NORD BU0100 User Manual
Manual
NORDAC SK 1xxE Series
SK 140E Æ Electronic motor starter
SK 150E Æ Electronic soft starter
SK 160E Æ Electronic reversing starter
BU 0100 GB
GetriebebauNORD
GmbH & Co. KG
Table of content
1 General description ............................................................................................................................ 3
1.1 Delivery ......................................................................................................................................................... 4
1.2 European EMV (EMC) guideline. ................................................................................................................... 4
2 Electronic Motor Starter SK 140E ................................................................................................... 5
2.1 Principle of function ...................................................................................................................................... 5
2.2 Device design ................................................................................................................................................ 6
2.2.1 SK 140E-1-O
2.2.2 SK 140E-1-BSG2
2.3 Electrical connection ..................................................................................................................................... 7
2.4 Display and settings ...................................................................................................................................... 8
2.4.1 Status LEDs
2.4.2 Slide switch for automatic operation
...................................................................................................................................... 6
................................................................................................................................ 6
....................................................................................................................................... 8
................................................................................................. 8
3 Electronic Soft Starter SK 150E ....................................................................................................... 9
3.1 Principle of function ...................................................................................................................................... 9
3.2 Device design .............................................................................................................................................. 10
3.2.1 SK 150E-1-O-3D-T125
3.2.2 SK 150E-1-BSG2-3D-T125
3.3 Electrical connection ................................................................................................................................... 11
3.4 Display and settings .................................................................................................................................... 12
3.4.1 Status LEDs
..................................................................................................................................... 12
3.4.2 Setting the potentiometers and dip switches
3.4.3 Slide switch for automatic operation
..................................................................................................................... 10
............................................................................................................... 10
.................................................................................. 13
............................................................................................... 17
4 Electronic Reversing Starter SK 160E .......................................................................................... 18
4.1 Principle of function .................................................................................................................................... 18
4.2 Device design .............................................................................................................................................. 19
4.2.1 SK 160E-1-O(-C)-3D-T125
4.2.2 SK 160E-1-BSG2(-C)-3D-T125
4.2.3 SK 160E-1-x(-C)-MS
4.2.4 SK 160E-AS1-x(-C)-MS
4.3 Electrical connection ................................................................................................................................... 21
4.4 Display and settings .................................................................................................................................... 22
4.4.1 Status LEDs
..................................................................................................................................... 22
4.4.2 Rotary dip code switches for locking time
4.4.3 Slide switch for automatic operation
............................................................................................................... 20
......................................................................................................... 20
........................................................................................................................ 20
.................................................................................................................... 20
....................................................................................... 23
............................................................................................... 23
5 Options / Accessories SK 1xxE ...................................................................................................... 24
5.1 SK 1xxE on motor with electromechanical brake ....................................................................................... 24
5.1.1 SK 1xxE with integrated brake rectifier
5.1.2 SK 1xxE with separately installed brake rectifier
5.2 Wall-mounting kit ....................................................................................................................................... 25
5.3 System plug for power input or motor output ............................................................................................ 26
5.4 Signal pl u g M1 2 f o r c o nt r o l s ig n a l s .............................................................................................................. 27
5.5 AS interface bus connection ....................................................................................................................... 28
5.5.1 AS interface as additional assembly
5.5.2 AS interface as additional optional assembly
........................................................................................... 24
............................................................................. 24
................................................................................................ 29
.................................................................................. 29
6 Technical data / Dimensions ......................................................................................................... 30
7 Maintenance and service notes ..................................................................................................... 32
8 Index ................................................................................................................................................... 33
9 Agencies and branch offices .......................................................................................................... 34
2 BU 0100 GB
NORDAC SK 1xxE
1 General description
The product series NORDAC SK 1xxE constitutes a motor or wall-mounted electronic component that can be
used to handle simple drive or switching functions. The following types are part of this product series:
SK 140E Electronic motor starter
(Startup in one direction)
SK 150E Electronic soft starter
(Soft startup and run-down with adjustment of time and torque)
SK 160E Electronic reversing starter
(Startup possible in both directions)
The electronics of this motor starter series are integrated into the motor's terminal box. They can be directly
mounted on top of the motor (motor-integrated) or on the wall (proximity of motor). Each starter possesses an
assessment of a thermal protector (temperature probe or control) and an optional brake rectifier. A red or a
green LED visable from the outside through a transparent screw plug, indicating the devices status.
The NORDAC SK 140E enables a switching operation of a three-phase asynchronous motor in one direction.
This allows for cost-efficient switching directly at the drive.
The NORDAC SK 150E enables a soft start-up and run-down of three-phase asynchronous motors. This
allows for starting and stopping of the drive smoothly. With the soft starter, both torque and times can be set
separately for the startup and rundown of a drive.
The NORDAC SK 160E enables the switching operation of a three-phase asynchronous motor in both
directions. 2 rotary dip code switches are used to set a locking time to protect the installation against damage
caused by too quick a reversal.
The entire power range of the motor starter series is covered by one component size. The power range of the SK
140E reaches from 0.12 kW to 3.0 kW, that of the SK 150E and SK 160E cover a range from 0.12 to 4.0 kW.
Motor sizes 80 to 112 (with the SK 140E up to size 100) allow for direct mounting; sizes 63 to 71 require a simple
adapter plate (Mat. No. 11015410).
The number of poles of a motor is immaterial; the only determining variable for the motor starter are the power
consumption and the motor size.
The control electronics require 24 VDC (15 ...30 VDC, ≈ 50 mA) supply voltage, e.g., from a PLC or another power
supply.
Optionally, each SK 1xxE is available with an integrated fast acting rectifier (BSG2). The electromechanical brake
can then be directly connected to the device; no additional supply voltage is required for the brake.
A bus access is possible for all electronic starters of the SK 1xxE series by means of an optional AS interface
(AS1).
With the option (MS) there is the possibility of realising the power input or motor output of the starter by means of a
system plug of the Harting HAN 10E type.
All devices of the SK150E/160E series in the versions with and without integrated brake rectifiers fulfil the
requirements for explosion protection (ATEX) in Zone 22 according to the currently valid standards according
to EN 50281 (Guideline 94/9/EG). However, this only applies if no further add-on options (AS interface, plug
connectors) are included.
The most current information and documentation can be downloaded free of charge from the homepage of
Getriebebau NORD at
BU 0100 GB Technical Modifications Reserved 3
www.nord.com.
NORDAC SK 1xxE
SAFETY NOTES
Safe operation of the device requires that it is mounted and made operational by qualified personnel
according to the instructions provided in this manual.
Qualified personnel paying special attention to the safety and warning notes may only make adjustments.
Special attention must be paid to the general and regional installation and safety regulations for work on
high-voltage installations (e.g., EN, VDE) as well as to the directions for the proper use of tools and the
utilization of personal protection devices.
The motor connection terminals may carry dangerous voltage even at standstill of the motor (e.g., through
electronic lock [RUN] or blocked drive). A motor standstill is not equivalent to electrical disconnection from
system power.
ATTENTION: Touching open or exposed terminals can lead to serious injuries or death! Always use
insulated screw drivers on these terminal panels. Make sure that the input voltage source is without voltage
before you make connections to the unit or prior to altering them.
ATTENTION: The drive may start running immediately after applying system voltage.
1.1 Delivery
Inspect the device immediately after receipt/unpacking for transport damages such as deformed or loose parts.
In case of damage, contact the freight carrier without delay; initiate a careful fact-finding measure.
Important! This also applies if the packaging is not damaged.
1.2 European EMV (EMC) guideline.
If a NORDAC SK 1xxE is installed according to the recommendations of this manual, it will
meet all requirements of the EMC guideline being in conformity with the EMC product
standard EN60947-4-2 for low voltage switching devices, semiconductor control devices and
starters for alternating current..
4 Technical modifications observed BU 0100 GB
NORDAC SK 140E
2 Electronic Motor Starter SK 140E
2.1 Principle of function
The SK 140E enables a simple motor startup in one
direction. The switching process takes place through 2
wear-free power switches. The activation or release of the
drive occurs through a 24 VDC control signal. The
integrated temperature monitoring can be done via a
temperature probe or control. A design with a rectifier integrated or separately installed in the terminal box – is
available for the control of a brake.
Features:
• The SK 140E contains an electronic power switch that switches the supply voltage to the motor
windings via a 24 VDC control signal [RUN].
• At the same time, the electromechanical brake (if present) is released through the integrated brake
rectifier (option).
SK 140E
• If the control signal is canceled, the supply of the motor windings is interrupted and the brake (if
present) is applied again.
• During the entire operation, the motor can be thermally monitored through temperature probes acting
as overload cutout. There are 2 monitoring modes that can be selected by means of a slide switch.
During automatic operation (slide switch set to [ON], the SK 140E switches the motor off automatically
and reports the excess temperature by removing the OK message (fault signal, signal [OK] changes to
low). If the automatic operation has not been selected (slide switch set to [OFF]), then only the OK
message is removed and the drive continues to run. The inputs must be connected with a jumper if
temperature monitoring is not desired.
• In automatic operation, the motor does not automatically start even after cooling. To restart, the
control signal [RUN] must first be switched off and then on again. Alternatively, the internal slide switch
can be switched [OFF] and [ON] again. Caution, the drive starts immediately!
• The basic direction is predetermined by the system input phases. This can be altered by exchanging
2 phases. For the correct phase sequence, [RUN] corresponds to a clockwise motor direction.
• The current status of the SK 140E is shown through 2 LEDs. These are visible from the outside
through a transparent screw plug.
BU 0100 GB Technical Modifications Reserved 5
NORDAC SK 140E
2.2 Device design
System Input
[L1] [L2] [L3]
PE
Motor
Connection
Brake rectifier
Bridge [L]
Brake rectifier
Coil
Control unit [GND]
[+24 VDC]
[OK]
[RUN]
Status LEDs
Transparent screw
plug
see chapter 2.4.1
Slide switch
Automatic = [ON]
see chapter 2.4.2
Motor temperature
probe
or jumper
2.2.1 SK 140E-1-O
The SK 140E-1-O (Mat. No. 275101400) is a motor starter without permanently integrated rectifier. However, it
is possible to install any rectifier by Getriebebau NORD. This can be utilized in case of retrofitting or at system
voltages of < 380 V. Spacer bolts are used for the assembly of the rectifiers. (Æ See also chapter 5.1 )
2.2.2 SK 140E-1-BSG2
The design with integrated fast acting brake rectifier has the designation SK 140E-1-BSG2 (Mat. No.
275101405). With this device design, a fast acting brake rectifier has been added to the basic function to
directly control a brake mounted to the motor. Consequently, the brake voltage supplied equals supply voltage
x 0.45. The jumper [L] can be used to affect a gradual switch-off by shorting the integrated DC switch. (Æ See
also chapter 5.1 )
6 Technical modifications observed BU 0100 GB
NORDAC SK 140E
2.3 Electrical connection
Power cable: The system connection shall be performed with a cable of sufficient cross-section (max.
Control unit: 4-pole plug with screw terminals 1.5 mm
4 mm
2
)
2
(electrically separated from the system potential)
PTC resistor/brake: 3 x 2-pole screw terminals with 1.5 mm
2
(on system potential)
Cable entry: The following are available: 1 x M25 and 1 x M12 and 1 x M16. If applicable, 1 x M12 may
already be reserved by the brake connection. Other screw connections are available, but
cannot be freely allocated.
Principle circuit diagram:
L3
L2
L1
GND
+24V DC
RUN
OK
2x
L
L
OF F
ON
1
Motor terminals
Motorklemmen
Bridge for gradual switch-off
Brücke für langsames Abschalten
Terminal Function Data
L1, L2, L3 System connection 4mm2, (200) 380 ...480V, 50...60Hz
PE Housing ground 4 mm2
[L] Bridge L 1.5 mm2
[BR-] Brake coil 1,5mm2, (105) 180V DC … 205V DC, max. 0,5A
Power unit
(System potential)
[BR+] Brake coil 1,5mm2, (105) 180V DC … 205V DC, max. 0,5A
[38] Temp1 PTC resistor 1.5 mm2
[39] Temp2 PTC resistor 1.5 mm2
[46] GND Reference potential 1.5 mm2, 0 V
Bremsspule
Brake coil
Kaltleiter oder Temperaturwächter
PTC resistor or temperature control
[45] +24 VDC Supply voltage 24 V 1.5 mm2, 15...30 V, 50 mA
[22] RUN Release signal 1.5 mm2, 15...30 V, ca. 2 mA
arated)
Control unit
(electricallysep
[B1] OK Feedback, operational 1.5 mm2, 15...30 V, max. 50 mA
BU 0100 GB Technical Modifications Reserved 7
NORDAC SK 140E
2.4 Display and settings
The following controls are available for the SK 140E:
Transparent screw plug
To permit viewing of status
LEDs from outside
Status LEDs
(red / green)
Slide switch
(Automatic ON/OFF
2.4.1 Status LEDs
These LEDs are visible through a lateral transparent screw plug.
red LED: OFF no fault present
green LED: Blinking briefly Long pause Operational (Standby),
System voltage and temperature are OK
Permanently on --- Electronic switch is active (ON, motor turns)
red LED: ON a fault is present
green LED: Blinking 1 x Pause [RUN] was already active before applying the 24 VDC
Blinking 2 x Pause Automatic feature is OFF and the system voltage is
absent or the motor temperature is too high
Blinking 3 x Pause Automatic feature is ON and the system voltage is absent
or the motor temperature is too high
)
2.4.2 Slide switch for automatic operation
The slide switch is used to switch the automatic operation on or off. This refers to the characteristics of
switching on again after the motor starter has cut off because of excess motor temperature.
[ON]
Switching off:
automatically switched off by SK 140E.
Switching on again:
[OFF]
Switching off:
not
Switching on again:
present. The motor would start up even in case of excess temperature!
8 Technical modifications observed BU 0100 GB
OK message (signal OK at low) is removed in case of excess temperature. The motor is
The drive will not start automatically if excess temperature is no longer present. The
control signal [RUN] must first be switched off and then on again or, alternatively, the
slide switch is pushed to [OFF] and again to [ON]. Attention: The drive starts immediately!
OK message (signal OK at low) is removed in case of excess temperature. The motor is
switched off by SK 140E.
The OK message is switched high again when the excess temperature is no longer
NORDAC SK 150E
3 Electronic Soft Starter SK 150E
3.1 Principle of function
The SK 150E allows a soft start-up and run-down of a
three-phase asynchronous motor by a gradual rise or
reduction of the torque to be defined. A smooth start-up is
thereby achieved, preventing damage to the drive
elements by a suddenly applied torque. A 2-phase control
process realizes the drive properties. The selection or
release of the drive occurs through a 24 VDC control
signal. Depending on the operating mode chosen, the
start-up and braking torque as well as the associated time
can be adjusted with potentiometers. 4 slide switches
define the operating mode. The integrated temperature
can be monitored via a temperature probe or control.
For the activation of a brake, a design with a
rectifier - integrated or separately installed in the terminal
box – is available.
SK 150E
Features:
o A 24 V voltage supplies the control electronics externally. The control logic is potential-separated
from the system voltage.
o With the release of the drive via a 24 V control signal, the motor is supplied with voltage through a
phase control process. If an integrated brake rectifier is included, then it is connected to the system
voltage through electronic power switches and the electromechanical brake is thereby released.
o During the entire operation, the motor can be thermally monitored through temperature probes (PTC
resistor or temperature control) thereby acting like an overload cut-out. There are 2 monitoring
modes that can be selected by a slide switch. During automatic operation (slide switch set to [ON]),
the SK 150E switches the motor off automatically and reports the excess temperature by removing the
OK message (fault signal, signal [OK] changes to low). If the automatic operation has not been
selected (slide switch set to [OFF]), then only the OK message is removed and the drive continues to
run. The inputs must be connected with a jumper if temperature monitoring is not desired.
With automatic operation, the motor does not automatically start even after cooling. To restart, the
control signal [RUN-RIGHT] must first be switched off and then on again. Alternatively, the internal
slide switch can be switched [OFF] and [ON] again. Caution, the drive starts immediately!
o The basic direction is predetermined by the system input phases. This can be altered by exchanging
2 phases on the motor terminal board. With the correct phase sequence (U1, V1, W1), [RUN]
corresponds to a right motor direction.
o The current status of the SK 150E is shown through 2 LEDs. These are visible from the outside
through a transparent screw plug.
o Series SK 150E in the versions SK 150E-1-0 and SK 150E-1-BSG2 fulfils the requirements for
explosion protection (ATEX) in Zone 22 according to the currently valid standards according to EN
50281 (guideline 94/9/EG).
BU 0100 GB Technical Modifications Reserved 9
NORDAC SK 150E
3.2 Device design
System input
[L1] [L2] [L3]
Brake rectifier
Coil
Brake rectifier
Bridge [L]
Motor temperature probe
or jumper
Motor terminal
board
PE
Control unit
[GND]
[+24 VDC]
[OK]
[RUN-RIGHT]
Status LEDs
Transparent
screw plug
see chapter 3.4.1
3.2.1 SK 150E-1-O-3D-T125
Slide switch
Automatic = [ON]
see chapter 3.4.3
Potentiometer
[P1 - P4]
see chapter 3.4.2
Dip switch
[1 - 4]
see chapter 3.4.2
The SK 150E-1-0 (Mat. No. 275101500) is a soft starter without permanently integrated rectifier. However, it is
possible to install a rectifier by Getriebebau NORD. This can be utilized in case of retrofitting or at system
voltages of < 380 V. Spacer bolts are used for the assembly of the rectifiers. (Æ See also chapter 5.1 )
3.2.2 SK 150E-1-BSG2-3D-T125
The design with integrated fast acting brake rectifier has the designation SK 150E-1-BSG2 (Mat. No.
275101505). With this device design, a fast acting brake rectifier has been added to the basic function to
directly control a brake mounted to the motor. Consequently, the brake voltage supplied equals supply voltage
x 0.45. The jumper [L] can be used to affect a gradual switch off by shorting the integrated DC switch. (Æ See
also chapter 5.1 )
10 Technical modifications observed BU 0100 GB
NORDAC SK 150E
3.3 Electrical connection
Power cable: The system connection shall be performed with a cable of sufficient cross-section (max.
Control unit: 4-pole plug with screw terminals 1.5 mm
4 mm
2
).
2
(electrically separated from the system
potential)
PTC resistor/brake: 3 x 2-pole screw terminals with 1.5 mm
2
(on system potential)
Cable entry: The following are available: 1 x M25 and 1 x M16 and 1 x M12. The 1 x M12 screw plug
may already be reserved by the brake connection and the M16 by the optional M12 plug.
Principle circuit diagram:
Power unit
(System potential)
Motor terminals
PTC resistor or
temperature control
PTC resistor or temperature control
Bridge for gradual
switch-off
Brake coil
Terminal Function Data
L1, L2, L3 System connection 4 mm2, (200) 380...480 V, 50...60 Hz
PE Housing ground 4 mm2
[L] Bridge L 1.5 mm2
[BR-] Brake coil 1.5mm2, (105) 180V DC … 205V DC, max. 0,5A
[BR+] Brake coil 1.5mm2, (105) 180V DC … 205V DC, max. 0,5A
[38] Temp1 Temperature probe 1.5 mm2
[39] Temp2 Temperature probe 1.5 mm2
[46] GND Reference potential 1.5 mm2, 0 V
[45] +24 VDC Supply voltage 24 V 1.5 mm2, 15...30 V, 50 mA
[B1] OK Feedback, operational 1.5 mm2, 15...30 V, max. 50 mA
separated)
(electrically
Control unit
[22] RUN-R Release signal - right 1.5 mm2, 15...30 V, ca. 2 mA
BU 0100 GB Technical Modifications Reserved 11
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