Precautions For Proper Use - Panasonic PM2 Series Manual

SENSING CHARACTERISTICS (TYPICAL)
Sensing fields
• Horizontal (left and right) direction
10
0.394
8
0.315 White
6
0.236
5
0.197
4
0.157
N5
2
0.079
0
2 1 0 1 2
0.079 0.039 0.039 0.079
Left Center Right
Operating point (mm in)
Correlation between lightness and sensing range
10
0.394
8
0.315
6 Sensing region
0.236
5
0.197
4
0.157
2
0.079
0
N2 N4 N6 N8
Dark Lightness Light
N1 N2 N3 N4 N5 N6 N7 N8 N9

PRECAUTIONS FOR PROPER USE

All models
• 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.
Mounting
• 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).
Plain washer
(Outer dia: ø6 mm
Spring washer
Purchase separately.
M3 screws
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.
Convergent Reflective Micro Photoelectric Sensor
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.
Horizontal direction
15 × 15 mm 0.591 × 0.591 in
Non-glossy paper
L
Sensor
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.
Lightness shown on the left
may differ slightly from the
actual object condition.
ø0.236 in)
O
+
• Vertical (up and down) direction
10
0.394
8
0.315
White
6
0.236
5
0.197
4
0.157
N5
2
0.079
0
2 1 0 1 2
0.079 0.039 0.039 0.079
Up Center Down
Operating point (mm in)
Correlation between material (15 × 15 mm
20
0.787
15
0.591
10
0.394
5
0.197
0
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
• The 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.
However, the specular background should be a plane
surface, directly facing the sensor. A spherical or curved
background may be detected.
PM2
SERIES
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
15 × 15 mm 0.591 × 0.591 in
Non-glossy paper
L
Sensor
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.
Sensing
object
5 mm
0.197 in
30 mm 1.181 in
or more
Sensor
5