Danaher Motion
05/2008
Regulatory Information
S200-CNS Product Manual
67
Avoid Cross talk
CAUTION
To avoid the risk of cross talk, keep the motor and feedback cables away from
sensitive signal cables (i.e., telephone and intercommunication lines). Shield all
cables used with the S200 drives with the shields connected to PE.
EMC testing was performed using a single drive with standard wiring. When a machine incorporates
several drives or is designed for use in an environment requiring very low emissions, additional
steps may be necessary to reduce the overall machine emissions and/or susceptibility. High
frequency grounding of cable shields may help reduce radiated and conducted emissions as well as
protect against susceptibility to external and self-generated noise.
High Frequency Grounding of Cable Shields
NOTE
When a cable with a separate inner foil shield and outer braided shield is used, EMC
performance may be improved by connecting the foil shield to the PE location on the
connector and removing about 10 mm (0.5 in) of the outer cable jacket close to the drive
[within 0.6 m (2 ft) of the drive] to expose the braided shield and clamping the outer
braided shield to the ground plane with a 360°-type clamp.
If a ground plane is available at the motor end of these cables, similar use of a
conductive clamp at that end to connect the shield to the ground plane may help as well.
Clamping the cable shields to PE typically reduces the level of emissions and increases
the level of immunity to interference.
Example of 360° clamping of cable shields
12.13 R
EGEN
R
ESISTOR
Regen Wiring (AC drives)
For complete instructions pertaining to an external regen resistor with an AC input drive, refer to the
System Wiring Diagrams. In addition to the information in that section, users installing drives for use
in a CE installation should use an appropriately-grounded, shielded regen cable to reduce overall
system emissions.
Accessible Regen Cables
CAUTION
When using an external regen resistor, if regen cabling is accessible during normal
machine operation, the cable should be a shielded cable rated at 450 VDC with the
shield connected to PE.
High Frequency Grounding of Regen Cable Shield
NOTE
When using a regen resistor in a CE installation, the cable should be appropriately
rated and have a braided shield connected to PE for safety, and clamped to the ground
plane with a 360° clamp for EMC purposes
12.14 A
DDITIONAL
EMC
I
NFORMATION
S
OURCES
Additional information on EMC performance and noise reduction techniques can be found on the
Danaher Motion website (www.DanaherMotion.com):
Kollmorgen Application Note
EMI Noise Checklist
Pacific Scientific Application Note 106 -
Reducing Motor Drive Line Noise
Pacific Scientific Application Note 107 -
Reducing Motor Drive Radiated Emissions