Appendix G – Regulatory Information 05/2008
Danaher
Motion
138
S200-VTS Product Manual
Avoid Crosstalk
CAUTION
To avoid the risk of crosstalk, 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
G.11 Regen
Resistor
Regen Wiring (AC drives)
For complete instructions pertaining to an external regen resistor with an AC input drive, refer to
Base AC Drive Wiring. 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
G.12
Additional EMC Information Sources
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