nord NORDAC FLEX SK 200E Series User manual

BU 0200 – en-US
NORDAC FLEX (SK 200E ... SK 235E)
Users Manual for Frequency Inverters

NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
2 BU 0200 en-US-4920
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Documentation
Title:
BU 0200
Order No.:
6072003
Series:
SK 200E
Device series:
SK 200E, SK 210E, SK 220E, SK 230E,
SK 205E, SK 215E, SK 225E, SK 235E
Device models:
SK 2xxE-250-112-O ... SK 2xxE-750-112-O
0.25 – 0.75 kW, 1~ 100-120 V, Out: 230 V
SK 2xxE-250-123-A ... SK 2xxE-111-123-A
0.25 – 1.1 kW, 1~ 200-240 V
SK 2xxE-250-323-A ... SK 2xxE-112-323-A
0.25 – 11.0 kW, 3~ 200-240 V 1)
SK 2xxE-550-340-A ... SK 2xxE-222-340-A
0.55 – 22.0 kW, 3~ 380-500 V 2)
1) Size 4 (5.5 – 11.0 kW) only in version SK 2x0E
2) Size 4 (11.0 – 22.0 kW) only in version SK 2x0E
Version list
Title,
Date
Order number Device
software
version
Remarks
BU 0200,
March 2009
6072003 / 1009
V 1.1 R1
First edition
Further revisions:
March, December 2010, May 2011, October 2011, June 2014
An overview of the changes in the above mentioned editions can be found in the respective document.
BU 0200,
May 2015
6072003 / 2115
V 2.0 R1
Among other things
• General corrections
• Structural adaptations in the document (Chapter
"Options and Accessories" broken down, content
reorganized)
• New parameters: P240 – 247, P330 – 334
• Adaptation of parameters: P003, 100, 105, 108,
109, 110, 200, 219, 220, 300, 312, 313, 315, 316,
327, 401, 418, 420, 436, 480, 481, 502, 504, 535,
538, 550, 709, 740, 741, 745
• Error messages E006, E007, E022 – 024, I000.6,
I000.7
• Operation of PM synchronous motors possible
• PLC available
• New display of scope of delivery/accessory
overview
• Revision of UL/cUL, plus inclusion of "group
protection"
• HTL rotary encoder, evaluation of zero track
possible

Version list
BU 0200 en-US-4920 3
Title,
Date
Order number Device
software
version
Remarks
BU 0200,
March 2016
6072003 / 1216
V 2.1 R0
Among other things
• General corrections
• Structural adjustments to document
• Removal of various descriptions for accessories
(reference to additional documents Technical
Information)
• Adaptation of parameters: P513, 504, 520, 550,
560, 703
• Error messages I000.8, I000.9 added
• Revision of section "UL/cUL", including for CSA:
Voltage limitation filter (SK CIF) no longer required
Module removed from document
• Installation description of toroidal core (ferrite) for
improving EMC with size 4 added
• AS Interface, addition of device versions …-AXB
and …-AUX.
• Updating of EC/EU conformity declarations
BU 0200,
December
2017
6072003 / 5117
V 2.1 R3
Among other things
• General corrections
• Adaptation of safety information
• Revision of warnings and hazard notes
• Adaptation for ATEX, outdoor installation and
braking resistors
• Adapter kits for motor mounting and wall mounting
kits now divided into versions for IP55 and IP66
• Adaptation of parameters: P106, 107, 206, 208,
211, 212, 220, 330, 331, 400, 434, 546, 558, 709
BU 0200,
July 2018
6072003 / 3118
V 2.1 R4
Among other things
• General corrections
• Adaptation of safety information
• Adaptations for wall mounting kits
• Adaptation for ATEX, outdoor installation and
braking resistors
• Addition of EAC EX
• Adaptations for AS interface
• Adaptation of parameters: P331, 332, 333, 555,
556, 557
• Correction of standardization of setpoint and actual
values
• Motor data extended with 100 Hz characteristic
curve
BU 0200,
December
2020
6072003 / 4920
V 2.2 R1
Among other things
• General corrections
• New parameter P336, P780
• Adaptation of parameters: P212, 245, 301, 504,
558, 556, 557
• Error message E7.1
Table 1: Version List BU0200
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NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
4 BU 0200 en-US-4920
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 utilization 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/
Tel. [phone] •Fax [phone]
Member of the NORD DRIVESYSTEMS Group
=== En de der Lis te für T extmar ke Copyr ight = ==

Publisher
BU 0200 en-US-4920 5

NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
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Table of Contents
=== En de der Lis te für T extmar ke Inhal tsver zeic hnis ===
1General.......................................................................................................................................................11
1.1 Overview..........................................................................................................................................13
1.2 Delivery............................................................................................................................................16
1.3 Scope of supply ...............................................................................................................................17
1.4 Safety, installation and application information................................................................................22
1.5 Warnings and hazard information ....................................................................................................26
1.5.1 Warnings and hazard information on the product...............................................................26
1.5.2 Warnings and hazard information in the document ............................................................27
1.6 Standards and approvals.................................................................................................................27
1.6.1 UL and CSA approval.........................................................................................................29
1.7 Model code/nomenclature................................................................................................................32
1.7.1 Nameplate..........................................................................................................................32
1.7.2 Variable Frequency Drive model code - basic device.........................................................33
1.7.3 Variable Frequency Drive model code – Connection unit...................................................33
1.7.4 Model code for optional modules........................................................................................34
1.7.5 Model code, connection unit for technology unit.................................................................35
1.7.6 Extensions model code ......................................................................................................35
1.8 Output/size assignment....................................................................................................................36
1.9 Version with IP55/IP66 rating...........................................................................................................36
2Mounting and installation.........................................................................................................................38
2.1 Mounting SK 2xxE............................................................................................................................38
2.1.1 Installation of insulating plate – size 4................................................................................40
2.1.2 Motor installation steps.......................................................................................................41
2.1.2.1 Adapters for motor size 42
2.1.2.2 Dimensions, SK 2xxE mounted on motor 43
2.1.3 Wall mounting.....................................................................................................................44
2.1.3.1 Wall mounting kit without fan 44
2.1.3.2 Wall mounting kit with fan 46
2.1.3.3 Variable Frequency Drive mounting positions with wall mounting kit 48
2.2 Installation of optional modules........................................................................................................49
2.2.1 Optional slots on the device................................................................................................49
2.2.2 Mounting of internal customer unit SK CU4-… (installation)...............................................51
2.2.3 Installation of external technology units SK TU4-… (attachment).......................................52
2.3 Braking resistor (BW) - (from size 1)................................................................................................53
2.3.1 Internal braking resistor SK BRI4-…...................................................................................53
2.3.2 External braking resistor SK BRE4-... / SK BRW4-… / SK BREW4-…...............................56
2.3.3 Braking resistor assignments..............................................................................................58
2.4 Electrical connection........................................................................................................................59
2.4.1 Wiring guidelines................................................................................................................60
2.4.2 Electrical connection of power unit.....................................................................................61
2.4.2.1 Power supply connection (L1, L2(/N), L3, PE) 62
2.4.2.2 Motor cable 64
2.4.2.3 Braking resistor (+B, -B) – (from size 1) 64
2.4.2.4 Electromechanical brake 65
2.4.3 Electrical connection of the control unit..............................................................................66
2.4.4 Power supply unit SK xU4-24V-… - connection example...................................................73
2.5 Color and contact assignments for the incremental encoder (HTL).................................................75
2.6 Operation in potentially explosive environments..............................................................................76
2.6.1 Operation in potentially explosive environments - ATEX zone 22 3D.................................77
2.6.1.1 Modification of the device for compliance with category 3D 77
2.6.1.2 Options for ATEX zone 22, category 3D 78
2.6.1.3 Maximum output voltage and torque reduction 80
2.6.1.4 Commissioning information 80
2.6.1.5 EU conformity declaration - ATEX 82
2.6.2 Operation in potentially explosive environments - EAC Ex.................................................83
2.6.2.1 Modification of the device 83
2.6.2.2 Further information 84
2.6.2.3 EAC Ex Certificate 84
2.7 Outdoor installation..........................................................................................................................85

Table of Contents
BU 0200 en-US-4920 7
3Display, operation and options................................................................................................................86
3.1 Control and parameterization options ..............................................................................................87
3.1.1 Use of control and parameterization units..........................................................................88
3.1.2 Connection of multiple devices to one parameterization tool..............................................89
3.2 Optional modules.............................................................................................................................90
3.2.1 Internal customer units SK CU4-… (installation of modules)..............................................90
3.2.2 External technology units SK TU4-… (module attachment) ...............................................92
3.2.3 Plug connector....................................................................................................................95
3.2.3.1 Plug connectors for power connections 95
3.2.3.2 Plug connectors for control connection 97
3.2.4 Potentiometer adapter, SK CU4-POT.................................................................................98
4Commissioning .......................................................................................................................................100
4.1 Factory settings..............................................................................................................................100
4.2 Selecting the operating mode for motor control .............................................................................101
4.2.1 Explanation of the operating modes (P300) .....................................................................101
4.2.2 Overview of control parameter settings............................................................................103
4.2.3 Motor control commissioning steps ..................................................................................104
4.3 Starting up the device....................................................................................................................105
4.3.1 Connection .......................................................................................................................105
4.3.2 Configuration....................................................................................................................106
4.3.2.1 Parameterization 106
4.3.2.2 DIP switches (S1) 107
4.3.2.3 DIP switches, analog input (only SK 2x0E) 109
4.3.2.4 Potentiometers P1 and P2 (SK 2x0E size 4 and SK 2x5E) 110
4.3.3 Plug-in EEPROM (memory module).................................................................................111
4.3.3.1 Replacing the plug-in EEPROM (memory module) 111
4.3.3.2 Copy function 112
4.3.3.3 Copy function DIP switches S1 – 6 "COPY" 112
4.3.4 Commissioning examples.................................................................................................114
4.3.4.1 SK 2x0E minimum configuration 114
4.3.4.2 SK 2x5E minimum configuration 115
4.4 Temperature sensors.....................................................................................................................117
4.5 AS interface (AS-i) .........................................................................................................................120
4.5.1 The bus system................................................................................................................120
4.5.2 Features and technical data.............................................................................................121
4.5.3 Bus structure and topology...............................................................................................122
4.5.4 Commissioning.................................................................................................................123
4.5.4.1 Connection 123
4.5.4.2 Displays 126
4.5.4.3 Configuration 127
4.5.4.4 Addressing 129
4.5.5 Certificate.........................................................................................................................130
5Parameter.................................................................................................................................................131
5.1 Parameter overview.......................................................................................................................135
5.2 Description of parameters..............................................................................................................138
5.2.1 Operating display..............................................................................................................139
5.2.2 Basic parameter ...............................................................................................................141
5.2.3 Motor data/characteristic curve parameter.......................................................................148
5.2.4 Control parameter.............................................................................................................157
5.2.5 Control terminals ..............................................................................................................166
5.2.6 Additional parameters.......................................................................................................188
5.2.7 Positioning........................................................................................................................208
5.2.8 Informations......................................................................................................................209
6Operating status messages ...................................................................................................................220
6.1 Display of messages......................................................................................................................221
6.2 Diagnostic LEDs on device............................................................................................................221
6.2.1 Diagnostic LEDs on SK 2x0E (size 1 … 3).......................................................................222
6.2.2 Diagnostic LEDs on the SK 2x0E (size 4) and SK 4x5E...................................................223
6.3 Messages.......................................................................................................................................225
6.4 FAQ operational problems.............................................................................................................234
7Technical Data.........................................................................................................................................236
7.1 General data for variable frequency drive......................................................................................236
7.2 Electrical data ................................................................................................................................237

NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
8 BU 0200 en-US-4920
7.2.1 Electrical data 1~115 V.....................................................................................................238
7.2.2 Electrical data 1~230 V.....................................................................................................239
7.2.3 Electrical data 3~230 V.....................................................................................................240
7.2.4 Electrical data 3~400 V.....................................................................................................243
8Additional information............................................................................................................................246
8.1 Setpoint processing........................................................................................................................246
8.2 Process controller ..........................................................................................................................247
8.2.1 Process controller application example............................................................................248
8.2.2 Process controller parameter settings..............................................................................249
8.3 Electromagnetic compatibility (EMC) .............................................................................................250
8.3.1 General Provisions...........................................................................................................250
8.3.2 EMC evaluation................................................................................................................251
8.3.3 EMC of device..................................................................................................................252
8.3.4 EU Declaration of Conformity...........................................................................................254
8.4 Reduced output power...................................................................................................................255
8.4.1 Increased heat dissipation due to pulse frequency...........................................................255
8.4.2 Reduced overcurrent due to time.....................................................................................256
8.4.3 Reduced overcurrent due to output frequency..................................................................257
8.4.4 Reduced output current due to line voltage......................................................................258
8.4.5 Reduced output current due to the heat sink temperature................................................258
8.4.6 Reduced output current due to speed ..............................................................................259
8.5 Operation on the VFD circuit breaker.............................................................................................260
8.6 System bus....................................................................................................................................261
8.7 Energy efficiency............................................................................................................................264
8.8 Motor data - characteristic curves..................................................................................................265
8.8.1 50 Hz characteristic curve................................................................................................265
8.8.2 87 Hz characteristic curve (only 400 V devices)...............................................................268
8.8.3 100 Hz characteristic curve (only 400 V devices).............................................................270
8.9 Standardization of setpoint/target values.......................................................................................272
8.10 Definition of setpoint and actual value processing (frequencies) ...................................................273
9Maintenance and servicing information................................................................................................274
9.1 Maintenance Instructions...............................................................................................................274
9.2 Service notes .................................................................................................................................275
9.3 Abbreviations.................................................................................................................................276

List of illustrations
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List of illustrations
=== En de der Lis te für T extmar ke Abbi ldung sverz eich nis ===
Figure 1: Device with internal SK CU4-................................................................................................................. 15
Figure 2: Device with external SK CU4-................................................................................................................ 15
Figure 3: Nameplate.............................................................................................................................................. 32
Figure 4: Connection unit size 1 … 3..................................................................................................................... 41
Figure 5: Connection unit size 4............................................................................................................................ 41
Figure 6: Example of motor size adaptation.......................................................................................................... 42
Figure 7: SK 2xxE with wall mounting kit............................................................................................................... 44
Figure 8: SK TIE4-WMK-1-K (or. -2-K).................................................................................................................. 45
Figure 9: SK TIE4-WMK-3..................................................................................................................................... 45
Figure 10: SK 2xxE with wall mounting kit............................................................................................................. 46
Figure 11: SK TIE4-WMK… (…1-EX / 2-EX)......................................................................................................... 46
Figure 12: SK 2xxE with wall mounting kit............................................................................................................. 47
Figure 13: SK TIE4-WMK-L ….............................................................................................................................. 47
Figure 14: Variable Frequency Drive mounting positions with wall mounting kit.................................................... 48
Figure 15: Optional slots on the connection unit.................................................................................................... 49
Figure 16: Jumpers for system adaptation ............................................................................................................ 63
Figure 17: Connection example, power supply unit SK xU4-24V-…...................................................................... 73
Figure 18: SK 2xxE (size 1), top view.................................................................................................................... 86
Figure 19: SK 2xxE (size 1), internal view............................................................................................................. 86
Figure 20: Simple Box, handheld, SK CSX-3H...................................................................................................... 88
Figure 21: Parameter Box, handheld, SK PAR-3H................................................................................................ 88
Figure 22: internal customer units SK CU4 … (example)...................................................................................... 90
Figure 23: external technology units SK TU4-… (example)................................................................................... 92
Figure 24: Examples of devices with connectors for power connection................................................................. 95
Figure 25: Connection diagram SK CU4-POT, example SK 2x0E......................................................................... 98
Figure 26: Connection diagram and parameterization of SK CU4-POT, example SK 2x5E.................................. 99
Figure 27: Replacing the plug-in EEPROM......................................................................................................... 111
Figure 28: Connecting terminals AS-i, left size 1 – 3, right size 4........................................................................ 123
Figure 29: Diagnostic openings SK 2x0E (size 1 … 3)........................................................................................ 222
Figure 30: Diagnostic openings SK 2x0E size 4 or SK 4x5E............................................................................... 223
Figure 31: Setpoint processing............................................................................................................................ 246
Figure 32: Process controller flow diagram ......................................................................................................... 247
Figure 33: Wiring recommendation...................................................................................................................... 253
Figure 34: Heat losses due to pulse frequency ................................................................................................... 255
Figure 35: Output current due to line voltage ...................................................................................................... 258
Figure 36: Derating factor "k" for motor installation (self-ventilated).................................................................... 259
Figure 37: Energy efficiency due to automatic magnetization optimization......................................................... 264
Figure 38: 50 Hz characteristic curve.................................................................................................................. 265
Figure 39: 87 Hz characteristic curve.................................................................................................................. 268
Figure 40: 100 Hz characteristic curve................................................................................................................ 270

NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
10 BU 0200 en-US-4920
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List of tables
=== En de der Lis te für T extmar ke Tab ellenv erzeic hnis = ==
Table 1: Version List BU0200.................................................................................................................................. 3
Table 2: Additional characteristics, size 1 ... 3....................................................................................................... 14
Table 3: Additional characteristics, size 4.............................................................................................................. 14
Table 4: Warnings and hazard information on the product.................................................................................... 26
Table 5: Standards and approvals......................................................................................................................... 27
Table 6: Standards and approvals for explosion hazard environments................................................................. 28
Table 7: Assignment of braking resistors to variable frequency drive.................................................................... 58
Table 8: Connection data ...................................................................................................................................... 61
Table 9: external bus modules and IO extensions SK TU4- … ............................................................................. 93
Table 10: external modules with power supply unit SK TU4-24V- …/SK TU4-POT- …......................................... 94
Table 11: external modules – maintenance switch SK TU4-MSW- …................................................................... 94
Table 12: Temperature sensors, adjustment....................................................................................................... 117
Table 13: AS- interface, connection of signal and supply lines............................................................................ 123
Table 14: FAQ operational problems................................................................................................................... 235
Table 15: EMC comparison between EN 61800-3 and EN 55011....................................................................... 251
Table 16: Overview according to product standard EN 61800-3 ......................................................................... 253
Table 17: Overcurrent relative to time ................................................................................................................. 256
Table 18: Overcurrent relative to pulse and output frequency............................................................................. 257
Table 19: Processing of setpoints and actual values in the variable frequency drive.......................................... 273
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1 General
BU 0200 en-US-4920 11
1 General
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The SK 2xxE series is based on the tried and tested NORD platform. The devices are characterized
by their compact design and optimum control characteristics, and have uniform parameterization.
The devices have sensorless current vector control with a wide range of settings. All three-phase
asynchronous motors that are suitable for inverter operation and permanent-magnet synchronous
motors can be operated in combination with suitable motor models, which always provide an
optimized voltage/frequency ratio. For the drive unit, this means very high starting and overload
torques with constant speed.
The power range is from 0.25 kW to 22.0 kW.
This series of devices 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 variable
frequency drive 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 are available for optional functions and bus systems (http://www.nord.com/).
Information
Accessories
Changes may also be made to the accessories that are mentioned in the manual. Current details
about these are included in separate data sheets which are listed at www.nord.com
under the
heading Documentation → Manuals → Electronic Drive Solutions → 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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Installation directly on a motor is typical of this device series. Alternatively, optional accessories are
also available for mounting the devices close to the motor, e.g. on the wall or on a machine frame.
The internal RS232 interface (access via RJ12 connection) can be used to access all parameters. The
parameters are accessed via an optional Simple Box or Parameter Box, for example.
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Parameter settings modified by the operator are backed up in the integrated, non-volatile memory of
the device.
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NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
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Up to firmware version 1.4 R1 data was backed up in the pluggable EEPROM. The EEPROM then
had to remain plugged in during operation.
In the simplest configuration for SK 2x0E, size 4 and the SK 2x5E units, even without the plugged-in
EEPROM, all important parameters can be set using two potentiometers and eight DIP switches.
LEDs are provided for operating status diagnostics. The use of a control module is therefore not
absolutely necessary.
Information Adaptation of parameter structure
With the software version change from V1.1 R1 to V1.2 R0 of the variable frequency drive, the structure of
individual parameters was changed (Section 5 "Parameter"), e. g.: up to version V 1.1 R2 (P417) was a single
parameter, but from version V1.2 R0 it was subdivided into two arrays ((P417) [-01] and [-02]).
When an EEPROM from a variable frequency drive with an earlier software version is plugged into a variable
frequency drive with software version V1.2 or higher, the stored data is automatically converted to the new format.
New parameters are stored with the default setting. This therefore provides correct functionality.
However, it is not permissible to plug in an EEPROM (memory module) with a software version of V1.2 or
higher into a variable frequency drive with a previous software version since this would lead to loss of all
data.
Information
DIP switch function change
The functional assignment of DIP switch S1-6 was changed in the software version change from V1.4 R1 to V1.4
R2 of the variable frequency drive (Section 4.3.2.2 "DIP switches (S1)"). The U/F function (changeover
between ISD control and the U/F characteristic) was replaced with the COPY function (triggering of data
exchange from the external EEPROM (memory module) to the internal EEPROM).
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1 General
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1.1 Overview
This manual describes two very similar basic versions of the SK 200E product family (NORDAC FLEX).
Wherever the SK 2xxE is mentioned below, this refers to information that applies to all devices in this
family.
If the information applies exclusively to versions SK 205E/SK 215E/SK 225E/SK 235E, this is
apparent from the designation SK 2x5E.
If the information only applies to versions SK 200E/SK 210E/SK 220E/SK 230E, this is recognizable
from the designation SK 2x0E.
Basic properties
• High starting torque and precise motor speed control setting by means of sensorless current vector
control
• Can be installed directly on, or close to the motor.
• Permissible ambient temperature -25°C to 50°C (please refer to the technical data)
• Integrated EMC line filter for limit curve class A/category C2 or C3 (not with 115 V devices)
• Automatic measurement of the stator resistance and determination of 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-)
• Evaluation of an incremental encoder via digital inputs possible
• NORD system bus for linking modular additional modules
• Four separate parameter sets that can be changed over online
• 8x DIP switches for minimal configuration
• LEDs for diagnosis (SK 2x5E incl. DI/DO signal statuses)
• RS232/485 interface via RJ12 plug
• Plug-in data memory (EEPROM)
• Integrated "POSICON" positioning control (BU 0210)
• CANopen absolute value encoder evaluation via the NORD system bus
• Operation of three-phase current asynchronous motors (ASM) and Permanent-Magnet
Synchronous Motors (PMSM)
• Integrated PLC (BU 0550)
Differences between the individual versions (SK 200E/SK 205E/… SK 235E) are summarized in the
following table and will be described in this manual.

NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
14 BU 0200 en-US-4920
Additional characteristics, sizes 1 ... 3
Feature 200E 205E 210E 215E 220E 225E 230E 235E
Integrated 24 V power supply unit
x
x
x
x
Optionally available 24 V power supply unit
x
x
x
x
Number of digital inputs (DIN)
4
4
3
3
4
4
3
3
Number of digital outputs (DO)
2
1
2
1
2
1
2
1
Number of analog inputs (AIN)
2
2
1
1
Additional 2 potentiometers for minimal configuration
x
x
x
x
Electromechanical brake control
x
x
x
x
Safe pulse block (STO/SS1) (

BU0230)
x
x
x
x
AS interface (4I/4O)
x
x
x
x
Table 2: Additional characteristics, size 1 ... 3
Additional characteristics, size 4
Feature 200E 210E 220E 230E
Integrated 24 V power supply unit
x
x
x
x
Number of digital inputs (DIN)
4
3
4
3
Number of digital outputs (DO)
2
2
2
2
Number of analog inputs (AIN)
2
2
1
1
Additional 2 potentiometers for minimal configuration x x x x
Electromechanical brake control
x
x
x
x
Safe pulse block (STO/SS1) (

BU0230)
x
x
AS interface (4I/4O)
x
x
Table 3: Additional characteristics, size 4
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1 General
BU 0200 en-US-4920 15
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Optional modules
Optional modules are used to extend the functionality of the device.
These options are available as an installation variant, the so-called SK CU4-… customer unit, and also
as an attachment variant, the so-called SK TU4-… technology unit. Apart from the mechanical
differences, the installation and attachment variants also have some functional differences.
Figure 1: Device with internal SK CU4-... Figure 2: Device with external SK CU4-...
Attachment variant
The external technology unit (Technology Unit SK TU4-…) is externally attached to the device and
is therefore easy to access.
A technology unit basically requires the use of a suitable SK TI4-TU-… connection unit.
The power supply and signal lines are connected using the screw clamps of the connection unit.
Depending on the version, additional connections for connectors (e.g. M12 or RJ45) may be available.
The optional wall mounting kit SK TIE4-WMK-TU also allows the technology units to be mounted away
from the device.
Built-in variant
The internal customer unit (Customer Unit, SK CU4-...) is integrated in the device. The power
supply and signal lines are connected using screw clamps.
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NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
16 BU 0200 en-US-4920
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The SK CU4-POT potentiometer adapter is an exception among the SK CU4 Modules since it is not
integrated in the device but attached to it.
"Smart" optional modules and the device communicate via the system bus. Smart optional modules
are modules with their own processor and communication technology as is the case with field bus
modules, for example.
The variable frequency drive can manage the following options via its system bus:
1 x parameterization unit SK PAR-3H and (via an RJ12 connector)
1 x field bus option (e.g. Profibus DP), internal or external and
2 x I/O extension (SK xU4-IOE-…), internal and/or external
1 x CANopen absolute encoder
Up to 4 variable frequency drives with their appropriate options can be connected to a system bus.
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1.2 Delivery
Check the device 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.
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1 General
BU 0200 en-US-4920 17
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1.3 Scope of supply
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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: • IP55 version of device (optionally IP66)
• Operating instructions as PDF file on CD ROM including NORD CON, (PC
parameterization software)
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Available accessories:
Designation Example Description
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Control and parameterization options
Handheld parameterization
units for temporary connection
to the device
For commissioning, parameterization and control
of the device.
SK PAR-3H, SK CSX-3H
(Section 3.1.1 "Use of control and
parameterization units")
Handheld control units
For controlling the device,
Model SK POT- …
(Section 3.1.1 "Use of control and
parameterization units")
NORD CON
MS Windows ® - based
software
For commissioning, parameterization and control
of the device
Refer to www.nord.com
NORD CON
(Free download)
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Bus interface
Internal bus interfaces
Customer unit for installation device for:
CANopen, DeviceNet, EtherCAT, Ethernet/IP,
Powerlink, Profibus DP, Profinet IO,
Model SK CU4- …
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
External bus interfaces
Technology unit attached to the device or
alternatively for wall mounting (wall mounting kit
required) for: CANopen, DeviceNet, EtherCAT,
Ethernet/IP, Powerlink, Profibus DP, Profinet IO,
Model SK TU4- …
(Section 3.2.2 "External technology units
SK TU4-… (module attachment)")
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NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
18 BU 0200 en-US-4920
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Braking resistors
Internal braking resistors
Braking resistor installed in the device to divert
regenerative energy from the drive system
caused by conversion to heat. Regenerative
energy arises during braking processes or the
downward motion of loads,
Model SK BRI4- …
(Section 2.3.1 "Internal braking resistor SK
BRI4-…")
External braking resistors
Refer to:
Internal braking resistors,
but for attaching to the device
Model SK BRE4- …
(Section 2.3.2 "External braking resistor SK
BRE4-... / SK BRW4-… / SK BREW4-…")
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I/O expansions
Internal I/O expansion
Customer unit installed in the device to extend
the analog and digital inputs and outputs.
Model SK CU4-IOE…
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
Internal signal converter
Customer unit installed in the device to convert
bipolar analog signals to unipolar analog signals,
e.g. digital signals on relays
Model SK CU4-REL- …
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
External I/O extension
Technology unit attached to the device or
alternatively for wall mounting (wall mounting kit
required) to extend the analog and digital inputs
and outputs.
Model SK TU4-IOE- …
(Section 3.2.2 "External technology units
SK TU4-… (module attachment)")
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Power supply units
Internal power supply units
SK 2x5E: Power supply unit installed in the
device to generate the 24 VDC control power.
Model SK CU4-24V- …
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
External power supply units
SK 2x5E: Technology unit attached to the device
or alternatively for wall mounting (wall mounting
kit required) to generate the 24 VDC control
power.
Model SK TU4-24V- …
(Section 3.2.2 "External technology units
SK TU4-… (module attachment)")
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1 General
BU 0200 en-US-4920 19
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Wall mounting
Wall mounting kit for the device
Set for mounting the device, separate from the
motor (e.g. to a wall).
Model SK TIE4-WMK-…
(Section 2.1.3 "Wall mounting")
Wall mounting kit for SK TU4-…
modules
Set for mounting a technology unit, SK TU4-...,
separate from the device (e.g. to a wall).
Model SK TIE4-WMK-TU
(Section 3.2.2 "External technology units
SK TU4-… (module attachment)")
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Switches and potentiometers
Switch/potentiometer unit
(L – OFF – R/0 – 10 V)
Customer unit attached to the device for ease of
control of the device using 3-position switch and
potentiometers
Model SK CU4-POT
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
ATEX potentiometer
(0 – 10 V)
Potentiometer with ATEX capability attached to
the device for ease of control of the device
Model SK ATX-POT
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
Potentiometer
(0 – 10 V)
Potentiometer attached to the device for ease of
control of the device
Model SK TIE4-POT
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
Switch
(L – OFF – R)
3-position switch attached to the device for ease
of control of the device
Model SK TIE4-SWT
(Section 3.2.2 "External technology units
SK TU4-… (module attachment)")
Maintenance switch
(0 – I)
Technology unit attached to the device or
alternatively for wall mounting (wall mounting kit
required) for the safe insulation of the device
from the AC power supply.
Model SK TU4-MSW- …
(Section 3.2.2 "External technology units
SK TU4-… (module attachment)")
Setpoint adjuster
(L – 0 – R/0 – 100 %)
Technology unit attached to the device or
alternatively for wall mounting (wall mounting kit
required) for ease of control of the device using
buttons and potentiometers, including power
supply unit to generate a 24 VDC control power
supply.
Model SK TU4-POT- …
(Section 3.2.2 "External technology units
SK TU4-… (module attachment)")
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NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
20 BU 0200 en-US-4920
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Plug connector
Power connection
(for power input, power output,
motor output)
AC power connector attaching to the device to
establish a detachable connection for supply
lines (e.g. power supply line)
Model SK TIE4-…
(Section 3.2.3.1 "Plug connectors for power
connections")
Control line connection
System connector (M12) attaching to the device
to establish a detachable connection for control
lines
Model SK TIE4-…
(Section 3.2.3.2 "Plug connectors for control
connection")
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Adapter
Adapter cable
Various adapter cables
(Link)
Mounting adapter
Various adapter kits attached the device in
different motor sizes
(Section 2.1.2.1 "Adapters for motor size")
EEPROM memory module
adapter
For data backups and parameterization of the
memory module (external EEPROM) of the
variable frequency drive, independently of the
variable frequency drive
Type SK EPG-3H
(Link)
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Miscellaneous
Internal electronic brake
rectifier
Customer unit installed in the device for direct
actuation of an electromechanical brake
Model SK CU4-MBR- …
(Section 3.2.1 "Internal customer units
SK CU4-… (installation of modules)")
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