User's Manual

EMC Directives
4 – 6 D101583 0207 BL ident
Connect the applied shield to the module without interruption.
Use a braided shield and not a metal foil shield.
 Mains and signal filter
Use the mains filter with metal housing.
Connect the filter housing on a wide area and with a low radio
frequency resistance to the switch cabinet earth.
Never attach the filter housing to painted surfaces.
Attach the filter at the switch cabinet entry or in the direction of
the interference source.
Installation in a switch cabinet
Metal housings shield susceptible equipment against magnetic and
electrical fields as well as electromagnetic waves. The better that
the induced interference current can flow, the better that the
interference field will weaken itself. It is therefore essential to ensure
that all housing panels are connected electrically conducting to
each other.
If the switch cabinet panels are insulated from one another, an RF
conductive connection using metal braiding and RF clips or RF
paste (the greater the surface area of the connection the better)
must be possible.
Interference can be avoided by optimum switch cabinet design. The
following generally applies:
 The effects of the interference generally reduce as the distance
between the susceptible equipment and the source of
interference increases.
 An additional reduction in interference can be achieved by
installation of shield panels
 Signal cables should keep a minimum distance of at least 10 cm
from high power cables.
External interference induced through the mains is avoided by the
installation of mains filters. Ensure that the mains filter is correctly
rated and fitted directly at the entry to the switch cabinet.