2
E3S-LSE3S-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
■ Fast, 1 ms max. response time
■ Light-on/dark-on operation wire
selectable
■ Choose NPN and PNP output models
■ Ready-to-use: pre-leaded with 2 m
(6.56 ft) cable and includes mounting
bracket
Background Suppression Sensor E3S-LS
Ordering Information
■ TYPICAL APPLICATIONS
Inspecting bottles for cap presence Inspecting products in wrapped packages
Method of detection Pinpoint focusable diffuse reflective Area focusable diffuse reflective
Sensing distance 3 to 10 cm (1.18 to 3.94 in) 5 to 25 cm (1.97 to 9.84 in)
Part number NPN output E3S-LS10XE4 E3S-LS20XE4
PNP output E3S-LS10XB4 E3S-LS20XB4
■ SENSORS
■ REPLACEMENT PARTS
Description Part number
Mounting bracket (supplied with each sensor) E39-L5
Sensitivity adjuster knob (supplied with each sensor) E39-G1
Alignment aid (supplied with E3S-LS10X■4E39-L78
3
E3S-LSE3S-LS
Specifications
Part number E3S-LS10X■4 E3S-LS20X■4
Method of detection Pinpoint focusable diffuse Area focusable diffuse
reflective, narrow visibility reflective, wide visibility
Supply voltage 12 to 24 VDC
Current consumption 40 mA max.
Sensing distance Adjustable, 3 to 10 cm Adjustable, 5 to 25 cm
(1.18 to 3.94 in) with (1.97 to 9.84 in) with
1 x 1 cm (0.39 x 0.39 in) 7.5 x 7.5 cm (2.95 x 2.95 in)
90% reflectance white mat paper 90% reflectance white mat paper
Minimum detectable object 0.6 mm (0.024 in) minimum diameter 10 mm (0.39 in) minimum diameter
Light source Pulse modulated red LED Pulse modulated infrared LED
Detectable object type Opaque and transparent materials
Sensitivity Adjustable
Mutual interference protection Provided
Control DC Type NPN-SPST open collector with constant current source (E3S-LS■0XE4)
output solid- PNP-SPST open collector (E3S-LS■0XB4)
state Max. load NPN type: Load (relay, sink) logic: 80 mA
Voltage (source) logic: 1.5 to 3 mA
PNP type: Load (relay, source) logic: 100 mA
Max. on-state 1 VDC
voltage drop
Response time On 1 ms max.
Off 1 ms max.
Circuit Output short- Provided
protection circuit
DC power supply Provided
reverse polarity
Indicators Light Incident (red LED), Output Stability (green LED)
Materials Lens Plastic
Case Diecast zinc
Cable sheath Plastic
Mounting Side mounting with two through holes; Bracket E39-L5 and hardware included
Connections Prewired 3-conductor cable, 2 m (6.56 ft) length
Weight 225 g (7.94 oz.)
Enclosure ratings UL —
NEMA 1, 4, 4X, 12 13
IEC 144 IP67
Approvals UL —
CSA —
Ambient Operating -25° to 55°C (-13° to 131°F)
temperature Storage -40° to 70°C (-40° to 158°F)
■ OUTPUT CIRCUIT DIAGRAMS
PNP output
NPN output
Note: IEC colors are shown in parentheses.
Voltage
logic
(source)
Photoelectric
sensor switch
Load
(relay
sink)
Red (Brown)
White
(Black)
Black
(Blue)
+V
0 V
Light-ON Dark-ON
mode mode
+12 to 0 V
24 VDC
0 V +12 to
24 VDC
Photoelectric
sensor switch 0 V
Load
(relay)
(source)
Red (Brown)
White
(Black)
Black
(Blue)
Light-ON Dark-ON
mode mode
+12 to 0 V
24 VDC
0 V +12 to
24 VDC
2.2 Ω
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E3S-LSE3S-LS
■ EXCESS GAIN RATIO
Engineering Data
E3S-LS10X■4E3S-LS20X■4
Excess gain ratio
Excess gain ratio
Detecting distance [cm (inch)]
with 1 cm x 1 cm (0.39 x 0.39 in)
90% reflectance mat paper,
at maximum sensitivity
Detecting distance [cm (inch)]
with 7.5 cm x 7.5 cm (2.95 x 2.95 in)
90% reflectance mat paper,
at maximum sensitivity
(3.9) (7.9) (11.8) (15.7) (19.7) (23.6)
(1.97) (3.94) (5.91) (7.87) (9.84) (11.81)
■ DETECTING DISTANCE vs.
MINIMUM TARGET SIZE
(at maximum sensitivity)
E3S-LS20X■4
■ OPERATING RANGE
Length of short side of object [cm (inch)]
Detecting distance [cm (inch)]
5 10 15
(1.97) (3.94) (5.91)
3
(0.12)
2
(0.08)
1
(0.04)
0
1
(0.04)
2
(0.08)
3
(0.12)
10 20 30
(3.94) (7.87) (11.81)
Detecting distance [cm (inch)]
with 7.5 cm x 7.5 cm (2.95 x 2.95 in)
90% reflectance mat paper,
at maximum sensitivity
E3S-LS20X■4, Maximum Distance
E3S-LS20X■4, Minimum Distance
Detecting distance [cm (inch)]
with 7.5 cm x 7.5 cm (2.95 x 2.95 in)
90% reflectance mat paper,
at maximum sensitivity
Parallel offset distance Y (mm)
15
(0.59)
10
(0.39)
5
(0.20)
0
5
(0.20)
10
(0.39)
15
(0.59)
10 20 30
(3.94) (7.87) (11.81)
Detecting distance [cm (inch)]
with 5 cm x 5 cm (2 x 2 in)
90% reflectance mat paper,
at maximum sensitivity
E3S-LS10X■4
3
(0.12)
2
(0.08)
1
(0.04)
0
1
(0.04)
2
(0.08)
3
(0.12) 4 8 12 16
(1.58) (3.15) (4.72) (6.30)
E3S-LS10X■4, Minimum Object Sizes
Operating distance (cm)
Iron wireCopper wire
White mat
paper
Copper
wire
White mat paper
0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50
Width of detectable object (mm)
Iron wire
10
3
50
(19.7)
40
(15.7)
30
(11.8)
20
(7.9)
10
(3.9)
Parallel offset distance Y (mm)
Parallel offset distance Y (mm)
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E3S-LSE3S-LS
Dimensions
Unit: mm (inch)
■ SENSORS
E3S-LS10X■4, E3S-LS20X■4Mounting holes
*Mounting bracket E39-L5 may be attached
to surface "A".
■ SENSITIVITY ADJUSTER KNOB E39-G1 (included)
■ ALIGNMENT AID E39-L78 (supplied with E3S-LS10X
4)
Note: Ridge on the top
surface of the alignment
aid - fits into the
alignment groove on the
sensor.
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E3S-LSE3S-LS
Setting sequence Step 1: Finding point A Step 2: Finding point B Step 3: Final setting
Detecting
condition
Sensitivity
adjustment
position
Adjustment Turn the sensitivity adjuster fully Remove the object to be detected, Set the sensitivity adjuster
procedure counterclockwise to the Minimum then turn the sensitivity adjuster fully between reference points
Setting. Place the object to be clockwise to the Maximum setting. "A" and "B". Confirm that
detected in position, then turn the Turn the sensitivity adjuster slowly the STABILITY indicator
sensitivity adjuster slowly clockwise counterclockwise until the LIGHT lights when the object to be
until the LIGHT INCIDENT indicator INCIDENT indicator goes off. This is detected is in place and
lights. This is reference point "A". reference point "B". If the indicator when removed from its
is off at maximum setting, use the specified position.
maximum setting as reference
point "B".
Operation
■ DETECTING DISTANCE ADJUSTMENT
Select the proper detecting distance
adjustment method based on the
conditions listed in the table. Method #2
assumes the amplifier is wired for DARK-
ON operation mode.
Conditions The reflection factor of the The reflection factor of the
object to be detected is object to be detected is
equal to, or higher than, that less than that of the
of the background object. background object.
Adjustment method Use Method 1. Use Method 2.
Adjustment Method 1 Adjustment Method 2
1. Set sensitivity adjuster to center position.
2. Turn the distance adjusting knob fully counterclockwise,
for as many turns as necessary, to reach the shortest
distance setting "S".
3. Place the object to be detected in position.
4. Turn the distance adjusting knob slowly clockwise, from
shortest distance setting "S" toward longest distance
setting "L". Stop turning the knob when both
LIGHT INCIDENT and STABILITY indicators light. This is
the proper distance setting.
5. Next, adjust the sensitivity.
1. Set sensitivity adjuster to center position.
2. Turn the distance adjusting knob fully counterclockwise,
for as many turns as necessary, to reach the longest
distance setting "L".
3. Remove the object to be detected, if present.
4. Turn the distance adjusting knob slowly clockwise, from
longest distance setting "L" toward the shortest distance
setting "S". Watch for the following combination of
indicators to light:
E3S-LS10: Stop turning the knob when both LIGHT
INCIDENT and STABILITY indicators light.
E3S-LS20: Stop turning the knob just before the
STABILITY indicator goes out while the
LIGHT INCIDENT indicator is lit.
5. Next, adjust the sensitivity.
Distance adjusting knob
Detected
object
Background
object
■ SENSITIVITY ADJUSTMENT
E3S-LSE3S-LS
■ ALIGNMENT AID E39-L78
The alignment aid can be used to help in setting the detecting distance with E3S-LS10X4.
Example: Follow these steps to set the sensor for detecting an object at 5 cm:
1. Follow the ridge of the alignment into the groove of the sensor. (Refer to the drawing in
Dimensions
).
2. Match the line indicating 5 on the alignment aid to the 5 on the back of the sensor (5=5 cm).
3. Starting from the most counterclockwise position, turn the distance adjusting knob clockwise until the indicator mark is in the
center of the alignment aid.
OMRON ELECTRONICS LLC OMRON CANADA, INC.
One East Commerce Drive 885 Milner Avenue
Schaumburg, IL 60173 Scarborough, Ontario M1B 5V8
1-800-55-OMRON 416-286-6465
Cat. No. CEDSAX4 11/01 Specifications subject to change without notice. Printed in the U.S.A.
OMRON ON-LINE
Global - http://www.omron.com
USA - http://www.omron.com/oei
Canada - http://www.omron.com/oci
