Jetter JC-120MC, Руководство пользователя

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16 Jetter AG
1 Safety instructions
Instructions on EMI
The noise immunity of a system is determined by the weakest component of
the system. For this reason, correct wiring and shielding of cables is of
paramount importance.
Measures for increasing EMI in electric plants:
 Attach the JC-120MC to a DIN rail to EN 60715 having got 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

Also refer to Application Note 016 EMC-compatible installation of electric
cabinets by Jetter AG.
The following instructions are excerpts from Application Note 016:

Physically separate signal and power lines. Jetter AG recommend
spacing greater than 20 cm. Cables and lines should cross each other at
an angle of 90°.
 The following line cables must be shielded:
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 the earthed strain relief
with the
greatest possible surface area.
When male connectors are used:
 Draw the shield, in its entire perimeter, under the shielding clamp of the
metallized connector housing (impedance shielding), respectively of the
EMC gland bushing, its greatest possible surface area being clamped
under a strain relief.
 Only use metallized connectors, e.g. Sub-D with metallized housing. Make
sure that the strain relief is directly connected with the housing here as
well.
Noise immunity of a
system
Measures