Table of Contents
Advertisement
General considerations for EMC-conforming assembly and
construction
Electric and electronical devices have to work correctly on site. This is also valid when electro-magnetic
influences affect them in defined and/or expected strength. The devices themselves must not emit
electro-magnetic noises.
Advant Controller components are developed and constructed so that they have a very high noise
immunity. When the wiring and earthing instructions under "System data and system configuration" are
met, an error-free operation is given.
However, there are applications where high electro-magnetic noises must be taken into due
consideration already during the planning phase: e.g. when frequency converters, compressors, small-
power pumps (high inductance) or mediumvoltage switchgear are mounted nearby. An EMC-compatible
earthing concept will also guarantee an error-free operation here.
General principles
There are three important principles to be especially considered:
•
Keep all connections as short as possible (in particular the earthing conductors)
•
Use large conductor cross sections (in particular for the earthing conductors)
•
Create low-impedance, i.e. good and large-sized contacts (in particular for the earthing conductors)
In particular:
•
vibration-resistant connections
•
clean metallic contact areas (remove paint, clean surfaces)
•
if possible, do not use aluminium parts (they oxidize)
•
solid plug and screw-type connections
•
earth cable shields with clips on a well-grounded metallic surface
•
do not use sheath wires
•
do not use toothed lock washers under screw connections
No!
bad contact
Make a connection between the DIN rails and PE (Protective Earth). For this, use an earthing wire with a
minimum conductor cross section of 10 mm². The wire is connected to the DIN rail with an M6 screw
according to the drawing above. A large-area contact of the DIN rail with the metallic mounting plate
improves the EMC behaviour significantly, as the disturbances can be discharged more effective.
Cable routing
•
Route cables meeting the standards.
•
Sort the cables into cable groups (power current cables, power supply cables, signal cables and data
cables)
•
Rout signal cables and data cables separately from the power cables, i.e. in separate cable ducts or
cable bundles. The distance should be 20 cm or greater.
•
Lay signal and data cables close to earthed surfaces.
____________________________________________________________________________________________________________
V2
AC500 Hardware
Yes!
good contact
1-54
System data
AC500 / Issued: 05.2007
Advertisement
Table of Contents
