Omron E3X-NL - User manual

E3X-NL
A-197E3X-NL
Optical Fiber Glossy Object Sensor
E3X-NL
Utilization lightwave technology has inno-
vated glossiness detection. OMRON's
glossy object sensor can discriminate a
wide variety of glossiness differences. The
fiber-optic system has achieved the small,
non-contact models.
Features
Employs OMRON's unique FAO (Free Angle Optics)
technology which enables delicate sensing of object
glossiness without influence from colors and patterns.
Transparent films on boxes and labels on transparent films
can be detected.
The teaching system ensures easy adjust-
ment just by pressing the button.
Two different types of fiber heads meet a wide range
of applications.
Two different fiber heads are available.
According to applications, you can choose the short-distance,
small spot type ideal for detection of small objects or the long-
distance type that can perform in-line standard detection.
Adopts the pulse-ON system that is insensi-
tive to disturbance light
The emitter (red LED) in the fiber head uses a pulse-ON
system to minimize the influence of disturbance light. The
Sensor provides stable sensing characteristics if disturbance
light occurs from fluorescent lamps in-line.
●Adjustment man-hour saving
type requiring only a one-time
pressing of the button
●Teaching system only re-
quires to push the button, en-
suring sensitivity adjustment
without individual differences.
Long-rangeShort-range small spot
Short-distance, small spot type Long-distance type
Ideal for precision detection
and small object detection.
E32-S15L-1/-2
Resistant to object shake and
enables in-line standard detec-
tion.
20 ±7 mm
E32-S15-1/-2
10 ±3 mm
Small spot in 2 mm dia.
Amplifier Units
E3X-NL11

A-198 Standard Photoelectric Sensors
Application
Short-distance, small spot type
Long-distance type
Features
Principles for Glossiness Detection by FAO
First, the light from a red LED passes through a polarizing fil-
ter so only the S wave is emitted.
If the detectable object is glossy, the S wave is reflected reg-
ularly and is transmitted as is to the Fiber Receiver 1.
If the detectable object is not glossy, there is more diffuse re-
flection, thus the polarization direction is randomized and a P
wave is generated.
The S and P waves are divided by the FAO (special polarized
beam splitter), the waves travel to their respective fiber receiv-
ers, and the variation in the glossiness is determined by com-
paring the two received signals.
Fuzzy Teaching Function Backs up Stable Detection
Supported by the fuzzy teaching function if objects have no
difference in glossiness. If the glossiness difference goes be-
low than the minimum sensing lev-
el, the microprocessor in the
amplifier determines the discrimi-
nation means automatically.
Sensed by light energy difference
like an ordinary mark sensor.
(When 2-point teaching is selected)
Measures against Double Refraction
There are transparent films and transparent plastic objects that
change the direction of polarized light when it passes through
the transparent films and transparent plastic objects. This is
called double refraction. Using the optional rotary mounting
bracket (E39-L109), the sensor unit can be inclined 45 degrees
to take measures against double refraction.
(Example) Metal cylindrical object coated with transparent film
Detection of tacked labels Detection of grease or adhesive on parts Detection of pipe, can or similar joints
Detection of on-bottle labels insensitive to
distance variation or object inclination, en-
abling label detection on conveyor line.
Detection of shrink tubes Transparent shrink
tubes can be detected stable.
Detection of sealing tape
Received fiber 1
(S wave only)
Received fiber 2
(P wave only)
Polarized filter
FAO
Emission S wave only
Sensing
object
EmitterLens
S wave: vertical
P wave: parallel
Metal cylindrical
object coated with
transparent film
Sensing head
The object can be sensed smoothly when
the angle of the sensing head is either 0
˚ or 45 ˚ .
45
˚
Difference in
grossiness
Distinction means
Output
Difference in
light energy

A-199E3X-NL
E3X-NL
Ordering Information
Sensors
Amplifier Units
Fiber Units
Accessories (Order Separately)
Mounting Brackets
Covers
Connection
method Shape Model
Pre-wired type E3X-NL11
Sensor type Shape Sensing distance Fiber length Model
Reflective model
0.5 m E32-S15-1
1 m E32-S15-2
0.5 m E32-S15L-1
1 m E32-S15L-2
Shape Model Quantity Remarks
E39-L109 1
Can be used with the fiber unit
E32-S15-
# . Mounting bracket vari-
able in rotary angle (0°, 45°) for sta-
ble detection of transparent films
(double-refractive objects) on
glossy objects such as metal or
glass plates.
Shape Model Quantity Remarks
E39-G9 1
Attached to the amplifier unit
E3X-NL11. Please place an
order when the protective cover
is damaged or lost.
32.2
33
59
Red li
g
ht
10 ±3 mm
20 ±7 mm

A-200 Standard Photoelectric Sensors
Rating/Performance
Amplifier Units
* The OFF-delay timer can be reset by setting the switch.
Fiber Units
Item Model E3X-NL11
Light source (wave length) Red LED (680 nm)
Power supply voltage 12 to 24 VDC ±10%, ripple (p-p) : 10% max.
Current consumption 100 mA max.
Control output Load supply voltage 30 VDC max., load current 100 mA max. (residual voltage 1 V max.)
Open collector output type (NPN output) Light-ON/Dark-ON switch selectable
Answer-back output Load power supply voltage 30 VDC max., load current 100 mA max. (residual voltage 1 V max.)
Open collector output type (NPN output)
Remote teaching input
Purple and blue (0 V) are connected when remote input turns ON: 0 V short-circuit current 1 mA max. Purple
and blue (0 V) are disconnected when remote input turns OFF: Open or 9 V min. (max. input voltage 24 V).
Note that the input is valid only when remote RUN/TEACH selection input (across pink-blue) is provided.
Protective circuits Protection from load short-circuit and reversed power supply connection
Response time Operation or reset: 1 ms max.
Sensitivity adjustment Teaching system
Timer function * OFF-delay fixed at 40 ms
Ambient illuminance Incandescent lamp: 3,000 lux max. Sunlight 10,000 lux max.
Ambient temperature Operating: -25°C to 55°C, Storage: -40°C to 70°C (with no icing or condensation)
Ambient humidity Operating: 35% to 85% RH, Storage: 35% to 95% RH (with no icing or condensation)
Insulation resistance 20 M min. at 500 VDC
Dielectric strength 1,000 VAC at 50/60 Hz for 1 minute
Vibration resistance 10 to 55 Hz, 1.5-mm double amplitude or 300 m/s2(approx. 30G) for 2 hrs each in X, Y, and Z directions
Shock resistance Destruction: 500 m/s2for 3 times each in X, Y, and Z directions
Protective structure IEC 60529 IP50 (with Protective Cover attached)
Connection method Pre-wired models (standard length: 2 m)
Weight (Packed state) Approx. 200 g
Mate-
rial
Case PBT (polybutylene terephthalate)
Cover Polycarbonate
Mounting Brackets Stainless steel (SUS304)
Accessories Mounting bracket, instruction manual
Sensing method Reflective model
Features Short-range small spot Long-range
Item Model E32-S15-1 E32-S15-2 E32-S15L-1 E32-S15L-2
Sensing distance 10±3 mm (white paper, white glossy plastic
40x20 mm)
20±7 mm (white paper, white glossy plastic
40x20 mm)
Min. sensing object 0.5-mm 2-mm
Sensing object angle
Glossiness determination is possible at 4°
inclination from the mounting hole (at sensing
distance of 10 mm)
Glossiness determination is possible at 7°
inclination from the mounting hole (at sensing
distance of 20 mm)
Spot diameter Approx. 2-mm dia./approx. 2-mm dia. (at sensing
distance of 10 mm)
Approx. 15-mm dia./approx. 4-mm dia. (at sens-
ing distance of 20 mm)
Ambient temperature Operating: -25°C to 55°C, Storage: -40°C to 70°C (with no icing or condensation)
Ambient humidity Operating: 35% to 85%RH, Storage: 35% to 90% RH (with no condensation)
Permissible bending radius 4 mm min.
Protective structure IEC 60529 IP50
Fiber length 500 mm 1 m 500 mm 1 m
Weight (Packed state) Approx. 50 g Approx. 60 g Approx. 80 g Approx. 90 g
Material
Sensor case Heat-resistant ABS resin
Sensor window transparent glass Acrylics
Fiber cladding urethane

A-201E3X-NL
E3X-NL
Characteristic data (typical)
Output Circuit Diagram
NPN output
Glossiness vs. Operating Range (Typical) Glossiness vs. Angle (Typical)
E3X-NL11 with E32-S15-#E3X-NL11 + E32-S15-#(X direction) E3X-NL11 + E32-S15L-#(X direction)
E3X-NL11 with E32-S15L-#E3X-NL11 + E32-S15-#(Y direction) E3X-NL11 + E32-S15L-#(Y direction)
Model Output transis-
tor Status Timing chart Mode selec- tion switch Output circuit
E3X-NL11
Light ON L ON
Dark ON D ON
140
120
100
80
60
40
20
Set distance (mm)
0 5 10 15 20 25
White drawing paper
White glossy plastic
Sensing object: 40 x20 mm
Set distance
Relative glossiness (%)
140
120
100
80
60
40
20
0
Angle (˚)
-10 -50 510
10mm
Relative glossiness (%)
White drawing paper
White glossy plastic
Sensing object:
40 ¥20 mm -
+140
120
100
80
60
40
20
0
Angle (˚)
-10 -50 510
20mm
Relative glossiness (%)
White drawing paper
White glossy plastic
Sensing object:
40 ¥20 mm -
+
140
120
100
80
60
40
20
Set distance (mm)
010203040
Set distance
Relative glossiness (%)
White drawing paper
White glossy plastic
Sensing object: 40 ¥20 mm 140
120
100
80
60
40
20
0
Angle (˚)
-15 -10 -50 51015
10mm
Relative glossiness (%)
White drawing paper
White glossy plastic
Sensing object:
40 ¥20 mm
-
+140
120
100
80
60
40
20
0
Angle (˚)
-15 -10 -50 51015
20mm
Relative glossiness (%)
White drawing paper
White glossy plastic
Sensing object:
40 ¥20 mm
-
+
Light
indicator
(orange)
Output
transistor
Load
(e.g., relay)
Incident
Interrupted
ON
OFF
ON
OFF
Operate
Reset (Between brown and
black terminals)
T: OFF delay timer
The change for 0 or 40ms (fixed) is possible.
T
Stability
indicator
(green)
Operation
indicator
(orange)
Teaching
indicator
(red/green)
Main
circuit
12 to 24
VDC
Remote
RUN/TEACH
input Remote
teaching
input
Answer-back output
Control output
Brown
Black
Orange
Blue
Pink
Purple
Load
Load
Light
indicator
(orange)
Output
transistor
Load
(e.g., relay)
Incident
Interrupted
ON
OFF
ON
OFF
Operate
Reset
(Between brown and
black terminals)
T: OFF delay timer
The change for 0 or 40ms (fixed) is possible.
T
Light
indicator
(orange)
Output
transistor
Load
(e.g., relay)
Incident
Interrupted
ON
OFF
ON
OFF
Operate
Reset
(Between brown and
black terminals)
T: OFF delay timer
The change for 0 or 40ms (fixed) is possible.
T

A-202 Standard Photoelectric Sensors
Technical Guide
Glossiness
When light is applied to the sensing object, the reflected light
is generally a mixture of regular reflection components and
diffuse reflection components. Glossiness is directly propor-
tional to the light intensity of the regular reflection compo-
nents. In JIS, the glossiness of a glass plate surface having
1.567 reflectivity is defined 100 as the basis of glossiness.
Glossiness of Typical Object Sensed by E3X-NL11 + E32-
S15
Sensing of Transparent Objects with Rotating Fiber Unit
Mounting Bracket
There are transparent films and transparent plastic objects
that change the direction of polarized light when it passes
through the transparent films and transparent plastic objects.
When E3X-NL senses these transparent films and transpar-
ent plastic objects on glossy background objects, such as
glossy paper or metals, E3X-NL will not sense these objects
smoothly in case of an incorrect angle of the sensor head. The
most suitable angle of the sensor head varies with the trans-
parent object. The angle of the sensor head can be, however,
0° or 45° for the smooth sensing of such transparent objects
due to the characteristic of polarized light. There is no need
for the angle to be midway between 0° and 45°. E39-L109,
which is sold separately, is a mounting bracket that rotates to
angles of 0° or 45° and enables E3X-NL to sense such trans-
parent objects smoothly with its sensing head set at 0° or 45°
without changing the sensing positive.
Fuzzy Teaching Function
E3X-NL in two-point teaching operation will perform fuzzy
computation using the difference in glossiness and the differ-
ence in light energy between the two teaching points to deter-
mine the thresholds setting with E3X-NL. As shown in the
following table, if there is only a small difference in glossiness
but there is a large difference in light energy between the two
teaching points, the thresholds set with E3X-NL will be deter-
mined by the light energy values.
Countermeasures against Teaching Errors Resulted with
Transparent Labels on Sheets
The material of the sheets must not be too glossy.
Nomenclature:
1,000
100
10
Object no.
1 2345678910
Glossiness
1. White paper
2. Brown corrugated cardboard
3. Paper gummed tape
4. White glossy paper (individu-
al packages for OMRON
sensors)
5. Blue mount paper for label
6. Transparent label on blue
mount paper
7. Glossy plastic
8. Transparent glass (t=1 mm)
9. Gold printing ink (Gold part
of Cabin Mild Box)
10. Metal mirror surface (SUS
mirror surface)
Taught
Difference
in glossiness
between two
teaching points
Taught
Difference
in light energy
between two
teaching points
Discriminating method
Large Large Discriminated by glossiness.
Large Small Discriminated by glossiness.
Small Large Discriminated by light energy.
Small Small
Discriminated by glossiness. A
teaching error will result if the dif-
ference in glossiness and that in
light energy are both less than the
sensing levels of E3X-NL.
(Example) Metal cylindrical object coated with transparent film
Metal cylindrical object
coated with
transparent film
Sensing head
The object can be sensed smoothly when the
angle of the sensing head is either 0˚or 45˚.
45˚
Operation indicator
(orange)
Teaching button
Mode selector
Stability indicator
(green)
Teaching indicator
(red/green)
Operation mode
selector
Difference in glossiness Large
Discriminated by glossiness
Fuzzy discrimination of glossiness and light energy
Discriminated by light energy
Difference in light energy LargeSmall Teaching error

A-203E3X-NL
E3X-NL
Operation
Sensitivity setting
Two-point teaching
Pro
ce-
dur
e
Setting Operation
1--- Locate the sensor head within the sensing
distance.
2Move the mode selector to the
position.
3
Press the teaching button once with a
sensing object located under the sensor
as shown in the following illustration.
4
With an object absent (ground), press the
TEACHING button (second time).
If teaching is OK
If teaching is NG
5
Move the mode selector to the po-
sition. Sensitivity setting is complete.
6
Light Dark
Select the desired operation
format with the operation mode selector
(L.ON/D.ON).
TEACH
ONRUN
TIMER OFF
TEACH
TEACH
Object
Base
Teaching indicator ... Lit red
The built-in buzzer beeps once.
TEACH
Object
Base
Teaching indicator ... Lit red Lit green
The built-in buzzer beeps once.
Teaching indicator ... Lit red Flickers
red
The built-in buzzer beeps 3 times.
Change the object position and setting
distance again and make setting in order of
1 to 4.
TEACH
ONRUN
TIMER OFF
RUN
Teaching indicator ... Lit green Extin-
guished
L.ON
D.ON
One-point teaching
Pro
ce-
dur
e
Setting Operation
1Move the mode selector to the
position.
2
Press the teaching button with one of the
sensing objects or the background object
located under the sensor for sensing.
3
Move the mode selector to the po-
sition. 1-point teaching setting is complete
as soon as the first object passes.
4Select the desired operation format with
the operation mode selector (L.ON/D.ON).
TEACH
ONRUN
TIMER OFF
TEACH
Teaching indicator ... Lit red
The built-in buzzer beeps once.
TEACH
ONRUN
TIMER OFF
RUN
Teaching indicator ... Lit red Lit
green
L.ON
D.ON

A-204 Standard Photoelectric Sensors
Precautions
Fiber Units
Installation
Tightening Force
For the fiber unit installation, tighten it to the torque of 0.3 Nm
max.
Fiber Connection and Disconnection
E3X-NL amplifier has a push lock. Connect or disconnect the
fibers to or from E3X-NL amplifier using the following proce-
dures:
1. Connection
After inserting the fiber into the Amplifier, push the lock button
until a click sound is heard so that the fiber is securely con-
nected.
2. Disconnection
Ensure to press the push lock again to unlock before pulling
out the fiber, otherwise the fiber may be deteriorated.
(To maintain the fiber characteristics, remove the fiber after
making sure that the lock has been released.)
3. The fiber must be locked or released in a temperature
range of -10° to 40°.
Since face-to-face isntallation of the fiber units may cause
mutual interference, mount them so that the optical axes of
the sensors are not opposed.
Monting the sensor
If two or more sensors are used, face-to-face installation of
the fiber units or the regularly reflected light from the sensing
object may cause mutual interference. At this time, adjust the
fiber units to be mounted at the angles where the light of each
sensor is not received by the fiber unit of the other sensor.
●For adjustment
Two-point Teaching and One-point Teaching
Refer to the following information to select the most suitable
sensitivity setting method for the application.
Selection of Teaching Point(s)
Two-point Teaching
If E3X-NL is used to sense sensing objects that are only a little
different in glossiness from the background object and the
sensing objects have color patterns, the difference in glossi-
ness among the inks on the sensing objects may influence the
sensing operation of E3X-NL. Therefore perform two-point
teaching with E3X-NL at a place where E3X-NL can sense the
sensing objects smoothly while considering the characteris-
tics of glossiness versus distance of E3X-NL if the sensing po-
sition of each of the sensing objects is different from each
other.
One-point Teaching
If E3X-NL is used to sense sensing objects different from
each other in glossiness on a single background object, per-
form one-point teaching with E3X-NL using the background
object. If E3X-NL is used to sense identical sensing objects on
a variety of glossy background objects, perform one-point
teaching with E3X-NL using one of the sensing objects.
Operation Level Setting and Control Output for One-point Teaching
Correct Use
Lock button
Fiber insertion mark
Lock button
Locked Unlocked
Sensitivity
setting method Two-point teaching One-point teaching
Difference
In general, use 2-point teach-
ing. The fuzzy teaching func-
tion (refer to Technical Guide)
is activated to set the optimum
algorithms automatically,
drawing an operation level just
about between the two points
taught.
One-point teaching should
be performed for the sens-
ing of different objects on a
single background object or
a single type of objects on a
variety of glossy back-
ground objects.
The operating level will be
set 15% above or below the
teaching point, depending
on the glossiness of the first
sensing object.
The fuzzy teaching function
is not activated for 1-point
Vth selection
+ 15%
- 15%
Teaching
ON
Glossiness
OFF
Control output
(L·ON)
Glossiness
Control output
(L·ON)
TEACH mode RUN mode
Vth on
upper side
Vth on
lower side
Vth selection
+ 15%
- 15%
Teaching
ON
OFF
TEACH mode RUN mode
Vth on
upper side
Vth on
lower side

A-205E3X-NL
E3X-NL
Remote teaching function
In remote teaching, the remote RUN/TEACH input signal is
used for teaching instead of the mode selector and the remote
teaching input signal is used instead of the teaching button.
Miscellaneous
EEPROM Write Error
If a write error occurs (buzzer beeps, red and green teaching
indicators flicker at the same time, operation and stability indi-
cators flicker) due to power-off, static electricity or other noise
in the teaching mode (until the initial operation level compen-
sation completion of teaching without object), perform teach-
ing again with the unit button.
Note: If a memory error occurs, the red and green teaching indicators flicker at
the same time and the stability indicator flickers, unlike the teaching error.
Pro-
ce-
dure
Operation
1Set the mode selector to .
2
The following signal conditions must be given as remote
teaching input conditions.
AIf there is a teaching error after performing remote two-
point teaching with E3X-NL, try performing remote two-
point teaching again. If the remote RUN/TEACH input is
set from L to H after the teaching error, the thresholds set
with E3X-NL will not be refreshed.
BWhen remote teaching is not performed, cut the pink and
purple wires at the root of the cable or connect them to the
+ side (+V) of the power supply, and cut the orange wire
at the root of the cable or connect it to GND (0 V).
CAbout 1 s after remote teaching is over, the Sensor is
made ready to detect an object.
RUN
Brown +V
Blue 0V
Black Control output
Orange Answer-back output
Purple Remote teaching input
Pink Remote
RUN/TEACH input
T2 * 1.0 to 1.3s 1.0 to 1.3sT1 T1
T2
T1 *
* Note: T1 must be 20 ms minimum and T2 must be 500 ms minimum at the time of remote
teaching.
0.5s 0.5s
0.5s 0.5s 0.5s 0.5s
0.1s0.1s
H
L
H
L
H
L
H
L
Remote
RUN/TEACH input
Remote
teaching input
Answer-back output
(If teaching is OK.)
Answer-back output
(If teaching is NG.)
T2 *1.0 to 1.3s T1
T1 *
0.5s
H
L
H
L
H
L
Remote
RUN/TEACH input
Remote
teaching input
Answer-back output
(Remote 1-point teaching)
(Remote 2-point teaching)

A-206 Standard Photoelectric Sensors
Dimensions (Unit: mm)
Sensors
Accessories (Order Separately)
H-5
Amplifier Units
E3X-NL11
Two, mounting holes
Operation
indicator Stability indicator
24.9
32.2
33
4.1 22.4 16
±
0.2
59 6.2
22.4
5.4
16
±
0.2
3.4
13 34.8
3.8
32.5
6.1
Three,
2.5 dia.
8
10.7
74.15
Two, 3.2 dia. mounting holes Stainless steel (SUS304)
10.8
10
8.3
2-M3
16
±
0.2
(A) *
* Mounting brackets can be used on the A side.
Vinyl-insulated round cable of
4 dia. 6 cores conductor
cross-sectional area:
0.3
mm² ; insulation diameter:
1.04 mm Standard length: 2 m
Mounting Holes
With Mounting Blanket Attached
Short-distance, small spot type
E32-S15-#
16.5
wo, 3.3 dia. mounting holes
Optical fiber 6 dia. Sleeve
Window
Emitter
Receiver
Sensing surface
(8 x15.6)
29
9.2 13.2 Sensing head
13.2±0.2
2-M3
29
31 13
15 x 15
7
8
10
10.4
500 mm (E32-S15-1)
1 m (E32-S15-2)
Mounting Holes
Fiber Units
Long-distance type
E32-S15L-#
15 x 15
31 13
7
8
Window Two, 3.3 dia. mounting holes
Emitter
Receiver
Sensing surface (18 x35)
20.4
20
47
22
Sensing head
15.3
21.5
9.5
42
2-M3
22
±0.2
Optical fiber 6 dia.
Sleeve
500 mm (E32-S15L-1)
1 m (E32-S15L-2)
Mounting Holes
Fiber Units
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. E248-E2-02-X