If applied in the rst environment, the controller may generate radio interference. Besides the
CE compliance described in this chapter, users must take measures to avoid such interference,
if necessary.
9.2.2 Requirements on Satisfying the EMC Directive
1. The controller requires an external EMC lter. The recommended lter models are listed
in Table 9-1. The cable connecting the lter and the controller should be as short as
possible and be not longer than 30 cm. Furthermore, install the lter and the controller
on the same metal plate, and ensure that the grounding terminal of the controller and
the grounding point of the lter are in good contact with the metal plate.
2. Select the motor and the control cable according to the description of the cable in
section 9.4.
3. Install the controller and arrange the cables according to the cabling and grounding in
section 9.4.
4. Install an AC reactor to restrict the current harmonics. For the recommended models,
see Table 9-2.
9.3 Selection of Peripheral EMC Devices
9.3.1 Installation of EMC Input Filter on Power Input Side
An EMC lter installed between the controller and the power supply can not only restrict the
interference of electromagnetic noise in the surrounding environment on the controller, but
also prevents the interference from the controller on the surrounding equipment.
The NICE1000
new
controller satises the requirements of category C2 only with an EMC lter
installed on the power input side. The installation precautions are as follows:
•
Strictly comply with the ratings when using the EMC lter. The EMC lter is category I
electric apparatus, and therefore, the metal housing ground of the lter should be in good
contact with the metal ground of the installation cabinet on a large area, and requires
good conductive continuity. Otherwise, it will result in electric shock or poor EMC effect.
•
The grounds of the EMC lter and the PE conductor of the controller must be tied to the
same common ground. Otherwise, the EMC effect will be affected seriously.
•
The EMC lter should be installed as closely as possible to the power input side of the
controller.
The following table lists the recommended manufacturers and models of EMC lters for the
NICE1000
new
controller. Select a proper one based on actual requirements.
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