Observe the following guidelines when mounting a field controller:
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Ensure the mounting surface can support the controller, DIN rail, and any user-supplied enclosure.
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Mount the controller horizontally on 35 mm DIN rail whenever possible.
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Mount the controller in the correct mounting position ( Figure 1 ).
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Whenever possible in wall-mount applications, mount the controller on a hard, even surface.
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Use shims or washers to mount the controller securely and evenly on the mounting surface.
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Mount the controller in an area free of corrosive vapors and observe the ambient conditions requirements in Technical specifications.
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Provide sufficient space around the controller for cable and wire connections, easy cover removal, and good ventilation through the controller (50 mm [2 in.] minimum on the top, bottom, and front of the controller).
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Do not mount the controller on surfaces prone to vibration, such as ductwork.
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Do not mount the controller in areas where electromagnetic emissions from other devices or wiring can interfere with controller communication.
Observe these additional guidelines when mounting a controller in a panel or enclosure:
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Mount the controller so that the enclosure walls do not obstruct cover removal or ventilation through the controller.
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Mount the controller so that the power transformer and other devices do not radiate excessive heat to the controller.
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Do not install the controller in an airtight enclosure.
