Kollmorgen MMC Smart Drive Series, Hardware Manual

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Kollmorgen - June 2014 27
MMC Smart Drive Hardware Manual
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INSTALLING THE MMC SMART DRIVE
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Shield or separate the wires connecting the AC power to the filter from other
power cables (e.g., connections between the Drive and the filter, motor power
cable, etc.). If the connections are not separated from each other, the EMI on the
Drive side of the filter can couple over to the source side of the filter, thereby
reducing or eliminating the filter’s effectiveness. The coupling mechanism can
radiate or allow stray capacitance between the wires.
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Bond the filter and the Drive to a grounded conductive surface (the enclosure) to
establish a high frequency (HF) connection. To achieve the HF ground, the con-
tact surface interface between the filter, Drive, and the enclosure should be free
from paint or any other type of insulator.
•
Size the filter following manufacturer recommendations.
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Provide a large enough ground bar to connect all wires with no more than two
wires per connection.
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Clamp motor power cable shield for EMC termination.
3.11.2 Grounding Multiple Drives in the Same Cabinet
1. Mount a common bonded ground bus in the cabinet.
2. Connect the ground wires for all drives to the common bonded cabinet ground
bus.
3. Connect the common bonded cabinet ground bus to an external ground system
that is connected to a single point ground.
3.12 System Wiring Guidelines
The MMC Smart Drive relies on electrical signals to report what is going on in the
application and to send commands to it. In addition, signals are constantly being
IMPORTANT
Filter AC power to the drives to be compliant to CE emission requirements.
WARNING
High voltage exists in AC line filters. The filter must be
grounded properly before applying power. Filter capaci-
tors retain high voltages after power removal. Before
handling the equipment, voltages should be measured
to determine safe levels. Failure to observe this precau-
tion could result in personal injury.