Omron WE70-AP Operation Manual page 36

Chapter 2. Installation & Connection
(1) Install antennas so that there is a direct line of sight between them
WE70 uses radio waves with a frequency of 2.4GHz and 5GHz, which are very high. High-frequency
waves, which exhibit strong rectilinear propagation and are reflected easily. For this reason, much
consideration is required for the Antenna installation location to achieve optimal wireless performance.
This is particularly important point for long distance communication over 50 to 60m.
Transmitting Antenna
2
If the Antennas are installed in locations with relatively high ceilings and a lot of open space, even if there
is no direct line of sight between the Antennas, if one of the Antennas is installed in a high location,
communications may still be possible via radio waves that are reflected off the ceiling.
(2) Install in as high location as possible
As mentioned in the preceding paragraph, if the Antennas are installed in high locations, since the space
surroundings the Antennas will be more open, there will be less influence from obstacles, and the radio
waves will propagate more easily.
(3) Do not put any obstacle (especially a metal object) near the Antennas
If there are obstacles near the Antennas (in particular, in the direction of radio wave propagation), the
radio waves may not be propagated due to the influence of the objects. Metal objects have the greatest
influence as they reflect radio waves, whereas glass and plastic objects allow the waves to pass through
and so have the least influence. Be sure to install Antennas at least 30 cm away from any obstables.
(4) Install the Antennas with the same orientation
Install Antennas that are performing communications with the same orientation, as shown in the following
diagram. If they are installed at an angle of 90 degrees to each other, the possible communications
distance will be shortened.
(5) Do not subject the Antenna to shock
Do not install an antenna which it may be hit by other objects.Take preventive measures for installation in
such a place.Subjecting the Antenna to strong shock may cause either external or internal damage to the
Antenna. Internal damage that is not necessarily visible may prevent communications, such as broken wires.
2-4
Obstacle
High Antenna Location
Obstacle
Obstacle
Area not in a direct
line of sight from the
Antenna
Antenna that is
difficult for the
waves to reach
Radio Wave Energy
Obstacle
Antenna that
waves will reach