Convergent Reflective Micro Photoelectric Sensor
PM2
SERIES
5
SENSING CHARACTERISTICS (TYPICAL)
Sensing fields
•
Horizontal (left and right) direction
The sensors can be mounted
side by side.
However, if the sensor
is slanted, there may be
interference.
Verify first whether there is any
interference prior to use.
•
Vertical (up and down) direction
2
0.079
1
0.039
0
1
0.039
2
0.079
0
Operating point ℓ (mm
in
)
Setting distance
L
(mm
in
)
Center
Right
Left
Distance to convergent point
White
N5
2
0.079
5
0.197
10
0.394
8
0.315
4
0.157
6
0.236
Distance to convergent point
0
Operating point ℓ (mm
in
)
Setting distance
L
(mm
in
)
Center
Down
Up
White
N5
2
0.079
0.157
5
10
8
4
6
0.197
0.236
0.315
0.394
2
0.079
1
0.039
0
1
0.039
2
0.079
The sensors can be mounted
side by side.
However, if the sensor
is slanted, there may be
interference.
Verify first whether there is any
interference prior to use.
Vertical direction
ℓ
L
15 × 15 mm
0.591 × 0.591 in
Non-glossy paper
Sensor
Correlation between lightness and sensing range
N2
0
Lightness
Light
Dark
N4
N6
N8
N2
N1
N3 N4 N5 N6 N7 N8 N9
Sensing range
L (mm
in
)
Distance to convergent point
2
0.079
0.157
5
10
8
4
6
0.197
0.236
0.315
0.394
Sensing region
The sensing region (typical)
is represented by oblique
lines in the left figure.
However, the sensitivity
should be set with enough
margin because of slight
variation in products.
Correlation between material (15 × 15 mm
0.591 × 0.591 in
) and sensing range
The bars in the graph
indicate the sensing range
(typical) for the respective
material. However, there
is a slight variation in the
sensing range depending on
the product.
Further, if there is a
reflective object (conveyer,
etc.) in the background of
the sensing object, since
it affects the sensing,
separate it by more than
twice the sensing range
shown in the left graph.
Mirror
Glossy stainless steel Glossy copper plate
Non-glossy aluminum plate
White non-glossy paper White ceramic circuit board
Glass epoxy printed circuit board (Green masked surface)
Black-painted, non-glossy iron plate
Gray non-glossy paper (N5)
Sensing range
L
(mm
in
)
Distance to convergent point
0
5
0.197
0.394
0.591
0.787
10
15
20
Lightness shown on the left
may differ slightly from the
actual object condition.
PRECAUTIONS FOR PROPER USE
All models
•
When fixing the sensor with screws, use M3 screws and
the tightening torque should be 0.49 N·m or less.
Further, use small, round type plain washers (ø6 mm
ø0.236 in
).
O
+
M3 screws
Plain washer
(Outer dia: ø6 mm
ø0.236 in
)
Spring washer
Purchase separately.
Mounting
Others
•
Do not use during the initial transient time (50 ms) after the
power supply is switched on.
•
Take care that the product does not come in direct contact
with oil, grease, or organic solvents, such as, thinner, etc.
Wiring
•
Make sure to connect terminals correctly as the sensor
does not incorporate a reverse polarity protection circuit.
•
If the sensor is being used in a noisy environment,
examine the extent of noise. Further, if equipment, such
as motor, solenoid or electromagnetic valve, which
generates a large surge, is present near the sensor,
connect a surge absorber to the equipment.
Setting
• T
he optimum setting
distance (distance to
convergent point) is
5 mm
0.197 in
.
The sensor is not affected
even by a specular
background if it is located
30 mm
1.181 in
, or more,
away from the sensor.
5 mm
0.197 in
Sensor
Sensing
object
Background
30 mm
1.181 in
or more
However, the specular background should be a plane
surface, directly facing the sensor. A spherical or curved
background may be detected.
Sensor
15 × 15 mm
0.591 × 0.591 in
Non-glossy paper
L
ℓ
Horizontal direction
•
Never use this product as a sensing device
for personnel protection.
•
In case of using sensing devices for
personnel protection, use products which
meet laws and standards, such as OSHA,
ANSI or IEC etc., for personnel protection
applicable in each region or country.
