2.8 EMI Filters
All of the electronic equipment (including servo drives) in normal operation, will produce some high frequency or low frequency noise, and
through the conduction or radiation interference peripheral equipment. If you can match the appropriate EMI filter and the correct installation
method, the interference will be reduced to a minimum.
When the servo driver and EMI filter are installed, we can follow the installation and wiring of the contents of the manual, we can be sure that it
can meet the following specifications:
1. EN61000-6-4（2001）
2. EN61800-3 （2004） PDS of category C2
3. EN55011+A2（2007） Class A Group 1
2.8.1 EMI Filter installation caution
In order to ensure that the EMI filter can achieve maximum effect of inhibit the servo drive interference, in addition to the servo drive
according to the contents of the manual installation and wiring, still need to pay attention to the followings:
1) Servo drive and EMI filter must be installed on the same piece of well grounded metal plane.
2) Servo drive and EMI filter, please try to install the servo drive above the EMI filter .
3) All wiring will be as short as possible.
4) Metal shell of servo drive and EMI filter must be reliably connected with the metal ,surface, and the contact area between the two should be
as large as possible.
2.8.2 Selection of motor cable and installation notes
The selection and installation of the motor line is correct or not, it’s related to the EMI filter can play the greatest effect of servo drive
interference suppression.
Please note the followings:
1) The cable with isolation copper mesh (Double isolation layer is preferred).
2) The isolated copper mesh on both ends of motor line to ground in the shortest distance and the maximum contact area.
3) Motor line isolation copper mesh connects metal plane correctly, isolated copper mesh on both sides of motor line should be fixed with
U-shaped metal piping supports and metal plane.
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