Humidity; Vibration And Shock; Atmosphere - Omron NX-PA Series User Manual

4 Installation and Wiring
4-5-2

Humidity

Rapid temperature changes can cause condensation to occur, resulting in malfunctioning due to
short-circuiting.
When there is a possibility of this occurring, take measures against condensation, such as leaving the
Controller power ON at night or installing a heater in the control panel to keep it warmer.
Power ON
4-5-3

Vibration and Shock

The Controller is tested for conformity with the sine wave vibration test method (IEC 60068-2-6) and the
shock test method (IEC 60068-2-27) of the Environmental Testing for Electrotechnical Products. It is
designed so that malfunctioning will not occur within the specifications for vibration and shock. If, how-
ever, the Controller is to be used in a location in which it will be directly subjected to regular vibration or
shock, then implement the following countermeasures:
• Separate the control panel from the source of the vibration or shock.
Or secure the Controller and the panel with rubber padding to prevent vibration.
• Make the building or the floor vibration-resistant.
• To prevent shock when other devices in the panel such as electromagnetic contactors operate,
secure either the source of the shock or the Controller with rubber padding.
4-5-4

Atmosphere

Using the Controller in any of the following locations can cause defective contact with connectors and
corrosion of components. Implement countermeasures such as purging the air as required.
• In locations exposed to dust, dirt, salt, metal powder, soot, or organic solvents, use a panel with an
airtight structure. Be careful of temperature increases inside the panel.
• In locations exposed to corrosive gas, purge the air inside the panel to clear the gas and then pres-
surize the inside of the panel to prevent gas from entering from outside.
• In locations where flammable gas is present, either use an explosion-protected construction or do not
use the Controller.
4 - 42
Control panel
Moisture
absorber
Controller
Examples of Measures against Condensation
Heater
NX-series CPU Unit Hardware User's Manual (W535)