Rockwell Automation 42EF RightSight Photoelectric Sensors - Manual (Page 2)

2
Typical Response Curves
Glass Fiber Optic Sensors Background Suppression Sensors
Distance [m (ft)]
Distance [m (ft)]
Distance [mm (in.)]
1000
100
1
10
Background Suppression
Be
am
Di
am
et
er
[mm
]
Transmitted Beam
Diffuse Beam Pattern
Be
am
Di
am
et
er
[m
m]
Be
am
Di
am
et
er
[m
m]
Be
am
Di
am
et
er
[m
m]
Standard Retroreflective
Standard Retroreflective Diffuse Sharp Cutoff Diffuse
6
5
4
3
2
1
Polarized Retroreflective
O
per
at
in
g
M
ar
gi
n
0.01
(0.03)
Distance to 76 mm Reflector, 92- 39 [m (ft)]
10
(32.8)
1
(3.28)
0.1
(0.328)
100
10
1
O
per
at
in
g
M
ar
gi
n
10
(32.8)
1
(3.28)
0.1
(0.328)
100
10
1
O
per
at
in
g
M
ar
gi
n
Distance to White Target [cm (in.)]
1
(0.4)
0.1
(0.04)
10
(3.9)
100
(39)
100
10
1
O
per
at
in
g
M
ar
gi
n
Distance to White Target [mm (in.)]
25.4
(1.0)
2.54
(0.1)
254
(10)
100
10
1
O
per
at
in
g
M
ar
gi
n
Distance to White Target [m (ft)]
10
(32.8)
1
(3.28)
0.1
(0.328)
100
(328)
4 m
20 m
20
10
0
--10
--20
Polarized Retroreflective Beam Pattern
Be
am
Di
am
et
er
[m
m]
0
Distance [m (ft)]
3
(10)
2
(7)
1
(3)
150
0
Be
am
Di
am
et
er
[m
m]
1
(3)
0
100
50
--150
--100
--50
2
(7)
3
(10)
4
(13)
5
(16)
6
(20)
15
5
--15
Distance [cm (in.)]
20
(8)
0 40
(16)
60
(24)
0
--5
Transmitted Beam—4 m Beam Pattern
0.2
0.1
Distance [m (ft)]
1
(3)
0
0
--0.2
--0.1
2
(7)
3
(10)
4
(13)
Transmitted Beam—20 m Beam Pattern
0.5
0.4
0.25
Distance [m (ft)]
10
(33)
5
(17)
0 15
(50)
0.12
0
--0.12
--0.25
--0.4
--0.5
20
(67)
20
(0.7)
0 40
(1.5)
60
(2.3)
80
(3.1)
100
(3.9)
100 mm
50 mm
Distance to White Target [mm (in.)]
Background Suppression Beam Pattern
4
2
0
--4
--2
1
(3)
0 2
(7)
3
(10)
4
(13)
5
(16)
6
(20)
Be
am
Di
am
et
er
[mm
]
100 mm
50 mm
Target
Sensitivity
Adjustment
Retaining
Clip
Groove in
end tip
Note: Due to the detection method, targets traveling horizontal to the sensor’s
optics are detected. Targets traveling vertically may not be accurately detected.
For reliable background suppression, a minimum separation distance of 6 mm
(0.24 in.) is recommended between the target and the backgrounds.
Table 1: LED Function
Label Color State Status
Output Yellow
OFF Output de-energized
ON Output energized
Flashing Output SCP active (DC models only)
Margin Orange
OFF Margin <2.5
ON Margin >2.5
Flashing Output SCP active (AC models only)
Status Green
OFF Sensor not powered, output active, SCP active
ON Sensor powered
Note: For DC models, output and margin LEDs alternate flashing when SCP is active.
Sensor Alignment
The orange LED is an alignment aid which indicates that a margin of 2.5 has been
reached. This means that the sensor is receiving at least 2.5 times the signal strength
back from the target needed to trigger an output signal. In general, it is desirable to
have a higher margin to help overcome any deteriorating environmental conditions, i.e.,
dust build-up on the sensor’s lens. When aligning the sensor, the best performance can
be obtained if this margin indicator is illuminated with the target in place.
When aligning diffuse mode sensors, ensure that the sensitivity be set at its maximum
setting using the single-turn adjustment knob on the front panel. Pan the sensor left,
right, up, and down to center the beam on the target. It may then be necessary to
decrease this setting to prevent the sensor from detecting a background object. If this
problem persists, the application will require the use of a background suppression,
sharp cutoff diffuse, or retroreflective sensing mode.