10-2
Certification for the Drive
650S AC Drive
Requirements for EMC Compliance
Earthing Requirements
IMPORTANT:
Protective earthing always takes precedence over EMC earthing.
Protective Earth (PE) Connections
Note:
In accordance with installations to EN60204, only one protective earth conductor is permitted at each protective earth
terminal contacting point.
Local wiring regulations may require the protective earth connection of the motor to be connected locally, i.e. not as specified
in these instructions. This will not cause shielding problems because of the relatively high RF impedance of the local earth
connection.
EMC Earth Connections
For compliance with EMC requirements, the “0V/signal ground” is to be separately earthed. When a number of units are used
in a system, these terminals should be connected together at a single, local earthing point.
Control and signal cables connections should be made with screeened cables, with the screen connected only at the VSD end.
However, if high frequency noise is still a problem, earth screen at the non VSD end via a 0.1
μ
F capacitor.
Note:
Connect the screen (at the VSD end) to the VSD protective earth point
, and not to the control board terminals.
