User manual

Stand: Februar 2011 Z 385 engl
3.3. EMC measures
Make sure that the controllers are suitable for operating in the required EMC
environment.
EPH Elektronik supplies special mains filters and enclosures that are designed for the
specific controller and which are able to provide not only the best possible protection
against interference, but also the best damping, low noise emissions, simple
mounting and installation, as well as the necessary electrical safety.
The unit is only effectively protected against EMC when it is equipped with an EMC
suitable enclosure and when the recommended mains filter has been correctly
installed with shielded motor and control lines between the higher level controls,
regulation and motor.
The shield needs to have a large surface and be connected to earth via the shortest
possible route. In case of versions with an enclosure the shield needs to be
connected to it by means of an appropriate metal screw.
• Eliminate any lacquer and insulation from the individual mounting
locations.
• Use metallic connections with the largest possible surface.
• Anodised or chromated surfaces have a high HF-impedance and need to be
polished.
• Use the shortest possible cables to the control unit and maintain them
separate from other mains lines.
• Use only shielded cables (industry cables with shielding wire mesh sheath).
• Verify the correct connection of the circuit breaker (PE). Connect the mains
filter securely to the earth potential!