User manual

User manual POLARIS Remote 19.1" / Remote 15"
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3.3.1 Interference suppression
Certain basic measures must be taken to ensure freedom from interference when the POLARIS Remote are installed:
■ Interference voltages injected into the unit via power and signal cables and static charges caused
by contact are to be conducted to earth (e.g. grounding screw terminal fixed to the back of the
unit). This earthing point must be connected to the PE conductor by means of the shortest
possible low resistance copper conductor or must be integrated in the equipotential bonding. If
this point is not observed, the measures taken to suppress interference and preclude damage to
the device effectively will be impaired.
■ The installation point should be as far as possible away from fields of electromagnetic
interference. This is especially important if there are frequency converters in the vicinity. Under
certain circumstances it will be advisable to set up partitions to isolate the POLARIS Remote from
interference.
■ If inductive unit are fitted in the vicinity (e.g. contactor, relay or solenoid coils), especially if they
are powered from the same source, protective circuits (e.g. RC elements) must be installed.
■ Power supply and data cables must be laid so as to avoid interference. This can, for example, be
achieved by avoiding laying such cables in close proximity to high current carrying cables.