Jetter JetWeb JX2-CNT1, User Manual

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JX2-CNT1 1.3 Instructions on EMI
Jetter AG 15
1.3 Instructions on EMI
The noise immunity of a system corresponds to the weakest component of the
system. For this reason, correct wiring and shielding of cables is of paramount
importance.
Important!
Measures for increasing immunity to interference:
Attach the JX2-CNT1 module to a DIN rail acc. to EN 50022-35 x 7.5.
Connect the JX2-CNT1 module to the controller or the power supply
module JX2-PS1 via Jetter system bus.
Connect the JX2-CNT1 module to the Jetter system bus by directly
plugging it into a JX2 module (not through a cable).
The system bus can be extended by means of a cable.
Follow the instructions given in Application Note 016 "EMC-Compatible
Installation of the Electric Cabinet" published by Jetter AG.
The following instructions are excerpts from Application Note 016:
On principle, physical separation should be maintained between signal
and power lines. We recommend spacings greater than 20 cm. Cables and
lines should cross each other at an angle of 90°.
Shielded cables must be used for the following lines:
Analog lines, data lines, motor cables coming from inverter drives (servo
output stage, frequency converter), lines between components and
interference suppressor filter, if the suppressor filter has not been placed
at the component directly.
Shield cables at both ends .
Unshielded wire ends of shielded cables should be as short as possible.
The entire shield must , in its entire perimeter, be drawn behind the
isolation, and then be clamped under an earthed strain relief with the
greatest possible surface area .
When male connectors are used:
The shield (impedance shielding) must , in its entire perimeter, be drawn
behind the shielding clamp of the metallized connector housing,
respectively of the EMC gland bushing, its greatest possible surface area
being clamped under a strain relief.