Distance-settable Photoelectric Sensor E3Z-LS 1
Distance-settable Photoelectric Sensor
E3Z-LS
Selectable Foreground/Background
Suppression Photoelectric Sensor
• Stable sensing regardless of target’s color or size.
• Adjustable sensing distance.
• Unique Algorithm minimizes external interference from
fluorescent lighting.
• Visible light ensures easy alignment.
• Available in pre-wired or connector-ready configuration.
Ordering Information
■Sensors
■Accessories (Order Separately)
Sensor I/O Connectors
Sensing
method
(selectable)
Appearance Connection
method
Sensing distance (white paper) Model
NPN output PNP output
BGS/FGS
diffuse
Pre-wired (2-m
cable)
E3Z-LS61 E3Z-LS81
M8 Connector E3Z-LS66 E3Z-LS86
40 mm20 mm 200 mm
BGS (at min. setting)
BGS (at max. setting)
FGS (at min. setting)
FGS (at max. setting)
Incident light level
threshold (fixed)
Cable
specification
Appearance Cable type Model
Standard M8
cable
2 m 4-wire XS3F-M421-402-A
5 m XS3F-M421-405-A
2 m XS3F-M422-402-A
5 m XS3F-M422-405-A
Straight
L-shaped
2Distance-settable Photoelectric Sensor E3Z-LS
Mounting Brackets (Same for Entire E3Z Series)
Appearance Qty Remarks Model Appearance Qty Remarks Model
1 Mounting Bracket E39-L153 1 set Sensor Adjusters
For easy mounting and adjust-
ment with aluminum frames and
rails, such as those on
conveyors
For horizontal adjustment
E39-L150
1E39-L104
1 Horizontal
Mounting Bracket
E39-L43 1 set E39-L151
1 Horizontal
Protective Cover/
Mounting Bracket
E39-L142
1 Rear-connecting
Mounting Bracket
E39-L44
1Protective Cover/
Mounting Bracket
E39-L98 1 set Compact Protective Cover/
Mounting Bracket (for E3Z only)
E39-L144
Distance-settable Photoelectric Sensor E3Z-LS 3
Specifications
■Ratings/Characteristics
Note: The sensing range of an object that has reflectivity that is similar to a white paper can be adjusted from 40 to 200 mm. The sensing range
of an object that has reflectivity that is similar to a black paper can be adjusted from 40 to 160 mm.
Sensing method Distance-settable
Item NPN output E3Z-LS61 E3Z-LS66
PNP output E3Z-LS81 E3Z-LS86
Sensing distance
(see Operation)
BGS White or black paper (100 x 100 mm): 20 mm to 200 mm
FGS White paper (100 x 100 mm): 40 mm to 200 mm
Black paper (100 x 100 mm): 40 mm to 160 mm
Adjustable sensing range (see note) White paper (100 x 100 mm): 40 to 200 mm
Black paper (100 x 100 mm): 40 to 160 mm
Hysteresis (Refer to the “Hysteresis vs. Sensing Distance” graph in the Engineering section of this data sheet.)
Reflectivity characteristic
(black/white error)
10% of set distance max.
Light source (wavelength) Red LED (680 nm)
Power supply voltage 12 to 24 VDC ±10%, ripple (p-p) 10% max.
Current consumption 30 mA max.
Control output Load power supply voltage 26.4 VDC max., load current 100 mA max. (residual voltage 1 V max.) Open
collector output (NPN or PNP depending on model)
Light-ON/Dark-ON switch selectable
BGS/FGS selection
(wire selectable)
BGS: Open or connected to GND
FGS: Connected to Vcc
(See Operation)
Protective circuits Reverse polarity protection, output short-circuit protection, mutual interference prevention
Response time Operation or reset: 1 ms max.
Distance setting 5-turn adjuster
Ambient illumination Incandescent lamp: 3,000 lx max.; Sunlight: 10,000 lx max.
Ambient temperature Operating: −25 to 55°C, Storage: −40 to 70°C (with no icing or condensation)
Ambient humidity Operating: 35% to 85%, Storage: 35% to 95% (with no condensation)
Insulation resistance 20 MΩ min. at 500 VDC
Dielectric strength 1,000 VAC at 50/60 Hz for 1 minute
Vibration resistance (destruction) 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance (destruction) 500 m/s2 for 3 times each in X, Y, and Z directions
Degree of protection IEC 60529 IP67
Connection method Pre-wired (standard length: 2 m/0.5 m) M8 connector
Indicators Operation indicator (orange), stability indicator (green)
Weight (packed state) Pre-wired Sensors, 2 m: Approx. 65 g Approx. 20 g
Material Case PBT (polybutylene terephthalate)
Lens Denaturated polyallylate
Accessories Instruction sheet (Mounting Brackets must be purchased separately.)
4Distance-settable Photoelectric Sensor E3Z-LS
Principle of Operation
■Background Suppression
Background Suppression: Objects beyond the set distance will not
be detected.
To ensure reliable background suppression, a minimum separation
distance between the set distance and the background is recom-
mended. Please refer to the “Hysteresis vs. Sensing Distance” graph
in the Engineering section of this data sheet to determine the mini-
mum separation distance.
Example: A target that has a reflectivity that is similar to a black
paper is set to a maximum set distance of 160 mm. Based on the
“Hysteresis vs. Sensing Distance” graph, the hysteresis is 5%. The
recommended minimum separation distance in this case is 8.0 mm
(5% of 160 mm) between the background and the set distance. This
means that the background must be at least 8.0 mm behind the set
distance.
Background Suppression Optical Configuration
■Foreground Suppression
Foreground suppression: Objects in front of the set distance will
not be detected.
Objects with glossy or irregular surface often reflect the light emitted
from the sensor in different directions. This phenomenon often leads
to false detection. For such objects, a foreground suppression sensor
(FGS) or a polarized retro-reflective sensor is the sensor of choice.
For applications that do not have space for a reflector, the FGS is
ideal.
FGS sensors accomplish reliable detection by not detecting the
object directly. An FGS sensor uses a background, as a retro-reflec-
tive sensor would use a reflector, to reliably detect any object that
passes between itself and the background. FGS uses the position on
which the light reflected from the background strikes its receiver as a
point of reference (see the diagram at right.) A change in switching
state occurs when the light strikes the receiver at a different position.
Any object that passes between the sensor and the background will
reflect the light onto the receiver in a position that will be different
from the point of reference (reflection from the background).
To ensure reliable foreground suppression, a minimum separation
distance between the set distance and the background as well as a
minimum separation distance from the target to the set distance is
recommended. Please refer to the “Hysteresis vs. Sensing Distance”
graph in the Engineering section of this data sheet to determine the
minimum separation distance.
Example: A target that has a reflectivity that is similar to a black
paper is set to a maximum set distance of 160 mm. Based on the
“Hysteresis vs. Sensing Distance” graph, the hysteresis is 5%. The
recommended minimum separation distance in this case is 8.0 mm
(5% of 160 mm) between the background and the set distance, and
8.0 mm between the set distance and the background. This means
that the background must be at least 8.0 mm behind the set distance,
and the set distance must be at least 8.0 mm behind the target.
Foreground Suppression Optical Configuration
Near
Far
Emitter
Emittin
g
Len
s
Receiving
Lens
Ta r
g
et
A
Back
g
roun
d
S
et Distanc
e
8 mm
Separation
Di
s
t
a
n
ce
Near
Far
Emitter
Emittin
g
Len
s
Receiving
Lens
Ta r
g
et
A
Back
g
roun
d
Set Distance
8 mm
Separation
Di
s
t
a
n
ce
Se
p
aration
Distance
8
m
m
160 mm
Distance-settable Photoelectric Sensor E3Z-LS 5
Operation
Note: The VERY FAR region is supported only for FGS. The incident
light level threshold is fixed and cannot be set.
■NPN Output
NEAR FAR VERY FAR
BGS
FGS
Distance threshold
(set distance)
Incident light level
threshold (not settable)
Only for FGS
mode
Model Output
transis-
tor
status
Timing chart Mode
selec-
tion
switch
BGS/FGS
selection
method
Output circuit
E3Z-LS61
E3Z-LS66
Light ON L side
(L/ON)
BGS:
Either
leave the
pink wire
(2) open or
connect it
to the blue
wire (3).
Dark ON D side
(D/ON)
Light ON L side
(L/ON)
FGS:
Connect
the pink
wire (2) to
the brown
wire (1).
Dark ON D side
(D/ON)
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay) (Between brown and black)
1
24
3
4
2
1
30 V
ZD
Operation
indicator
(orange)
Stability
indicator
(green)
Main
circuit (Control
output)
Brown
Black
Pink
Blue
FGS
100 mA
max.
12 to 24 VDC
Load (relay)
BGS
Connector Pin Arrangement
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay) (Between brown and black)
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
VERY FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay) (Between brown and black)
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
VERY FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay)
(Between brown and black)
6Distance-settable Photoelectric Sensor E3Z-LS
■PNP Output
■Connectors (Sensor I/O Connectors)
Model Output
transis-
tor
status
Timing chart Mode
selec-
tion
switch
BGS/FGS
selection
method
Output circuit
E3Z-LS81
E3Z-LS86
Light ON L side
(L/ON)
BGS:
Either
leave the
pink wire
(2) open or
connect it
to the blue
wire (3).
Dark ON D side
(D/ON)
Light ON L side
(L/ON)
FGS:
Connect
the pink
wire (2) to
the brown
wire (1).
Dark ON D side
(D/ON)
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay)
(Between blue and black)
4
1
24
3
1
2
30 V
ZD
Operation
indicator
(orange)
Stability
indicator
(green)
Main
circuit
(Control
output)
100 mA
max.
FGS
12 to 24 VDC
BGS
Connector Pin Arrangement
Brown
Pink
Black
Blue
Load (relay)
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay) (Between blue and black)
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
VERY FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay)
(Between blue and black)
ON
OFF
ON
OFF
ON
OFF
NEAR FAR
VERY FAR
Operation
indicator
(orange)
Output
transistor
Load (e.g.,
relay)
(Between blue and black)
2
4
1
3
1
2
3
4
XS3F-M421-402-A
XS3F-M421-405-A
XS3F-M422-402-A
XS3F-M422-405-A
Cable core wire
jacket color
Brown
White
Blue
Black
Class Wire jacket
color
Connector
pin No.
Application
For DC Brown APower supply (+V)
White BBGS/FGS
selection
Blue CPower supply
(0 V)
Black DOutput
Distance-settable Photoelectric Sensor E3Z-LS 7
Engineering Data
8
6
4
2
0
−2
−4
−6
−8
50 100 150 200 250
X
Y
Set distance: 40 mm, 200 mm
Sensing object: White paper,
100 x 100 mm
200-mm setting
40-mm setting
Distance X (mm)
20
18
16
14
12
10
8
6
4
2
030025020015010050
−40 −30 −20 −10 0 10 20 30
−θ
+θ
20
15
10
5
0
−5
−10
−15
−20
40
Set distance: 40 mm, 200 mm
Sensing object: White paper,
100 mm x 100 mm
200-mm set distance
40-mm set distance
Vertical
Sensing
object Center
line
Inclination
−θ
+θ
Center
line
20
15
10
−
−10
−15
−20
−40 −30 −20 −100 10203040
200-mm set distance
200
-mm set distanc
e
Sensing
object
−θ
Set distance: 40 mm, 200 mm
Sensing object: White paper,
100 mm x 100 mm
40-mm set distance
d
40
-mm
se
t
dis
t
a
n
c
Inclination
n
c
lin
a
ti
on
+θ
250
200
150
100
50
0
Set distance: 40 mm
Set distance: 200 mm
40 mm
0 mm 9 mm
199 mm 185 mm
4 mm
36 mm
800
700
600
500
400
300
200
100
300250200150100500
800
700
600
500
400
300
200
100
300250200150100500
10
9
8
7
6
5
4
3
2
1
25020015010050
0
White paper
Black paper
50
40
30
20
10
0
240
200
160
120
80
40
0
20
15
10
5
0
−5
−10
−15
−20
200 400 600 800
X
Y
40-mm set distance
200-mm set distance
Distance X (mm)
Set distance: 40 mm, 200 mm
Sensing object: White paper,
100 mm x 100 mm
Operating Range
BGS FGS
Spot Diameter vs. Sensing
Distance
Inclination Characteristics
Vertical Horizontal
Black Paper
Short-distance Characteristic
Sensing Distance vs. Material
At Set Distance of 40 mm At Set Distance of 200 mm
Hysteresis vs.
Sensing Distance
FGS Mode Set Distance vs.
Sensing Range
White Paper
Operating range Y (mm)
Operating range Y (mm)
Spot diameter (mm)
Sensing distance (mm)
Sensing distance (mm)
Material
Rate of sensing distance change (%)
Inclination θ (°)
Rate of sensing distance change (%)
Inclination θ (°) White
paper
White
paper
Black
paper
Black
paper
Sensing range (mm)
Set distance (mm)
Sensing range (mm)
Set distance (mm)
Hysteresis differential (%)
Sensing distance (mm)
Sensing distance (mm)
Material
Sensing distance (mm)
Material
White
paper
Veneer Black
rubber
Card-
board
Black
paper
SUS Mirror
surface
White
paper
Veneer Black
rubber
Card-
board
Black
paper
SUS Mirror
surface
8Distance-settable Photoelectric Sensor E3Z-LS
Nomenclature
Dimensions
Unit: mm (inch)
Set distance adjuster
(5-turn adjustment)
Operation indicator
(orange)
Operation selector
Stability indicator
(green)
4.3
8
12.7
20
(0.79)
10.8 (0.43) 10.4
17
31
(1.22)
18 4
4
25.4
2.1
13.5
4.3
8
12.7
20
(1.79)
10.8 (0.43) 10.4
17
31
(1.22)
10.4
18 4
4
25.4
2.1
13.5
9.75
Pre-wired Sensors
E3Z-LS61
E3Z-LS81
Sensors with M8 Connectors
E3Z-LS66
E3Z-LS86
Two, M 3
4-dia., 4-core vinyl-insulated round cable
(conductor cross-sectional area: 0.2 mm2;
insulation diameter: 1.1 mm)
Standard length: 2 m/0.5 m
Operation indicator
(orange)
Stability indicator (green)
Operation selector
2 lenses (7 dia.)
Receiver
Optical axis
Emitter
Operation indicator
(orange)
Stability indicator (green)
Operation selector
2 lenses (7 dia.)
Receiver
Optical axis
Emitter
Connector M8
Set distance adjuster Set distance adjuster
Two, M 3
Distance-settable Photoelectric Sensor E3Z-LS 9
Precautions
!Caution
Do not connect an AC power supply to the Sensor. If AC power
(100 VAC or more) is supplied to the Sensor, it may explode or
burn.
Be sure to abide by the following precautions for the safe operation of
the Sensor.
Wiring
Power Supply Voltage and Output Load
Power Supply Voltage
Make sure that the power supply to the Sensor is within the rated
voltage range. If a voltage exceeding the rated voltage range is sup-
plied to the Sensor, it may explode or burn.
Load Short-circuiting
Do not short-circuit the load, otherwise the Sensor may be damaged.
Connection without Load
Do not connect the power supply to the Sensor with no load con-
nected, otherwise the internal elements may explode or burn.
Operating Environment
Do not use the Sensor in locations with explosive or flammable gas.
■Correct Use
Design
Power Reset Time
The Sensor is ready to operate 100 ms after the Sensor is turned
ON. If the load and Sensor are connected to independent power sup-
plies respectively, be sure to turn ON the Sensor before supplying
power to the load.
Wiring
Avoiding Malfunctions
If using the Photoelectric Sensor with an inverter or servomotor,
always ground the FG (frame ground) and G (ground) terminals, oth-
erwise the Sensor may malfunction.
Mounting
Mounting the Sensor
•If Sensors are mounted face-to-face, make sure that the optical
axes are not in opposition to each other. Otherwise, mutual interfer-
ence may result.
•Always install the Sensor carefully so that the aperture angle range
of the Sensor will not cause it to be directly exposed to intensive
light, such as sunlight, fluorescent light, or incandescent light.
•Do not strike the Photoelectric Sensor with a hammer or any other
tool during the installation of the Sensor, or the Sensor will lose its
water-resistive properties.
•Use M3 screws to mount the Sensor.
•When mounting the case, make sure that the tightening torque
applied to each screw does not exceed 0.54 N·m.
M8 Connector
•Always turn OFF the power supply to the Sensor before connecting
or disconnecting the metal connector.
•Hold the connector cover to connect or disconnect it.
•Secure the connector cover by hand. Do not use pliers, otherwise
the connector may be damaged.
•If the connector is not connected securely, it may be disconnected
by vibration or the proper degree of protection of the Sensor may
not be maintained.
Mounting Directions
•Make sure that the sensing side of the Sensor is parallel with the
surface of the sensing objects. Normally, do not incline the Sensor
towards the sensing object.
If the sensing object has a glossy surface, however, incline the Sen-
sor by 5° to 10° as shown in the illustration, provided that the Sensor
is not influenced by background objects.
•If there is a mirror-like object below the Sensor, the Sensor may not
operate stably. Therefore, incline the Sensor or separate the Sen-
sor from the mirror-like object as shown below.
•Do not install the Sensor in the wrong direction. Refer to the follow-
ing illustration.
Sensing side
Surface of sensing object
Glossy object
Sensing object
Mirror-like object
Sensing
object
Moving direction
Moving direction Moving direction
Sensing
object
Sensing
object
10 Distance-settable Photoelectric Sensor E3Z-LS
Install the Sensor as shown in the following illustration if each sens-
ing object greatly differs in color or material.
Adjustments
Indicator Operation
Note: 1. If the stability indicator is lit, the detection/no detection sta-
tus is stable within the rated ambient operating temperature
(−25 to 55°C).
2. The VERY FAR region is supported only for FGS. The inci-
dent light threshold is fixed and cannot be set. The distance
to the incident light threshold depends on the color and
gloss of the sensing object’s surface.
Inspection and Maintenance
Cleaning
Never use paint thinners or other organic solvents to clean the sur-
face of the product.
Moving direction
Moving direction
Distance threshold
(settable)
Incident light level threshold
(not settable)
Unstable
NEAR
Stable NEAR
BGS
Stability
(green)
Operation
(orange)
ON
OFF
Not sufficient incident
light margin
Slightly insufficient
incident light
Very insufficient
incident light
Unstable FAR
Stable FAR
NEAR region VERY NEAR
region
FAR region
L/ON
D/ON
FGS
Stability
(green)
Operation
(orange)
L/ON
D/ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Stability
(green)
Operation
(orange)
Stability
(green)
Operation
(orange)
(for FGS only)
11 Distance-settable Photoelectric Sensor E3Z-LS
E3Z Series
■Complete E3Z Series
Note: 1. The sensing distance is for when an E39-R1S Reflector is used. The minimum distance between the Reflector and Sensor is given in
parentheses.
2. For details, refer to the Sensing Products catalog (CEDSAX).
Sensing
method
Item
Distance-settable
(NEW)
Diffuse reflective Narrow-beam
diffuse reflective
Retroflective Retroflective for PET bottles Through-beam Grooved type
Appearance
Model E3Z-LS E3Z-D E3Z-L E3Z-R E3Z-B E3Z-T E3Z-G
Sensing
distance
20 mm to set dis-
tance (BGS mode)
Set distance to
200 mm min. (FGS
mode)
5 to 100 mm
(wide vision)
1 m 90 ±30 mm 4 m (100 mm)
(See note 1.)
500 mm
(80 mm)
(See note 1.)
2 m
(500 mm)
(See note 1.)
15 m 10 m 25 mm
Light source
(wave-
length)
Red LED (680 nm) Infrared LED
(860 nm)
Red LED (670 nm) Red LED (680 nm) Infrared LED
(860 nm)
Red LED
(700 nm)
Infrared LED
(940 nm)
Power
supply
voltage
12 to 24 VDC ±10%, ripple (p-p) 10% max.
Current
consump-
tion
30 mA max. Emitter: 15 mA
Receiver: 20 mA
25 mA max.
Control
outputs
Load power supply voltage 26.4 VDC max., load current 100 mA max. (residual voltage 1 V max.)
Open collector output (NPN or PNP depending on model)
Light-ON/Dark-ON switch selectable
Protective
circuits
Reverse polarity protection, output short-circuit protection, mutual interference prevention (Mutual interference prevention is not provided on E3Z-T.)
Response
time
Operation or reset: 1 ms max.
Sensitivity
adjustment
5-turn endless ad-
juster
Single-turn adjuster ---
Ambient
temperature
Operating: −25 to 55°C, Storage: −40 to 70°C (with no icing or condensation)
Ambient
humidity
Operating: 35% to 85%, Storage: 35% to 95% (with no condensation)
Protective
structure
IEC 60529 IP67 IEC 60529 IP64
Connection
method
Pre-wired
(standard length:
2 m/0.5 m) or M8
connector
Pre-wired (standard
length: 2 m/0.5 m),
M8 connector, or M12
connector relay
(0.3 m)
Pre-wired
(standard length:
2 m/0.5 m) or M8
connector
Pre-wired (standard
length: 2 m/0.5 m),
M8 connector, or M12
connector relay (0.3 m)
Pre-wired (standard length:
2 m/0.5 m) or M8 connector
Pre-wired (standard length:
2 m/0.5 m), M8 connector, or
M12 connector relay (0.3 m,
infrared type only)
Pre-wired (standard
length: 2 m/0.5 m) or
M8 connector relay
(0.3 m)
12 Distance-settable Photoelectric Sensor E3Z-LS
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, divide by 25.4
Cat. No. E327-E3-1 Printed in USA
OMRON CANADA, INC.
885 Milner Avenue
Toronto, Ontario M1B 5V8
416-286-6465
OMRON ELECTRONICS LLC
One East Commerce Drive
Schaumburg, IL 60173
1-800-55-OMRON
OMRON ON-LINE
Global - http://www.omron.com
USA - http://www.omron.com/oei
Canada - http://www.omron.com/oci
08/02/7.5M Specifications subject to change without notice