Nord Drivesystems SK 180E Series User manual

BU 0180 GB-2313 1
GB
BU 0180
SK 180E…190E
Manual for Frequency inverters

SK 180E Manual for frequency inverters About this document
2 BU 0180 GB-2313
NORD frequency inverters
Safety and operating instructions for
drive power converters
(as per: Low Voltage Directive 2006/95/EEC)
1.General
During operation, drive power converters may, depending on their
protection class, have live, bare, moving or rotating parts or hot sur-
faces.
Unauthorised removal of covers, improper use, incorrect installation
or operation causes a risk of serious personal injury or material
damage.
Further information can be found in this documentation.
All transportation, installation, initialisation and maintenance work
must be carried out by qualified personnel (compliant with IEC
364, CENELEC HD 384, DIN VDE 0100, IEC 664 or DIN VDE 0110,
and national accident prevention regulations).
For the purposes of these basic safety instructions, qualified per-
sonnel are persons who are familiar with the assembly, installation,
commissioning and operation of this product and who have the rele-
vant qualifications for their work.
2. Proper use in Europe
Drive power converters are components intended for installation in
electrical systems or machines.
When installed in machines, the drive power converter cannot be
commissioned (i.e. commencement of the proper use) until it has
been ensured that the machine meets the provisions of the EC Di-
rective 2006/42/EEC (Machine Directive); EN 60204 must also be
complied with.
Commissioning (i.e. implementation of the proper use) is only per-
mitted if the EMC directive (2004/108/EEC) is complied with.
Drive power converters with a CE label meet the requirements of the
Low Voltage Directive 2006/95/EEC. The stated harmonized stand-
ards for drive current inverters are used in the declaration of con-
formity.
Technical data and information for connection conditions can be
found on the rating plate and in the documentation, and must be
complied with.
The drive power converters may only be used for safety functions
which are described and explicitly approved.
3. Transport, storage
Information regarding transport, storage and correct handling must
be complied with.
4. Installation
The installation and cooling of the equipment must be implemented
according to the regulations in the corresponding documentation.
The drive power converters must be protected against im-
permissible loads. Especially during transport and handling,
components must not be deformed and/or insulation dis-
tances must not be changed. Touching of electronic com-
ponents and contacts must be avoided.
Drive power converters have electrostatically sensitive
components, which can be easily damaged by incorrect
handling. Electrical components must not be mechanically
damaged or destroyed (this may cause a health hazard!).
5. Electrical connection
When working on live drive power converters, the applicable
national accident prevention regulations must be complied
with (e.g. BGV A3, formerly VBG 4).
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.
Information regarding EMC-compliant installation –such as
shielding, earthing, location of filters and installation of ca-
bles –can be found in the drive power converter documen-
tation. These instructions must be complied with even with
CE marked drive power converters. Compliance with the
limit values specified in the EMC regulations is the respon-
sibility of the manufacturer of the system or machine.
6. Operation
Where necessary, systems where drive power converters
are installed must be equipped with additional monitoring
and protective equipment according to the applicable safety
requirements, e.g. legislation concerning technical equip-
ment, accident prevention regulations, etc.
The parameterisation and configuration of the drive power
converter must be selected so that no hazards can occur.
All covers must be kept closed during operation.
7. Maintenance and repairs
After the drive power converter is disconnected from the
power supply, live equipment components and power con-
nections should not be touched immediately, because of
possible charged capacitors. Observe the applicable infor-
mation signs located on the drive power converter.
Further information can be found in this documentation.
These safety instructions must be kept in a safe place!

SK 180E Manual for frequency inverters About this document
BU 0180 GB-2313 3
Documentation
Designation: BU 0180 GB
Part No.: 607 1801
Device series: SK 180E, SK 190E
Device types: SK 1x0E-250-112-O ... SK 1x0E-750-112-O, 0.25 - 0.75kW, 1~ 100-120V, Output. 230V
SK 1x0E-250-323-B ... SK 1x0E-111-323-B, 0.25 - 1.1kW, 1/3~ 220-240V
SK 1x0E-250-340-B ... SK 1x0E-221-340-B, 0.25 –2.20kW,3~ 380-480V
Version list
Designation of
previous issues
Software
Version
Comments
BU 0180 DE, June 2013
Part. No.607 1801 / 2313
V 1.0 R0
First version based on BU 0200 DE / 2011
Publisher
Getriebebau NORD GmbH & Co. KG
Rudolf-Diesel-Str. 1 D-22941 Bargteheide http://www.nord.com/
Tel.: [phone] / 289-0 Fax [phone]

SK 180E Manual for frequency inverters About this document
4 BU 0180 GB-2313
Intended use of the frequency inverter
Compliance with the operating instructions is essential for fault-free operation and the
acceptance of any warranty claims. These operating instructions must be read before
working with the device!
These operating instructions contain important information about servicing. They must
therefore be kept close to the device.
Frequency inverters are devices for industrial and commercial plants for operating three-
phase asynchronous motors with squirrel-cage rotors. These motors must be suitable for
operation with frequency inverters, other loads must not be connected to the devices.
Frequency inverters are devices for fixed installation on motors or in systems in the vicinity
of the motors to be operated. All details regarding technical data and permissible
conditions at the installation site must be complied with.
Commissioning (commencement of the intended use) is not permitted until it has been ensured
that the machine complies with the EMC Directive 2004/108/EEC and that the conformity of
the end product meets the Machinery Directive 2006/42/EEC (observe EN 60204).
Getriebebau NORD GmbH & Co. KG, 2013

Table of Contents
BU 0180 GB-2313 5
1 GENERAL.................................................................................................................................8
1.1 Overview...............................................................................................................9
1.2 Delivery.................................................................................................................9
1.3 Scope of supply....................................................................................................9
1.4 Safety and installation information .....................................................................11
1.5 Certifications.......................................................................................................13
1.5.1 European EMC Directive.........................................................................................13
1.5.2 UL and cUL approval (in preparation).....................................................................13
1.5.3 C-Tick labeling........................................................................................................14
1.5.4 RoHS compliance...................................................................................................14
1.6 Nomenclature / type codes.................................................................................15
1.6.1 Type code / Frequency inverter - Basic device .......................................................16
1.6.2 Type codes / Adapter unit - Technology Unit..........................................................16
1.6.3 Type codes / Optional modules...............................................................................16
1.7 Version with protection class IP55 / IP66...........................................................18
2 ASSEMBLY AND INSTALLATION ........................................................................................19
2.1 Installation and assembly...................................................................................19
2.1.1 Mounting the housing box.......................................................................................20
2.1.2 Adapters for Different Motors..................................................................................21
2.1.3 Installation of the frequency inverter .......................................................................22
2.1.4 Option slots of the connection unit..........................................................................23
2.2 Dimensions of the frequency inverter.................................................................24
2.2.1 Power rating / Motor size ........................................................................................24
2.2.2 SK 1x0E mounted on motor....................................................................................24
2.2.3 Wall-mounted frequency inverter ............................................................................25
2.3 Brake resistor (BR) (only size 2) ........................................................................26
2.3.1 Internal brake resistor SK BRI4-…..........................................................................26
2.3.2 External brake resistor SK BRE4-...........................................................................27
2.3.3 External brake resistor dimensions.........................................................................27
2.3.4 Electrical data BR ...................................................................................................28
2.4 Overvoltage filter SK CIF....................................................................................29
2.5 Wiring guidelines................................................................................................30
2.6 Electrical Connection..........................................................................................31
2.7 Electrical connection of power unit.....................................................................32
2.7.1 Mains supply (L1, L2, L3, PE).................................................................................33
2.7.2 Motor cable (U, V, W, PE).......................................................................................33
2.7.3 Brake resistor connection (-B, +B) (only size 2)......................................................34
2.7.4 Mains supply jumpers .............................................................................................34
2.8 Electrical connection of the control unit..............................................................35
2.8.1 Control terminals.....................................................................................................36
2.8.2 Control connection details.......................................................................................37
2.8.3 Control connections, communication ......................................................................39
2.9 Plug connectors..................................................................................................40
2.9.1 Plug connectors for power connections ..................................................................40
2.9.2 Plug connectors for control connection...................................................................42
2.10 ATEX Zone 22 for frequency inverters.............................................................44
2.10.1 Modified frequency inverter for compliance with Category 3D..............................45
2.10.2 Options for ATEX Zone 22 3D ..............................................................................45
2.10.3 Maximum output voltage and torque reduction .....................................................48
2.10.4 Commissioning information...................................................................................49
2.10.5 EC Declaration of Conformity (in preparation) ......................................................50
2.11 Outdoor installation...........................................................................................51
3 OPTIONS ................................................................................................................................52
3.1 Overview of optional modules............................................................................53
3.1.1 Overview of internal customer units SK CU4-….....................................................53

SK 180E Manual for frequency inverters
6 BU 0180 GB-2313
3.1.2 Overview of external technology units SK TU4-…..................................................53
3.2 Mounting of optional module ............................................................................. 55
3.2.1 Installation of internal customer units SK CU4-…...................................................55
3.2.2 Installation of external technology units SK TU4-…................................................55
3.3 Details of internal Customer Units SK CU4-….................................................. 56
3.3.1 Potentiometer adapter, SK CU4-POT.....................................................................56
3.3.2 Electronic brake rectifier, SK CU4-MBR .................................................................57
3.3.3 Setpoint converter, SK CU4-REL............................................................................59
3.3.4 Direction selection switch and potentiometer SK TIE4-SWT and SK TIE4-POT.....61
3.4 Details of external Technology Units SK TU4-….............................................. 62
3.4.1 Connection unit SK TI4-TU-BUS / -MSW ...............................................................62
3.4.2 Maintenance switch, SK TU4-MSW-…...................................................................64
4 DISPLAYS AND CONTROL.................................................................................................. 65
4.1 Diagnostic LEDs on the Frequency Inverter...................................................... 65
4.2 Overview of external control devices................................................................. 66
5 COMMISSIONING.................................................................................................................. 67
5.1 Factory settings ................................................................................................. 67
5.2 Commissioning of frequency inverters .............................................................. 67
5.2.1 Connection..............................................................................................................68
5.2.2 Configuration ..........................................................................................................68
5.2.3 Commissioning examples.......................................................................................70
5.3 KTY84-130 connection...................................................................................... 70
5.4 AS interface (only SK 190E).............................................................................. 72
5.4.1 The bus system ......................................................................................................72
5.4.2 Features .................................................................................................................72
5.4.3 Bus structure and topology.....................................................................................73
5.4.4 Commissioning of the AS Interface.........................................................................74
5.4.5 Technical data for AS interface...............................................................................76
6 PARAMETERISATION .......................................................................................................... 77
6.1 Frequency inverter parameterisation................................................................. 78
6.1.1 Operating displays..................................................................................................81
6.1.2 Basic parameter (frequency inverter)......................................................................82
6.1.3 Motor data / characteristic curve parameters..........................................................89
6.1.4 Control terminals.....................................................................................................94
6.1.5 Extra functions......................................................................................................112
6.1.6 Information (Frequency inverter)...........................................................................129
6.2 Parameterisation of I/O - extension SK xU4-IOE-…....................................... 138
6.2.1 Basic parameter (I/O - extension).........................................................................138
6.2.2 Information (I/O - extension).................................................................................140
7 OPERATING STATUS MESSAGES ................................................................................... 142
7.1 SimpleBox display........................................................................................... 143
7.2 Table of possible error messages ................................................................... 143
7.2.1 Table of possible error messages in the frequency inverter .................................143
7.2.2 Table of possible error messages in the I/O extension module ............................149
7.3 Table of possible warning messages .............................................................. 150
7.4 Table of possible reasons for the operating status "switch-on disabled"........ 152
8 TECHNICAL DATA.............................................................................................................. 153
8.1 General data for frequency inverter series SK 1x0E....................................... 153
8.2 Electrical data for frequency inverter............................................................... 154
8.2.1 Electrical data 1~115V..........................................................................................155
8.2.2 Electrical data 1/3~230V.......................................................................................156
8.2.3 Electrical data 3~400V..........................................................................................157
9 ADDITIONAL INFORMATION............................................................................................. 159

Table of Contents
BU 0180 GB-2313 7
9.1 Setpoint processing in the SK 1x0E.................................................................159
9.2 Process controller.............................................................................................160
9.2.1 Process controller application example.................................................................160
9.2.2 Process controller parameter settings...................................................................161
9.3 Electromagnetic compatibility...........................................................................162
9.4 EMC limit value classes ...................................................................................163
9.5 Reduced output power .....................................................................................164
9.5.1 Increased heat dissipation due to pulse frequency ...............................................164
9.5.2 Reduced overcurrent due to time..........................................................................165
9.5.3 Reduced overcurrent due to output frequency......................................................166
9.5.4 Reduced output current due to mains voltage.......................................................167
9.5.5 Reduced output current due to the heat sink temperature....................................167
9.6 Operation with FI circuit breakers.....................................................................168
9.7 System bus.......................................................................................................168
9.8 Energy Efficiency..............................................................................................170
9.9 Motor data - characteristic curves....................................................................171
9.9.1 50Hz characteristic curve......................................................................................171
9.9.2 87Hz characteristic curve (only 400V devices) .....................................................173
9.9.3 100Hz characteristic curve (only 400V devices) ...................................................174
9.10 Standardisation of setpoint / target values.....................................................175
9.11 Definition of setpoint and actual value processing (frequencies)...................176
9.12 Maintenance and servicing information..........................................................177
9.12.1 Maintenance Instructions....................................................................................177
9.12.2 Repair information...............................................................................................178
9.13 Abbreviations in this manual ..........................................................................179
10 KEYWORD INDEX..............................................................................................................180

SK 180E Manual for frequency inverters
8 Pre-series version BU 0180 GB-2313
1 General
The SK 1x0E series is based on the tried and tested NORD platform. These devices feature a compact
design with optimum control characteristics.
These devices are provided with sensorless vector current control system which in combination with
asynchronous three-phase motor types constantly ensures an optimised voltage-to-frequency ratio. This has
the following significance for the drive: Peak start-up and overload torques at constant speed.
This series of devices can be adapted to individual requirements by means of extension modules.
Due to the numerous setting options, these inverters are capable of controlling all three-phase motors. The
power range is from 0.25kW to 2.2kW. The device is equipped with an integrated mains filter.
This manual is based on the device software V1.2 R0 (see P707) of the SK 200E. If the frequency inverter
used has a different version, this may lead to some differences. If necessary, you can download the current
manual from the Internet (www.nord.com).
For the various versions SK 180E / 190E there are also supplementary descriptions for the integrated AS
interface (BU 0180, Section 5.4)
If a bus system is used for communication, a corresponding description (e.g. BU 0220 for PROFIBUS DP) is
provided, or this can be downloaded from the Internet (www.nord.com).
Typically, this series of devices is installed directly on a three-phase asynchronous motor. Alternatively,
optional accessories are available for mounting the devices near to the motor, e.g. on the wall or on a
machine frame.
In order to gain access to all parameters, the internal RS232 PC interface (RJ12) can be used, or an
optional SimpleBox or ParameterBox may be used. In this case, the parameter settings which are changed
by the operator are saved in the EEPROM which is integrated into the frequency inverter.

1 General
BU 0180 GB-2313 Pre-series version 9
1.1 Overview
Basic features of the SK 180E / SK 190E:
High starting torque and precise motor speed control setting with sensorless current vector control
Can be installed directly on, or near to the motor.
Permissible ambient temperature -25°C to 50°C (please refer to the technical data)
Integrated EMC mains filter for limit curve Category C1 or C2 (not for 115V devices)
Automatic measurement of the stator resistance or determination of the precise motor data
Programmable direct current braking
Built-in brake chopper for 4 quadrant operation, optional brake resistors (internal/external) (Only size 2)
2 analog inputs (switchable between current and voltage operation), which can also be used as
digital inputs.
3 digital inputs
2 digital outputs
Temperature sensor input (TF+/TF-)
NORD system bus for connection of additional modules, with switchable termination resistor and
address which can be set with DIP switches.
Four separate online switchable parameter sets
Diagnostic LEDs
RS232/RS485 interface via RJ12 plug
Additional features of the SK 190E:
Integrated AS interface
1.2 Delivery
Check the equipment immediately after delivery/unpacking for transport damage such as deformation or
loose parts.
If there is any damage, contact the carrier immediately and carry out a thorough assessment.
Important! This also applies even if the packaging is undamaged.
1.3 Scope of supply
Standard version: IP55 (optionally IP66)
Operating instructions as PDF file on CD ROM
including NORD CON, (PC-based parameterisation software)
Available accessories:Braking resistor, required for energy feedback, Section 2.3
(Selection) Matching RJ12 to SUB-D9 adapter cable to connection to a PC
SK CSX-3H, SimpleBox, 4-digit 7-segment LED display
SK PAR-3H, ParameterBox, plain text LCD display

SK 180E Manual for frequency inverters
10 Pre-series version BU 0180 GB-2313
Extension modules:
internal SK CU4-IOE, internal I/O extension
SK CU4-PBR, internal PROFIBUS DP® module
SK CU4-CAO, internal CANopen® module
SK CU4-DEV, internal DeviceNet™ module
SK CU4-ECT, internal EtherCAT® module
SK CU4-POT , Potentiometer adapter: internal potentiometer/switch module
SK CU4-REL, internal setpoint converter for bipolar analog signals, incl. 2 relays
SK CU4-MBR, internal brake rectifier for controlling electromechanical brakes
SK TIE4-POT, potentiometer module
SK TIE4-SWT, direction selector switch module
external SK TU4-IOE, external I/O extension
SK TU4-PBR, external PROFIBUS DP® module
SK TU4-CAO, external CANopen® module
SK TU4-DEV, external DeviceNet™ module
SK TU4-ECT, external EtherCAT® module
SK TU4-PNT, external PROFINET IO® module
SK TU4-POL, external Powerlink module
SK TU4-EIP, external Ethernet/IP™ module
SK TI4-TU-BUS or NET or MSW, connection unit TU4
SK TIE4-WMK-TU, wall-mounting kit TU4
SK TU4 MSW, external maintenance switch
NOTE: Details for the use of the relevant bus systems can be found in the applicable supplementarybus manual.
> www.nord.com <

1 General
BU 0180 GB-2313 Pre-series version 11
1.4 Safety and installation information
The frequency inverters are equipment for use in industrial high voltage systems and are operated at volt-
ages that could lead to severe injuries or death if they are touched.
Installation and other work may only be carried out by qualified electricians and with the
device disconnected. The operating instructions must always be available to these per-
sons and must be strictly observed.
Local regulations for the installation of electrical equipment and accident prevention
must be complied with.
The equipment continues to carry hazardous voltages for up to 5 minutes after being
switched off at the mains.
For single phase operation (115/230V) the mains impedance must be at least 100H for
each conductor. If this is not the case, a mains choke must be installed.
For safe isolation from the mains, all poles of the supply cable to the frequency inverter
must be able to be disconnected.
Even during motor standstill (e.g. caused by an electronic block, blocked drive or output
terminal short circuit), the line connection terminals, motor terminals and braking resistor
terminals may still conduct hazardous voltages. A motor standstill is not identical to elec-
trical isolation from the mains.
Warning, with certain settings, the frequency inverter/motor can start up automatically
after the mains are switched on.
The frequency inverter is only intended for permanent connection and may not be oper-
ated without effective earthing connections which comply with local regulations for large
leakage currents (> 3.5mA). VDE 0160 stipulates the installation of a second earthing
conductor or an earthing conductor cross-section of at least 10 mm2.
A universal leakage current-sensitive circuit breaker (type B) compliant with EN
50178/VDE 0160 must be used.
In normal use, frequency inverters are maintenance-free. The cooling surfaces must be
regularly cleaned with compressed air if the ambient air is dusty.
The frequency inverters are suitable for operation on TN or TT networks and with obser-
vation of the measures described in Section 2.7.4, they are also suitable for IT networks.

SK 180E Manual for frequency inverters
12 Pre-series version BU 0180 GB-2313
CAUTION
The heat sink and all other metal components can heat up to temperatures above 70°C.
When mounting, sufficient distance from neighboring components must be maintained. When
working on the components, allow sufficient cooling time beforehand
Protection against accidental contact may need to be provided.
ATTENTION
DANGER TO LIFE!
The power unit can continue to carry voltages for up to 5 minutes after being switched off at
the mains. Inverter terminals, motor cables and motor terminals may carry voltage!
Touching open or free terminals, cables and equipment components can lead to severe injury
or death!
Work may only be carried out by qualified specialist electricians and with the electrical supply
to the equipment disconnected!
CAUTION
Children and the general public must be kept away from the equipment!
The equipment may only be used for the purpose intended by the manufacturer.
Unauthorised modifications and the use of spare parts and additional equipment which has
not been purchased from or recommended by the manufacturer of the device may cause fire,
electric shock and injury.
Keep these operating instructions in an accessible location and give them to all operators!
WARNING
This product is intended for use in an industrial environment and is subject to sales
restrictions according to IEC 61800-3. Depending on the type of installation and the length of
the motor connection cable this product can cause high frequency interference, in which
case the user may be required to take appropriate measures.
An appropriate measure would be the inclusion of a recommended mains filter.

1 General
BU 0180 GB-2313 Pre-series version 13
1.5 Certifications
1.5.1 European EMC Directive
If the frequency inverter is installed according to the recommendations in
this manual, it meets all EMC directive requirements, as per the EMC prod-
uct standard for motor-operated systems EN 61800-3. (See also Section 9.3
Electromagnetic Compatibility [EMC].)
1.5.2 UL and cUL approval (in preparation)
The section applies for all devices of sizes 1 –2. All frequency inverters are equipped with motor overload
protection. Further technical details can be found in Section 8.2.
NOTE
"Integral solid state short circuit protection does not provide branch circuit protection. Branch
circuit protection must be provided in accordance with the National Electric Code and any
additional local codes."
The integral short-circuit protection does not provide branch circuit protection. Branch circuit
protection must be provided in accordance with the "National Electric Code" and all additional
local regulations.
NOTE
“The device has to be mounted according to the manufacturer instructions.”
"Use 80°C Copper Conductors Only"
“Connection of copper cable with an insulation rating of at least 80°C“
(only refers to connection cables (mains and motor cables)
"These products are intended for use in a pollution degree 2 environment"
UL Approval - File No. E171342
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 100000 rms
Symmetrical Amperes, 120 Volts maximum (SK 1x0E-xxx-112), 240 Volts maximum
(SK 1x0E-xxx-323) or 480 Volts maximum (SK 1x0E-xxx-340) and when protected by
RK5 class or faster fuses as indicated in chapter 8.2.”
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 10000 rms Symmetrical Amperes, 120 Volts max-
imum (SK 1x0E-xxx-112), 240 Volts maximum (SK 1x0E-xxx-323) or 480 Volts maximum (SK 1x0E-xxx-340) and when
protected by Circuit Breaker (inverse time trip type) in accordance with UL 489”, current and voltage ratings can be
found in chapter 8.2.
„The torque value for the field wiring terminals for mains circuit terminals, motor terminals, break terminals and breaking
resistor terminals must be 11 … 15 lb-in (1.2 … 1.5Nm). The torque value for the field wiring terminals for control circuit
terminals must be 4.4 … 5.3 lb-in (0.5 … 0.6Nm).”

SK 180E Manual for frequency inverters
14 Pre-series version BU 0180 GB-2313
cUL Approval - File No. E171342
“cUL only in combination with SK CIF-340-30 or SK CIF-340-60 for 380-480V models
and SK CIF-323-20 or SK CIF-323-40 for 3 phase 200-240V rated models”. The recog-
nized transient surge suppression filter board has to be connected between supply and
the input of the drive according to the instruction manual.
Remarks:
cUL approval for 110-120V models provided without filter board
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 5000 rms Symmetrical Amperes, 120 Volts maxi-
mum (SK 1x0E-xxx-112), 240 Volts maximum (SK 1x0E-xxx-323) or 480 Volts maximum (SK 1x0E-xxx-340) and when
protected by RK5 class or faster fuses according to instruction manual chapter 8.2.”
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 5000 rms Symmetrical Amperes, 120 Volts maxi-
mum (SK 1x0E-xxx-112), 240 Volts maximum (SK 1x0E-xxx-323) or 480 Volts maximum (SK 1x0E-xxx-340) and when
protected by Circuit Breaker (inverse time trip type) in accordance with UL 489”, current and voltage ratings according to
instruction manual chapter 8.2.
1.5.3 C-Tick labeling
NORD frequency inverters fulfill all the relevant regulations in Australia and
New Zealand.
1.5.4 RoHS compliance
NORD frequency inverters are designed to be RoHS compliant according to Directive
2002/95/EEC.
N 23134

1 General
BU 0180 GB-2313 Pre-series version 15
1.6 Nomenclature / type codes
Unique type codes have been defined for the individual modules and devices. These provide individual
details of the device type and its electrical data, protection class, fixing version and special versions.
A differentiation is made according to the following groups:
Group
Example of type code
Basic unit
SK 180E-370-340-A (-C)
Connection unit - Technology Unit
SK TI4-TU-MSW (-C-WMK-TU)
Optional modules
SK TU4-MSW (-C)
Extension modules
SK TIE4-M12-INI
The type designation resulting from this type code can be obtained
from the name plate which is attached to or printed on the relevant
module.
Optional module
SK TU4-xxx (-…)
Terminal box
Optional module
Frequency inverter
SK 1x0E

SK 180E Manual for frequency inverters
16 Pre-series version BU 0180 GB-2313
1.6.1 Type code / Frequency inverter - Basic device
SK 180E-370-323-B (-C)
IP protection class: Standard = IP55, C = “coated”= IP66
Radio interference filter: O = without, A = Class A1, B= Class B1
Mains voltage: x12 = 115V, x23 = 230V, x40 = 400V
Number of mains phases: 1xx = single phase, 3xx = 3-phase
Digits before decimal point for power: 0= 0.xx, 1 = 0x.x0, 2 = 0xx.0
Device nominal power: 250 = 0.25kW, 370 = 0.37kW, ... 221 = 2.2kW
Device series: SK 180E, SK 190E
(...) Options, only implemented if required.
1.6.2 Type codes / Adapter unit - Technology Unit
SK TI4-TU-BUS (-C-WMK-TU)
Wall mounting kit: -1 = Size 1 + 2, -2 = Size 3
IP protection class: Standard = IP55, C = “coated”IP66
Suitable device types:NET = optional net module (e.g. TU4-24V-…)
MSW = maintenance switch (SK TU4-MSW)
BUS = optional bus module (z.B. CANopen: TU4-CAO)
Group: TU =Technology unit
Device series: SK TI4 = Adapter unit SK TI4
(...) Options, only implemented if required.
1.6.3 Type codes / Optional modules
For bus module or I/O extension
SK TU4-CAO (-C-M12)
M12 system connectors: only TU4, alternative to terminals
IP protection class: Standard = IP55, C = “coated”IP66
Option type: CAO = CANopen, PBR = Profibus, ECT = EtherCAT®
DEV = DeviceNet, IOE = I/O extension
Option series: TU4 = external Technology Unit
CU4 = internal customer unit
(...) Options, only implemented if required.

1 General
BU 0180 GB-2313 Pre-series version 17
Optional internal
customer unit, SK CU4-…
Optional external
technology unit, SK TU4-…

SK 180E Manual for frequency inverters
18 Pre-series version BU 0180 GB-2313
1.7 Version with protection class IP55 / IP66
The frequency inverters and additional modules are available in protection classes IP55 (standard) or IP66
(optional). The protection class IP66 must always be stated when ordering!
There are no restrictions or differences to the scope of functions in either protection class. In order to differ-
entiate the protection classes, modules with protection class IP66 are given an extra “-C” (coated coated
PCBs) in their type designation. e.g. SK 180E-750-340-B-C
IP55 version:
The IP55 version of the external frequency inverter is the standard version. Both versions (motor-mounted,
installed on the motor or wall mounted on the wall bracket) are available. In addition, all adapter units, tech-
nology units and customer units are available for this design.
IP66 version:
In contrast to the IP55 version the IP66 version is a modified option. Both versions (motor-integrated, close
to motor) are also available. The modules available to the IP66 design (adapter units, technology units and
customer units) have the same functionalities as the corresponding IP55 design modules.
NOTE
The modules for the IP66 design are identified by an additional "-C" and are modified
according to the following special measures!
Special measures:
impregnated PCBs,
Powder coating RAL 9006 (white aluminium) for housing
Low pressure test
NOTE
For all versions, care must be taken that the cable and the cable gland are carefully
matched. Wherever possible, the cables should be inserted so that water is deflected away
from the device (if necessary use loops). This is essential to ensure that the required
protection class is maintained.

2 Assembly and installation
BU 0180 GB-2313 Pre-series version 19
2 Assembly and installation
2.1 Installation and assembly
The frequency inverters are available in various sizes depending on their output. They can be mounted on
the terminal box of a motor or in its immediate vicinity.
Motor-mounted version
Wall-mounted version
NOTE
The equipment requires sufficient ventilation to protect against overheating. Details of
power reductions and possible ambient temperatures as well as other details can be found
in the section 8 "Technical Data".

SK 180E Manual for frequency inverters
20 Pre-series version BU 0180 GB-2313
2.1.1 Mounting the housing box
On delivery of a complete drive unit (gear unit + motor + frequency inverter) the frequency inverter is always
fully installed and tested.
NOTE
Installation of an IP66-compliant frequency inverter must be carried out by NORD, as special
measures have to be implemented. IP66 components retrofitted on site cannot ensure that this
protection class is guaranteed.
When delivered separately, the frequency inverter includes the following components:
Frequency inverters
Screws and contact washers for mounting the motor terminal box.
Pre-fabricated cable for motor and PTC connections
Procedures:
1. If necessary, remove the original terminal box from the NORD motor, so that only the base of the termi-
nal box and the terminal strip remain.
2. Set the jumpers for the correct motor circuit and connect the pre-fabricated cables for motor and PTC
connections to the respective connection points on the motor.
3. Mount the cast housing on the terminal box base of the NORD motor using the existing screws and seal
as well as the enclosed lock washers. Position the cast housing with the cooling fins towards the fan end
of the motor. Check the adaptability for different motor manufacturers.
4. Connect the motor cables U, V, W to the power terminal block and the PTC cable TF+, TF- to the control
terminal block 38, 39.