Harmonic Drive SC-610 Series, Operation Manual

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Page A2 Operations Manual SC-610
Harmonic Drive AG 900105 11/2005
APPENDIX A
EMC Installation Instructions
To ensure electromagnetic compatibility (EMC) at hostile environment inside the cabinet following
instructions are to be observed for construction. The implementation of following provisions enables the
reduction of interference down to required levels.
For the Drives technology following key points are to be considered:
- Grounding
- Screening
- Filtering
Furthermore the relevant chapters of the Installation manual for the controllers have to be observed.
For installation of the drives system the starting point is the installation into a cabinet.
For construction of a cabinet the following installation instructions have to be considered:
A) All metal conducting parts of a cabinet should be arealy conducted to the back plane.
Eventually the connections should be placed with an earthing strap at a central grounding
point .1)
B) There should be a spatial separation between power wiring (motor and power cable) and
control wiring. (Avoid interaction space)
C) The screen connection of the signal and power cables should be arealy conducted to the
screen rails or clamps. The screen rails or clamps should be well conducted to the cabinet.
D) The cable to the regeneration resistor has to be screened. The screen connection should be
on both sides.
E) The location of the mains filter has to be situated close to the drive.
F) Cables running inside the cabinet should be placed as close as possible to conducting metal,
cabinet walls and plates. It is advised to terminate unused wires to chassis ground. 1)
G) In case of bad potential balance between the screen connections a compensating lead with at
least 10mm² has to be provided additionly to reduce the screen current.
1) Grounding in general describes all metal parts which can be connected to a protective
conductor, e.g. housing of cabinet, motor housing, fundament grounder.