Danaher Motion B8961, Operator'S Manual

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Appendix B: EMC Installation
IDC has tested and documented the effectiveness of the Corcom EMI filters (part #:
6EQ8 F7264) but any filter with a similar power and high frequency impedance
characteristics should provide similar results.
The proper installation of the line filter is at least as important as properly sizing it
to the application.The following guidelines should be used:
1. Ground the line filter case to the enclosure cabinet ground.The case of the line
filter is generally conductive and connected to the filter’s g round.Insuring a
good RF connection between the filter and the cabinet usually requires
removing the paint where the filter is mounted to create a large surface area
conduction path.
2. Minimize the AC cable run inside of the cabinet.The filtered side of the AC line
filter can be contaminated by radiated noise from the unfiltered side of the
filter and from other RF sources inside of the cabinet,thus completely negating
the effect of the filtering.The best way to do this is to mount the filter at the
point where the AC power enters the enclosure.
Motor Output Power Cable Shielding
Most of the radiated RF emissions come from the motor power cables.Use shielded
motor cables.The shield needs to be connected at the motor AND the cabinet
ground as close to the drive as possible for best results.Removing the paint around
the bottom drive mounting tab,and using this bolt as the shield termination
generally works very well.To fully comply with emission standards set forth in
EN50081-1 (Residential,commercial and light industrial environments) the motor
power cables also need to be run inside of conductive conduit.The conduit should
make good electrical contact with the motor case ground at the motor end,and
the enclosure ground at the motor end.Please note that local electrical codes may
have further rules and restrictions on high voltage and current cabling.These
installation instructions are intended to supplement,not replace or supersede the
local electrical, fire,and safety codes.
In addition to grounding both ends of the motor and encoder shield,to further
reduce the radiated emissions from the drive, ferrite beads can be installed on the
motor and encoder ca bles before they leave the electrical enclosure (see the
drawing above).IDC has tested and confirmed the effectiveness of the Fair-Rite
model #0443164151.This is a removable “snap-on”style emission suppressor.These
beads are necessary to meet the “residential and light industry”emission
specifications.Other specification levels may or may not need the additional
emission suppression provided by the beads.And in some cases,other measures
may need to be taken.