Unidrive M Modular Installation Guide
71
Issue Number: 2
Figure 6-16 Feedback cable, twisted pair
Figure 6-17 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 6-17
6.10.3 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 6.10.4
on page 72. 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 Unidrive M 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. The requirements of
operating in the second environment are met, depending on the motor
cable length for 3 kHz switching frequency as stated in Table 6-19.
The table summarizes the performance of in-built filters when used with
Unidrive M size 9 and 10 drives and single pairs of Unidrive M size 9 and
10 drives and Unidrive M Rectifiers, assembled in the standard
recommended configuration.
Table 6-19 Second environment emission compliance
Key:
Unrestricted:EN 61800-3:2004 second environment, unrestricted
distribution
For longer motor cables, an external filter is required. Where a filter is
required, follow the guidelines in
section 6.10.4 Compliance with generic
.
Where a filter is not required, follow the guidelines given in section
6.10.2
Detailed instructions and EMC information are given in the
Unidrive M
EMC Data Sheet
which is available from the supplier of the drive.
Twisted
pair
cable
Twisted pair shield
Cable
Cable overall shield
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
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
.
Drive size
Filter
Voltage
Motor cable length 0 - 100 (m)
9A
In-built
Any
Unrestricted
9/10E
In-built
Any
Unrestricted
9/10D
In-built
Any
Unrestricted
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 6.10.4 Compliance with generic
be adhered to.
CAUTION
CAUTION
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