Control Panel Installation; Temperature; Natural Cooling; High Temperatures - Omron CJ2 CPU UNIT User Manual

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5 Installation
5-4

Control Panel Installation

To ensure system reliability and safety, the system must be designed and configured according to the
installation environment (temperature, humidity, vibration, shock, corrosive gases, overcurrent, noise,
etc.).
5-4-1

Temperature

Panels have been reduced in size due to space-saving and miniaturization in devices and systems, and
the temperature inside the panel may be at least 10 to 15°C higher than outside the panel. Implement
the following measures against overheating at the installation site and in the panel, and allow a suffi-
cient margin for the temperature.

High Temperatures

Use the following cooling methods as required, taking into account the ambient temperature and the
amount of heating inside the panel.

Natural Cooling

Natural cooling relies on natural ventilation through slits in the panel, rather than using cooling
devices such as fans or coolers. When using this method, observe the following points.
• Do not install the PLC at the top of the panel, where hot air tends to stagnate.
• To provide ventilation space above and below the PLC, leave sufficient distance from other
devices, wiring ducts, etc.
• Do not mount the Units in the wrong direction (e.g., vertically or upside down). Doing so may
cause abnormal heating in the PLC.
• Do not install heat-generating equipment, such as heaters, transformers, and devices with high
resistance, directly above the panel.
• Do not install the PLC in a location exposed to direct sunlight.
Natural Cooling
Forced Ventilation (by Fan at Top of Panel)
Fan
Air filter
Forced Ventilation Method
5-42
PLC
PLC
PLC
PLC
CJ2 CPU Unit Hardware User's Manual

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