1
Photoelectric Sensor E3S-LS
Focusable Sensors with Built-in DC
Amplifiers
Pinpoint focusable and area focusable models
eliminate background objects.
Ideal for precise detection of level/height, edges,
small holes and openings, objects touching one
another, objects inside transparent covers.
Ordering Information
Sensing method Sensing distance Model
NPN output PNP output
Area focusable reflective 5 to 25 cm (continuously variable) E3S-LS20XE4 E3S-LS20XB4
Pinpoint focusable reflective 3 to 10 cm (continuously variable) E3S-LS10XE4 E3S-LS10XB4
3 ±0.5 cm E3S-LS3C1D
E3S-LS3RC4
---
Application Examples
Sensing of objects utilizing
their difference in luster.
Sensing of objects traveling in
contiguous succession.
Sensing of small holes, narrow
openings, or unevenness.
Sensing of objects utilizing
their difference in luster.
Sensing of objects traveling in
contiguous succession.
Sensing of small holes, narrow
openings, or evenness.
É
É
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Pencils
E3S-LS10X
E3S-LS20X
Sensing distance Supply voltage Output
80 mA
100 mA
12 to 24 VDC
3 to 10 cm, 5 to 25 cm
E3S-LS E3S-LS
2
Specifications
Ratings/Characteristics
Item E3S-LS10Xj4 E3S-LS20Xj4E3S-LS3C1D E3S-LS3RC4
Power supply voltage 12 VDC –10% to 24 VDC +10%,
ripple (p-p): 10% max.
5 VDC –10% to
24 VDC +10%,
ripple (p-p): 10% max.
12 VDC –10% to
24 VDC +10%,
ripple (p-p): 10% max.
Current consumption 40 mA max.
Sensing distance 3 to 10 cm (variable
with distance
adjuster)
5 to 25 cm (variable
with distance
adjuster)
3±0.5 cm
Differential travel 0.5 mm max. at 3 cm
3 mm max. at 10 cm
5% max. ---
Standard objects 1 x 1 cm white mat
paper
5 x 7.5 cm white mat
paper
1 x 1 cm white mat paper
Control
output DC
solid-state Load Model with suffix -E4: 80 mA max.
Model with suffix -B4: 100 mA max.
30 mA max. 50 mA max.
ou pu
so dsae
Voltage
output 1.1 V max. at 80 mA 2 V max.
Response time (ON, OFF) 1 ms max. ON: 3 ms
OFF: 100 ms
1 ms max.
Sensitivity Adjustable --- Adjustable
Operation mode Wire-selectable (Refer to “Output Circuit.”) --- Wire-selectable
(Refer to “Output
Circuit.”)
Indicators Light indicator (red), stability indicator (green) Operation indicator
(red)
Light indicator (red)
Circuit protection Short circuit
Mutual interference protection Provided --- Provided
Enclosure rating IEC 144 IP67 IP40
NEMA 1, 3, 4X, 6, 12 ---
Housing material Metal Plastic
Light source Red LED Infrared LED Red LED
Ambient temperature Operating: –25 to 55 °COperating: –10 to 55 °C
E3S-LS E3S-LS
3
Engineering Data
Excess Gain Ratio
E3S-LS20XE4 E3S-LS10XE4 E3S-LS3RC4
Excess gain ratio
Sensing distance (cm)
Excess gain ratio
Sensing distance (cm)
Excess gain ratio
Sensing distance (cm)
Peak receiver
output at 3 cm
Peak receiver output at 5 cm
Peak receiver
output at 10 cm
Note: 1. Sensitivity adjustor: Set to MAX.
2. This graph shows the relationship between the
optical output and setting distance by adjusting
the sensitivity adjustor so that the optical output
will be maximum at a sensing distance of 3, 5, or
10 cm.
Operating
level
Standard sensing object
(white paper)
Standard sensing
object (black
carbon paper)
Operating
voltage
Setting
distance
Operating Range
E3S-LS20XE4 E3S-LS10XE4 E3S-LS3RC4
Operating position Y (mm)
Sensitivity
E3S-LS20XE4
Distance (cm)
Size of object (cm)
Operating position Y (mm)
Operating position Y (mm)
Distance: Max.
Distance X (cm)
Distance: Min.
Standard object
(5 x 57.5 cm)
(with minimum sensing distance)
Optical axis
Operating
distance x
Standard object
(1 ×1 cm)
Distance: 3 cm Distance: 10 cm
Sensing object
size: 10 x 10 mm
Setting distance (mm)
Short side
Long side
White mat paper
Object sensed
Ratio of short side to long side = 2:3
E3S-LS E3S-LS
4
Operation
Output Circuits
E3S-LS10X
-E4 Type (NPN Output) -B4 Type (PNP Output)
Main circuit
+V
Output
Brown
Black
Blue
Light-
ON Dark-
ON
Blue
Black
Brown
0 V
+V Brown
Black
Blue
Blue
Black
Brown
0 V
Output
2.2
Light-
ON Dark-
ON
Main circuit
E3S-LS20X
-E4 Type (NPN Output) -B4 Type (PNP Output)
+V
Output
Brown
Black
Blue
Light-
ON Dark-
ON
Blue
Black
Brown
0 V
+V Brown
Black
Blue
Light-
ON Dark-
ON
Blue
Black
Brown
0 V
Output
2.2
Main circuit Main circuit
E3S-LS3C1D
E3S-LS3RC4
Light-ON Dark-ON
Z
Brown
Black
Operation
indicator
(red)
Photoelectric
sensor main
circuit
Z: Zener diode (V2 = 30 V)
Blue
Brown
Black
OUT
Blue
Pink
Photoelectric
sensor main
circuit
Incident
indicator
(red)
Brown
Black
OUT
Photoelectric
sensor main
circuit
Incident
indicator
(red)
Blue
Pink
+V
OUT
0 V
+V
0 V
+V
0 V
E3S-LS E3S-LS
5
Timing Chart
E3S-LS10X
-E4 Type (NPN Output) -B4 Type (PNP Output)
Light
LIGHT
indicator
Output
transistor
Load
(relay, etc.)
Output voltage
(logic, etc.)
Incident
Interrupted
ON
OFF
Operates
Releases
H
L
ON
OFF
Light-ON Dark-ON
Light
LIGHT
indicator
Output
transistor
Load
(relay, etc.)
Incident
Interrupted
ON
OFF
Operates
Releases
ON
OFF
Light-ON Dark-ON
E3S-LS20X
-E4 Type (NPN Output) -B4 Type (PNP Output)
Light
LIGHT
indicator
Output
transistor
Load
(relay, etc.)
Output voltage
(logic, etc.)
Incident
Interrupted
ON
OFF
Operates
Releases
H
L
ON
OFF
Light-ON Dark-ON
Light
LIGHT
indicator
Output
transistor
Load
(relay, etc.)
Incident
Interrupted
ON
OFF
Operates
Releases
ON
OFF
Light-ON Dark-ON
E3S-LS3C1D E3S-LS3RC4
Sensing
object
Yes
No
Indicator ON
OFF
ON
OFF
Timer setting
Output
transistor
(load) 3 ms max.
< T (See note)
T (See note)
Note: Timer setting
T = 0.1 to 1 s
(Between brown and
black lines)
Light
LIGHT
indicator
Output
transistor
Load
(relay, etc.)
Incident
Interrupted
ON
OFF
Operates
Releases
ON
OFF
Light-ON Dark-ON
E3S-LS E3S-LS
6
Dimensions
Note: All units are in millimeters unless otherwise indicated.
E3S-LS10Xj4
E3S-LS20Xj4
Cord: 4-mm dia., 18/0.12, 3-conductor
Standard length: 2 m
Weight: approx. 225 g
Note: A mounting bracket can be attached to side A.
Sensitivity
adjustor
Distance adjustor
8 dia.
Indicator
Emitter
Receiver
Two, M4 slotted
hexagonal bolts Lens (14 x 47)
(A) (See note)
Optical axis
Two 4.4 dia.
holes
Two, M 4 holes
20
Mounting Holes
E3S-LS3C1D
E3S-LS3RC4
Cord: 4-mm dia., 18/0.12, 3-conductor
Standard length: 2 m
Weight: approx. 60 g
Indicator
E3S-LS3C1D Timer Volume
E3S-LS3RC4 Sensitivity Adjustor
8 dia.
Optical axis
Optical axis
Two, M3 holes
E3S-LS E3S-LS
7
Precautions
Sensing Distance Adjustment
E3S-LS10XE4
Adjustment Method
1. Set the pointer of the sensitivity adjuster to the center of its
revolution range.
2. Turn the distance adjuster fully counterclockwise to the “S”
position.
3. Set the sensing object in position.
4. Turn the distance adjuster gradually clockwise to a point
where both the LIGHT and STABILITY indicators light. Fix the
distance adjuster at that point.
5. Adjust sensitivity.
É
É
É
É
É
É
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Distance adjuster
Object sensed
Background object
E3S-LS20XE4
Adjustment Method 1
When the quantity of light reflected from the object is greater than
that from the background object, adjust the sensing distance in the
following sequence:
1. Set the pointer of the sensitivity adjuster to the center of its
revolution range.
2. Turn the distance adjuster fully counterclockwise to the “S”
position.
3. Set the sensing object in position.
4. Turn the distance adjuster gradually clockwise to a point
where both the LIGHT and STABILITY indicators light. Fix the
distance adjuster at that point.
5. Adjust sensitivity.
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
Distance adjuster
Object sensed
Background object
Adjustment Method 2
When the quantity of light reflected from the object is greater than
that from the background object, adjust the sensing distance in the
following sequence:
1. Set the pointer of the sensitivity adjuster to the center of its
revolution range.
2. Turn the distance adjuster fully counterclockwise to the “L”
position.
3. Remove the sending object.
4. Turn the distance adjuster gradually clockwise to a point
where both the LIGHT and STABILITY indicators light. Fix the
distance adjuster at that point.
5. Adjust sensitivity.
2007.3
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2007 All Rights Reserved.
In the interest of product improvement, specifications are subject to change without notice.
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comments.
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The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible
uses of the products, nor is it intended to imply that the uses listed may be suitable for the products:
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CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons.
It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made.
However, some specications of the product may be changed without any notice. When in doubt, special model numbers may be assigned to fix
or establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual
specifications of purchased product.
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Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.
ERRORS AND OMISSIONS
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typographical, or proofreading errors, or omissions.
PERFORMANCE DATA
Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent
the result of OMRON’s test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON
Warranty and Limitations of Liability.
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Cat. No. E39-E1-3