Emc Requirements - Pilz PSEN enc sincos/HTL Operating Manual

Installation / Preparation for Commissioning

6.2 EMC requirements

Operating Manual PSEN enc sincos/HTL
1005022-EN-01
WARNING!
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.
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