6
vacon • 44
CABLING AND CONNECTIONS
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
Figure 24. Installation of ferrite rings on single (left) and parallel (right) motor cables
6.2.3
Thermal supervision of ODC
ODC is equipped with a thermal supervision which will indicate if the filter temperature has
exceeded safe limits. Always refer to cabinet specific electrical drawings for details.This NC contact
is wired to the external fault input DIN3 by factory default.
NOTE!
If the external fault input DIN3 is used for other purposes, make sure that the +ODU fan
supervision wiring is changed accordingly. It is also possible to connect the NC contact in series
with RUN or RUN ENABLE commands (see relevant application manual for more details).
6.2.4
DC supply and brake resistor cables
Vacon 6- and 12-pulse frequency converters can optionally be equipped with terminals for DC
supply and with an external brake resistor. These terminals are marked with B-, B+/R+ and R-. The
DC bus connection is made to terminals B– and B+ and the brake resistor connection to R+ and R–
on the converter module. The converter module terminals can also optionally be wired to customer
terminals in the cabinet. For additional information on integrated brake chopper and resistor
values please refer to NXS/NXP manual.
6.2.5
Control cable
For information on control cables see Chapter
8.2. The control cables are routed down to the
bottom of the cabinet in the left inner side of the cabinet.
Make sure that the converter is equipped with a brake chopper before connecting a
brake resistor.
Do not connect the brake resistor between the terminals B- and B+ as this will
damage the drive.
Ferrite rings
Metallic wall
of cabinet
Screen connected
to earth
Motor cable
PE
Mains cable
High frequency
earthing
Motor cable
Ferrite rings
Metallic wall
of cabinet
Screen conneted
to earth
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