User`s manual

CHAPTER 2.0 Safety & EMC Instructions 2-15
CDS7324 (FORMERLY LSF-0819)
Rev. A INSTALLATION & USER’S MANUAL
EMC filter can produce high leakage currents to ground (Protective Earth). The current levels associated with
individual filters are detailed in the associated filter datasheet.
2.3.3 EMC requirements for cables
Avoid close parallel routing of signal cables and power cables. Always use the minimum length of cable
necessary and install all cables in a fixed routing.
Data signal cables, motor power and resolver/signal cables, regen resistor cables and power input cables shall
have segregated routings. Where cable routings must intersect, it is recommended that they intersect at an angle
of 90 degrees, to minimise EMC noise coupling.
Where signal and power cables must run in parallel it is recommended that these cables are separated by at least
20 cm. Where possible cables shall be routed in earthed shielded cable ducting, to minimise electromagnetic
noise coupling.
Use shielded cable to connect the external regen resistor (if installed) to the DS2110. The length of this cable
shall be as short as possible. The shields of these voltage supply cables shall be earthed to Chassis Earth using
the EMC kit or the panel earth bar. Alternatively, if the cable is required to pass through an enclosure panel
earthed to Chassis Earth, the shield may be earthed to the panel by use of a 360 degree metal cable gland. If this
is not possible, a copper strap of minimum length should be used. See Figure 1 Partition Crossing.
Figure 1 Partition Crossing
All external Regen (Regenerative circuit) resistors used with the DS2110 must be installed in conductive
enclosures which provide a degree of ingress protection against liquids and objects of at least IP22. Any paint on
the panel or regen resistor enclosure must be removed before the regen resistor enclosure is mounted.
Cables supplying external d.c. supply voltages to the DS2110 Servo-drive (For example, the 24 V
d.c.
supply) must
be as short as possible. The supply wires shall be twisted together or alternatively shielded cable shall be used.
The 24 V
d.c.
supply should be routed as far from the motor power cable as possible to ensure EMC compliance.
Cables connecting the d.c. bus from the DS2110 Servo-drives must be as short as possible. Shielded cable shall
be used.
CAUTION: The filter must be connected to earth before connecting
the supply.
User's whose machine installations require for CE-
Compliance should read this Section .
Required for
CE-Compliance