE</v>
EMC 2014/30/EU
RoHS 2011/65/EU
Delegated directive
(EU) 2015/863
Ecodesign
2009/125/EC
Regulation (EU)
Ecodesign 2019/1781
UL
(USA) UL <v>T -
Norm_CE_1</v>
<v>T -
Zertifikat_ULund
CSA</v> <v>B -
Logo_c(UL)us
</v>
CSA
(Canada) C22.2 No.274-13
<v>T -
Zertifikat_ULund
CSA</v>
RCM
(Australia) F2018L00028 EN <v>T -
Norm_CE_2</v>
<v>T -
Zertifikat_RCM</
v>
EAC
(Eurasia) TR CU 004/2011,
TR CU 020/2011
IEC <v>T -
Norm_CE_1</v>
IEC <v>T -
Norm_CE_2</v>
<v>T -
Zertifikat_EAC</v
>
Table 4: Standards and approvals

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
20 BU 0250 en-3021
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1.6.1 UL and CSA approval
File No. E171342
Categorisation of protective devices approved by the UL according to United States Standards for the
inverters described in this manual is listed below with essentially the original wording. The
categorisation of individually relevant fuses or circuit breakers can be found in this manual under the
heading “Electrical Data”. All devices include motor overload protection.
(section 7.3)
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Information
Group fuse protection
The devices can be protected as a group via one common fuse (see below for details). Pay attention
to compliance with the total currents and the use of correct cables and cable cross-sections. If the
device is mounted close to the motor, this also applies to the motor cables.
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UL / CSA conditions according to the report
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Information
"Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection
must be provided in accordance with manufacturer instructions, the National Electric Code and any additional
local codes.
CSA: For Canada: ”Integral solid state short circuit protection does not provide branch circuit protection. Branch
circuit protection must be provided in accordance with the Canadian Electrical Code, Part I”.”
“Use 75°C Copper Conductors Only. Higher temperature ratings are acceptable."
„For installations according to Canadian National Standard C22.2 No. 274-13: For use in Pollution Degree 2 and
Overvoltage Category III environments only.” or equivalent.”
“The device has to be mounted according to the manufacturer instructions.”
“For NFPA79 applications only”
“The source shall be derived from a non-corner grounded type TN or IT AC source not exceeding 289 V phase to
earth (or equivalent)”