Page 1
OPERATING INSTRUCTIONS
NORDAC connect
Getriebebau NORD
GmbH & Co. KG
BU 6200 GB
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NORDAC connect Operating Instructions
1 General
NORDAC connect is a device that will switch ON or OFF one phase sequence in motors with ratings between
0.25 and 3.0 kW. Integrated in the terminal box of the motor, it ensures complete motor protection as well. With
NORDAC connect, no extra components need to be provided in the switch cabinet with which to wire up the
drive or to monitor its working. This is what makes NORDAC connect the perfect switchgear for many a drive
which is operated on an autonomous basis, ensuring both effective control and absolute operational safety.
1.1 Instructions for safety and installation
Three-phase motors with a NORDAC connect motor switch are operational equipment for use in industrial
power plant and are operated at voltages which on contact may cause serious injuries or even death.
CAUTION! DANGER!
WARNING
THESE DEVICES MUST BE EARTHED.
For the device to be operated safely, installation and initial start-up must be performed by qualified
personnel in a workmanlike manner, with all of the directions mentioned in the present Operating
Instructions being followed as specified.
In particular both the generally and locally applicable installation and safety regulations for any work on
power installations (e.g. VDE) and the regulations concerning the professional use of tools and the use of
any equipment for personal protection must be observed
The mains input terminals may be dangerously live even after the motor has stopped (e.g. as a result of an
electronic signal disabling the [RUN] condition, or following a jamming of the drive). The motor being at rest
does not mean that it is also electrically isolated from the mains.
Always use insulated screwdrivers in the terminal areas concerned.
Make sure that the source of input voltage is disconnected before you establish connections to
the unit or change them.
Touching exposed or unconnected terminals may lead to serious injuries or even death!
European EMC Directive
If the instructions of the present manual regarding installation of the NORDAC connect switchgear are duly
followed, the device will meet all of the EMC requirements defined in the applicable directive in accordance with
the EN61800-3 product standard for motor-driven systems.
2 And this is how it works
• The NORDAC connect contains a power switch which, by providing a 24 V DC control signal [RUN], will
cause the permanently applied voltage to be fed to the motor windings.
• At the same time, if there is a mechanical brake, it is lifted automatically via the integrated brake rectifier.
The drive starts to run.
When the control signal is removed, the power supply to the motor windings is cut off as well, and the
mechanical brake takes hold again.
• All the time the drive is in operation the motor temperature is monitored by a thermal relay. In the event of a
temperature fault, the NORDAC connect will automatically switch off the drive and transmit a fault signal to
the master control system ( the [OK] signal changing to low ).
• A reversal of the phase sequence is obtained by way of exchanging two input phases.
2 BU 6200/00 GB
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3 Connection
K
3.1 Power supply
English
BR1
BR2
GND
DC 24 V
TEMP1
TEMP2
O
RUN
Terminal
Clockwise rotation
Connec-
Anti-clockwise rotation
tion
U1 L1 L2
V1 L2 L1
W1 L3 L3
Use 4 mm ring tongues to connect the unit to the mains.
When you install the NORDAC connect, never do anything conflicting with the safety regulations !
3.2 Control terminals
Terminal Function
GND 0 V reference potential
DC 24 V 24 VDC supply voltage
24 V
enable signal
RUN
OK
Maximum connection cross section: ...1.5 mm
DC
high = start , low = stop
24 V
readiness-for-operation acknowledgement signal
DC
high = ready for operation, low = excess temperature
2
Optional: M12 circular connector
If M12 system cables are used (e.g. when the switchgear is to be connected to a field bus subassembly), the
NORDAC connect can be equipped with an optional M12 flush-mounting connector.
The M12 flush-mounting connector can be inserted in any of the four M25 cable entries.
Pin Colour Function
1 brown 24 V DC
3
4
2
1
BU 6200/00 GB 3
2 white RUN
3blue GND
4black OK
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NORDAC connect Operating Instructions
3.3 Thermal protection of the motor
To protect the motor from overheating, the motor winding is continuously monitored by a thermostat connected
to the terminals TEMP1 and TEMP2. Whenever an overload or overtemperature condition occurs, the NORDAC
connect will switch off the drive automatically.
If the enable signal [RUN] is not removed, the drive will start up again on its own when the
motor temperature has sufficiently decreased.
To prevent the drive from restarting automatically, evaluation of the readiness-for-operation acknowledgement
[OK] signal can be assigned to a control device (PLC).
3.4 Three-phase brake motors with a NORDAC connect
Whenever a three-phase brake motor is combined with a NORDAC connect motor switch, the wiring needed to
connect the brake is taken care of at the factory.
The brakes used have got a coil voltage of 180 V DC. They are connected to terminals BR1 and BR2 .
4 Technical data
NORDAC connect
Power terminals
Mains voltage
Mains current 0.5...8.0 A
(kW) 0.25...3.0Motor rating
4-pole three-phase standard
motor
(hp)
Control terminals
Supply voltage
Control input (RUN)
Output (OK)
Overtemperature
3 AC 380 V ... 440 V ±10%, 47 to 63 Hz
1
/3...4
U
19 V...30 V
24V
I
< 50 mA + I
24V
I
< 1A (short-circuit)
24V
OK
U
RUN(AUS)
U
RUN(EIN)
U
OK
U
OK
IOK(max)
0...5 V, I
15..30 V, I
U
(high)
(low)
24V
high-impedance
0...0,68A (short-circuit)
RUN
RUN
OK
< 2 mA
< 20 mA
Type of enclosure: IP55
Ambient temperature: -10oC to +50oC
Getriebebau NORD
GmbH & Co. KG
Postfach 12 62
22934 Bargteheide
Tel.: 04532/401-0 ⋅ Telefax: 04532/401-555
Änderungen vorbehalten
Specification subject to change without prior notice
Printed in Germany
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