Bartec 17-72V5 Series, Руководство пользователя

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Technical Data
POLARIS Remote
POLARIS Remote KVM Analog
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Technical data subject to change without notice.
07/2018
The plug casing of some controllers is not always well connected to earth. In such cases it
may prove advantageous to insulate the shielding from the sub-D plug of the controller and
connect it directly to the protective earth conductor by means of a cable that should be kept
as short as possible (0.75 mm² …1.5 mm²).
6.5.7 Examples of Shielding Connections
ATTENTION
POLARIS can be demaged in case of potential differences!
Avoid potential difference.
Double-sided shield connection on the connecting cables:
Illustration 14: Example of double-sided shield connection
Generally, connection of the shielding at both ends results in optimum damping of all
interference frequencies. This method is to be recommended when there is good
equipotential bonding between the individual units. In such cases it is possible to make use
of the controller’s voltage supply cable even if this is not electrically isolated.
Single-sided shield connection on the connecting cables
Illustration 15: Example of single-sided shield connection
Connection of the shielding at one end only is recommended when there is inadequate
equipotential bonding, or none at all. In such cases an electrically isolated power supply
unit must be used. Before the equipment goes into service the directions from the controller
manufacturer regarding proper assembly and operation must be read carefully. They should
then be applied taking full account of the recommendations we make here.