Wireless Control Unit
18
6. For Proper Use of This Product
6.4. Radio Influence and Interference in Installation Environments
Check the following installation conditions, as they may significantly shorten the spacing distance.
• When there is an obstacle (metal objects such as steel plates, wire mesh, or other noise-generating devices such
as concrete walls or welding machines) between the products
• When there is another wireless device nearby
• When strong wireless radio waves are constantly generated (e.g., video streaming over a wireless LAN, microwave
oven use, and so on.)
• The maximum number of units that can be installed in the same building is 40 units.
* The number of units is the total number of transmitters, repeaters, and receivers.
In addition, it is important to secure a "clear view space (Fresnel zone) free of obstacles" between products for
stable communication. Installation should be done paying attention to securing the Fresnel zone as described below.
Fresnel Zone
L
D
WIO
WIO
Transmitter
Receiver / Repeater
L
D
Line of sight distance
Fresnel zone diameter
100m
3.6m
50m
2.6m
10m
1.2m
Obstacles (wall, floor, ceiling, pillar, building)
Fresnel Zone
WIO
WIO
Transmitter
Receiver / Repeater
