Printed in the Federal Republic of Germany
TR-Electronic GmbH 2016, All Rights Reserved
10/23/2019
TR - ECE - BA - GB - 0120 - 13
Page 27 of 40
6 Installation / Preparation for Commissioning
6.1 EMC requirements
Deactivation of the safety function due to radiated or conducted
interference sources!
•
Radiated interference sources due to radiophones, lightning strikes in
networks, mobile phones and emissions from individual devices can cause
malfunctions in the measuring system.
•
Conducted interference sources in particular, such as frequency-controlled
drives (system perturbations), have a negative effect on the function of the
measuring system.
The 24 V power supplies used must fulfil the requirements according to
IEC 60364-4-41 SELV/PELV.
The shielding effect of cables must also be guaranteed after
installation (bending radii!) and after connector changes. In cases of
doubt, use more flexible and more reliable cables.
A 5-wire cable with a PE-conductor isolated from the N-conductor (so-
called TN network) is recommended for the drive/motor cabling. This
will largely prevent equipotential bonding currents and the
development of interference.
A shielded and stranded data cable must be used to ensure high
electromagnetic interference stability of the system. The shielding
should be connected with low resistance to protective ground using
large shield clips
at both ends
. The shielding should be grounded
in
the switch cabinet only
if the machine ground is heavily
contaminated with interference towards the switch cabinet ground.
Equipotential bonding measures must be provided for the complete
processing chain of the system. Compensating currents due to
potential differences across the shield to the measuring system must
be avoided in particular.
Power and signal cables must be laid separately. During installation
observe the national safety and installation guidelines for data and
energy cables.
Observe the manufacturer's instructions for the installation of
converters and for shielding power cables between frequency
converter and motor.
Ensure adequate dimensioning of the energy supply.
Separation or delimitation of the measuring system from potential
jammers.
Provide the use of filters.
Observe requirements for external and internal lightning protection.
To ensure safe and fault-free operation, the pertinent standards and
directives must be observed. In particular, the applicable EMC directive
and the shielding and grounding directives must be observed!
Upon completion of installation, a visual inspection with report should
be carried out.
