Siemens YASKAWA 840DI Maintenance Manual page 12

Safety precautions
• Observe the following when installing the units.
• Do not install and attempt to operate any units that are physically broken or
• The maximum operating temperature of 55°C must not be exceeded. The air draft
Wiring
• Shut off power to the product before attempting to work for wiring on it.
• Wiring work must be done only by qualified personnel.
• After wiring work for completing an emergency stop circuit, always check the
• The grounding terminals
Poorly installed units could result in damage or malfunction:
• The Drive Units must be fixed upright using screws or bolts.
• The Drive Units must be provided with enough space over and under them to allow
them to effectively dissipate their heat.
• Install a Drive Unit in an enclosure such that the heat sink fins of the unit come out of
the enclosure to keep the unit's internal temperature lower. The exposed heat sink fins
must be subjected to a 2.5 m/s air draft.
• If an air stirring fan is installed inside an enclosure, the fan must be oriented such that
the air does not directly hit a Drive Unit (to prevent the Drive Unit from collecting more
dust).
• Units must be installed such that check, replacement and other servicing activities are
implement easily.
damaged.
Otherwise injury could result.
hitting the heat sink of Drive Units must be at not more than 45°C.
Overheat by failure to do so could result in a burn or a fire.
Otherwise electric shock or a fire could result.
Otherwise electric shock, malfunction or a fire could result.
circuit for functionality. The worker is responsible for the wiring work.
Otherwise injury could result.
Otherwise electric shock or a fire could result.
CAUTION
WARNING
must be grounded properly.
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