RoHS
+
-
+
~
~
~
~
+
-
-
+HV
HV
Ground
Aux
2
1
3
Unregulated
Power Supply
Line
Filter
AC
Mains
Equipment Ground
Earth
Ground
Green/Yellow
P-Clip
H
N
Gnd
Plus Panels
Drive
Power
Connector
1-Axis = J7
2-Axis = J10
HV
+
-
Aux
Frame
Ground
Copley Controls, 20 Dan Road, Canton, MA 02021, USA
Tel: 781-828-8090
Fax: 781-828-6547
Web: www.copleycontrols.com
Page 23 of 33
BE2
Accelnet
Plus
2-Axis
Panel EtherCAT
power & groundIng connectIons
dC PoWer ConneCTIonS
• dC power must be provided by transformers that are galvanically isolated and provide reinforced insulation from the mains.
Auto-transformers cannot be used.
• The (-) terminal of the power supply is not grounded at the power supply. It is grounded near each drive.
• Cabling to multiple drives for the +HV and 0V is best done in a “star” configuration, and not a “daisy-chain”.
• The 0V, or return terminal of the dC power should be connected to frame ground near the drive power connector.
from that point, a short wire can connect to the drive HV Ground.
• Cabling to the drive +HV and 0V terminals must be sized to carry the expected continuous current of the drive in the user’s
installation.
• dC power cabling should be shielded, twisted-pair for best emI reduction. The shield should connect to the power supply frame
ground on one end, and to the drive frame ground on the other. Adding a pigtail and ring-lug, as short as possible will provide a
good connection of the shield at the drive.
• motor cabling typically includes a green/yellow conductor for protective bonding of the motor frame.
Connect as shown in the Motor Connections diagram on the following page.
• motor cable conductors should be twisted and shielded for best emI suppression.
• If a green/yellow grounding wire connects the motor to the drive’s Pe terminal, the shield pigtail and ring-lug may connect to one
of the screws that mount the drive to the panel. a P-clip to ground the shield as near as possible to the drive will increase the emI
suppression of the shield. on the motor-end, the shield frequently connects to the connector shell. If the motor cable is a flying-
lead from the motor, the shield may be connected to the motor frame internally.
• Braided cable shields are more effective for emI reduction than foil shields. double-shielded cables typically have a braided outer
shield and foil shields for the internal twisted pairs. This combination is effective for both emI reduction and signal quality of the
feedback signals from analog encoders or resolvers.
• motor cable shielding is not intended to be a protective bonding conductor unless otherwise specified by the motor manufacturer.
• for feedback cables, double-shielded cable with a single outer shield and individual shielded twisted pair internal shields gives the
best results with resolvers, or analog sin/cos encoders.
• In double-shielded cables, the internal shielding should connect to the drive’s Signal Ground on one end, and should be
unconnected on the motor end.
• Single-shield feedback cables connect to the drive frame on one end, and to the motor frame on the other.
Depending on the construction of the motor, leaving the feedback cable shield disconnected on the motor but connected on the
drive end may give better results.
• The drive should be secured to the equipment frame or panels using the mounting slots. This ensures a good electrical connection
for optimal emI performance. The drive chassis is electrically conductive.
dC PoWer WIrInG
P-clips secure cables to a panel and provide full contact to the cable shields after the insulation has been
stripped. This should be done as close to the drive as possible for best emI attenuation.