User guide

CE Requirements
172
890 USE 108 00 August 2001
Installation
Requirements
for Certain
Compact Family
Products
Follow these requirements for installations that must comply with the CE marking:
Install equipment following approved EMC practices, i.e. protective earthing and
functional earthing, connections with good conductivity, and grounding cables of
sufficient cross section
Avoid all sources of electrical disturbance in proximity of the equipment,
encapsulation with metallic walls
Use manufacturer approved cabling
Use EMC compliant grounding of cable shielding (proper mechanical connection,
connection surface, clamps)
Separate data and signal cable routing, which emit disturbances (e.g. power
cables with switching transients)
Use the prescribed suppression filters and their competent installation
To improve EMC stability on the modules it is recommended that the U (voltage) and
M (common) connections used here have a capacitive discharge that is as short as
possible from the terminal towards the functional earth. This is the purpose of the
capacitive discharge terminal (GND 001), refer to the following figure. In an
environment that has a high interference level, an increase of the capacity on the C1
from 2.2 nF to 22 nF is recommended.