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5. RADIO UNIT INSTALLATION ENVIRONMENT
● Installation Environment
Install the Radio Unit avoiding the following environments.
• A place with direct sun light
• A place with extremely high humidity
• A place with corrosive or inflammable gases
• A place with intense electric field or ferromagnetic field occurrence
● Request on Installing Radio Unit
The Radio Unit transmits/receives data using radio waves. For using it with stable
communication status, install it paying attention on the following.
• Install the antennas of the units which communicate parallel to each other as much as
possible.
• Place metallic plates and concrete walls away from the antenna as far as possible (0.3 m
(11.8 in) at least).
• Install the antenna at a place 1.5 m (59.1 in) or higher from the floor to prevent impact from
moving objects (including human bodies).
• When communications are checked with a temporal installation, the unit shall be installed
on a control board or others which the unit is actually to be installed because
communications are affected by the environment near the fixing part such as metal and
concrete. (If the Radio Unit is installed in a metallic control board, install the flange head
antenna outside of the board.)
• The Radio Unit and antenna are indoor types.
If they are used outdoors, place them avoiding water (rain, fog, snow, etc.) and direct sun light
in a nonmetallic container such as a plastic case for outdoors.
Impact of water on the communication distance is assumed for electric wave characteristics.
In addition, if the plastic case has a metallic plate embedded, it shall not be used because it will
be an obstruction and significantly affect the communication distance.
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