5
MOUNTING HEIGHT
• In areas where there are trees or weeds, the photoelectric beams may become obstructed by overgrown branches or leaves.
As this may cause false detection, be sure to trim down leaves and branches according to the growth of the plants.
Furthermore, the photoelectric beams may get obstructed by swaying branches or leaves due to wind.
• Vine plants may wrap around the photoelectric beam sensors causing false detections. Therefore, be sure to prune such plants regularly.
• Insects, bird droppings, or other natural phenomena may also soil the sensors causing false detection. Be sure to clean the sensors regularly.
Cautions when using the outdoor photoelectric beam sensor (Regular maintenance)
PROTECTION DISTANCE AND
LIGHT BEAM COVERAGE
As the infrared light leaves the transmitter, it expands into conical shaped light beams.
The optical axis is in the center of the light beams. Adjust the reflector so that the device on the opposite
side is in the center of the light beams.
As these sensors are designed to detect humans, adjust the center of the sensors to the height of
approximately 2.6ft (0.8 m) from the ground when installing both on a wall and on a pole.
If the optical axis (center of the light beams) is aligned
correctly, a detection line with suf f icient margin of
sensitivity is formed.
If the optical axis is not aligned correctly, there will be
insuf f icient margin of sensitivity even if the receiver is at
the center of the light beams, making the system more
susceptible to adverse effects of the environment
resulting in a malfunction.
A: Protection Distance
165
’
( 50 m )
330
’
(100 m)
Approx. 4
’
(1.2 m)
Approx. 8
’
(2.4 m)
B: Light Beam Coverage
Installing by adjusting the center of the sensor to
approximately 2.6ft (0.8 m) from the ground i.e. the
protection line is at waist height for humans, for reliable
detection.
If the installation position is too high or too low, making
protection line above shoulder height or below knee
height, detection becomes less reliable.
WRONG
CORRECT
WRONG
CORRECT
Side View
Top View
OPTICAL AXIS ADJUSTMENT RANGE
Refer to the diagram below, and install the sensors within the optical axis adjustment
range. (Photoelectric beams are shown in simplified form)
4.45
”
(113 mm)
4.45
”
(113 mm)
7.24
”
(184 mm)
Approx. 2.6
’
(0.8 m)
WRONG
WRONG
CORRECT
(Movable within 180°)
+90°
–90°
(Movable within 40°)
(Movable within 40°)
+20°
–20°
+20°
–20°
(Example 1)
(Example 2)
(Example 3)
Within 20°
Within 20°
Within 20°
Within 20°
Range where the optical
axis is shielded
Caution
The optical axis may be shielded depend-
ing on the shape of the housing and
mounting surface.
Check the optical axis range carefully and
start installation before use.
