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2-1-2 Installation Conditions

H AC Servo Drivers

D Space Around Drivers

• Install Servo Drivers according to the dimensions shown in the following illustration to ensure proper

heat dispersion and convection inside the panel. Also install a fan for circulation if Servo Drivers are

installed side by side to prevent uneven temperatures from developing inside the panel.

• Mount the Servo Drivers vertically (so that the model number and writing can be read).

ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ

50 mm min.

30 mm min.

Fan Fan

Servo Driver

W = 10 mm min.

Side of Unit

Servo Driver

D Operating Environment

Be sure that the environment in which Servo Drivers are operated meets the following conditions.

• Ambient operating temperature: 0°C to +55°C

• Ambient operating humidity: 35% to 85% (RH, with no condensation)

• Atmosphere: No corrosive gases.

D Ambient Temperature

• Servo Drivers 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 ambient

temperature to rise inside the entire closed space. Use a fan or a air conditioner to prevent the ambi-

ent temperature of the Servo Driver from exceeding 55°C.

• Unit surface temperatures may rise to as much as 30°C above the ambient temperature. Use heat-

resistant materials for wiring, and keep separate any devices or wiring that are sensitive to heat.

• The service life of a Servo Driver is largely determined by the temperature around the internal elec-

trolytic capacitors. The service life of an electrolytic capacitor is affected by a drop in electrolytic vol-

ume and an increase in internal resistance, which can result in overvoltage alarms, malfunctioning

due to noise, and damage to individual elements. If a Servo Driver is always operated at the maxi-

mum ambient temperature of 55°C, then a service life of approximately 50,000 hours can be ex-

pected. A drop of 10°C in the ambient temperature will double the expected service life.

System Design and Installation

Chapter 2

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Omron OMNUC U R88M-U Series User Manual

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