Siemens YASKAWA 840DI Maintenance Manual page 11

• Store the product in an indoor clean place satisfying the environmental
requirements.
Otherwise damage could result.
• Ambient temperature : -20 to +60 °C
• Relative humidity
• Altitude
Installation
• Do not install the product so that the ventilation openings are restricted. Also,
install the product so that foreign material does not enter it.
Otherwise a fire or damage could result.
• When installing, take care not to subject the product to a strong shock.
Otherwise damage could result.
• The electric power supplied to the product must be sufficient satisfying its power
requirements.
Otherwise malfunction could result.
• The power requirements of the 24 VDC external power supply unit supplying
input/output contacts depend on the number of the contacts they supply.
If necessary to provide more current, install an additional external power supply unit.
• The motors have their flanges and shaft ends coated with rustproof agent.
Remove the agent with a cloth before installing the motors.
• When coupling a motor with a machine, well align the motor with the machine.
Failing to do so could cause vibration, resulting in injury or damage.
• Observe the following when designing or installing enclosures.
A poorly designed or installed enclosure for electric control units could result in damage
or malfunction.
• The enclosures must be hermetically sealed.
• The average temperature rise of the product must be not more than 10 °C.
• Air stirring fans must be installed within the enclosures to improve cooling efficiency
and prevent local heat buildup (fans should be UL certified).
• Sealing to close cable inlet holes and doors must be effective.
• Displays tend to collect airborne dust and thus malfunction. Therefore their enclosures
must be so designed as to prevent dust intrusion.
• CNC units and other units as well as PC boards could malfunction due to accumulated
dust. Therefore their enclosures must be so designed as to prevent dust intrusion.
• Packing must be provided so that cable inlet holes, doors, and back plates are fully
closed.
MANDATORY
: 10 to 90 %
: 1000 m or lower
CAUTION
xi
Safety precautions