Omron SMARTSTEP 2 SERIES User Manual page 141

Ambient Temperature Control
Servo Drives should be operated in environments in which there is minimal temperature rise to
maintain a high level of reliability.
Temperature rise in any Unit installed in a closed space, such as a control box, will cause the
Servo Drive's ambient temperature to rise. Use a fan or air conditioner to prevent the Servo Drive's
ambient temperature from exceeding 55°C.
Servo Drive surface temperatures may rise to as much as 30°C above the ambient temperature.
Use heat-resistant materials for wiring, and keep its distance from any devices or wiring that are
sensitive to heat.
The service life of a Servo Drive is determined by the temperature around the internal electrolytic
capacitors. The service life of an electrolytic capacitor is affected by a drop in electrostatic capacity
and an increase in internal resistance, which can result in overvoltage alarms, malfunctioning due
to noise, and damage to individual elements.
If a Servo Drive is operated at the ambient temperature of 55°C with the rated torque output and
rated rotation speed, its service life is expected to be approximately 28,000 hours (excluding axial-
flow fan). A drop of 10°C in the ambient temperature will double the expected service life.
Keeping Foreign Objects Out of Units
Place a cover over the Units or take other preventative measures to prevent foreign objects, such
as drill filings, from getting into the Units during installation. Be sure to remove the cover after
installation is complete. If the cover is left on during operation, Servo Drive's heat dissipation is
blocked, which may result in malfunction.
Take measures during installation and operation to prevent foreign objects such as metal particles,
oil, machining oil, dust, or water from getting inside of Servo Drives.
4-1 Installation Conditions
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4-2