Improving The Noise Immunity - Jetter JX3-BN-EC User Manual

Jetter AG

6.1 Improving the noise immunity

INFO
DIN rail
Application Note
016
JX3-BN-EC User Manual
The noise immunity of a system is determined by its weakest component. Correct
connections, lines and shielding are key factors. Follow the procedures described
in this chapter.
Further information
You can find further information on the immunity of a plant in the Application
Note 016 EMC-Compatible Installation of Electric Cabinets on our homepage.
■ Mount the JX3-BN-EC on a DIN rail to DIN EN 60715 with the dimensions
35 x 7.5 mm.
■ The DIN rail must be electrically conducting and grounded by either of the two
ways:
■ Directly:
■ Via rear panel of the electric cabinet
Follow the instructions given in Application Note 016 EMC-Compatible Installation
of the Electric Cabinet.
The following instructions are excerpts from Application Note 016:
■ Separate signal and power lines physically. Jetter AG recommends a dis-
tance greater than 20 cm. Cables and lines should cross each other at an an-
gle of 90°.
■ Shield the following lines:
■ Analog lines
■ Data lines
■ Motor cables of inverter drives (servo amplifiers, frequency converters)
■ Lines between components and interference suppression filter if the filter
is not placed directly on the component.
■ Connect the shield on both sides.
■ Keep unshielded wire ends of shielded cables as short as possible.
■ Pull back the entire perimeter of the shield behind the insulation. Then clamp
it with the greatest possible surface area under a grounded strain relief.
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