74
Unidrive M702 User Guide
Issue Number: 3
Figure 4-31 Feedback cable connections
To ensure suppression of radio frequency emission,
observe the following:
•
Use a cable with an overall shield
•
Clamp the overall shield to grounded metallic surfaces at both the
encoder and the drive, as illustrated in Figure 4-31
4.12.4 Compliance with EN 61800-3:2004 (standard
for Power Drive Systems)
Meeting the requirements of this standard depends on the environment
that the drive is intended to operate in, as follows:
Operation in the first environment
Observe the guidelines given in section 4.12.5
on page 74. An external EMC filter will always be
required.
Operation in the second environment
In all cases a shielded motor cable must be used, and an EMC filter is
required for all drives with a rated input current of less than 100 A.
The drive contains an in-built filter for basic emission control. In some
cases feeding the motor cables (U, V and W) once through a ferrite ring
can maintain compliance for longer cable lengths.
For longer motor cables, an external filter is required. Where a filter is
required, follow the guidelines in Section 4.12.5
Where a filter is not required, follow the guidelines given in section
4.12.3
Refer to section 12.1.26
Electromagnetic compatibility (EMC)
page 244 for further information on compliance with EMC standards and
definitions of environments.
Detailed instructions and EMC information are given in the
EMC Data
Sheet
which is available from the supplier of the drive.
4.12.5 Compliance with generic emission standards
The following information applies to frame sizes 3 to 8.
Use the recommended filter and shielded motor cable. Observe the
layout rules given in Figure 4-32 and Figure 4-33. Ensure the AC supply
and ground cables are at least 100 mm from the power module and
motor cable.
Figure 4-32 Supply and ground cable clearance (sizes 3 to 6)
This is a product of the restricted distribution class according
to IEC 61800-3
In a residential environment this product may cause radio
interference in which case the user may be required to take
adequate measures.
Cable
Cable
shield
Twisted
pair
shield
Cable
shield
Twisted
pair
shield
Connection
at motor
Connection
at drive
Ground clamp
on shield
Shield
connection
to 0V
Shield
connection
to 0V
CAUTION
The second environment typically includes an industrial low-
voltage power supply network which does not supply
buildings used for residential purposes. Operating the drive in
this environment without an external EMC filter may cause
interference to nearby electronic equipment whose sensitivity
has not been appreciated. The user must take remedial
measures if this situation arises. If the consequences of
unexpected disturbances are severe, it is recommended that
the guidelines in Section 4.12.5
be adhered to.
CAUTION
≥
100 mm
(4 in)
≥
100 mm
(4 in)
Do not modify
the filter wires
Summary of Contents for Unidrive M702
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