1
Ultrasonic Proximity Sensor E4B
Capable of Setting the Sensing Range
Using an Ultrasonic Beam
Ensures
the
stable detection of a variety of objects
regardless of the color, transparency, or material
(metallic or non-metallic) of the objects.
Limits the ultrasonic beam width to 8°, thus
detecting minute objects as small as 2 x 2 cm.
Detects
objects smoothly while largely suppressing
interference from background objects.
Sealed to resist dust and dirt and emits ultrasonic
waves at a frequency of approximately 200 kHz,
thus providing high immunity from impact and
environmental noise.
Ordering Information
Output
configuration
Sensing method
Sensing distance
Model
DC switching
NPN (normally open or
closed selectable)
Through-beam
50 cm
E4B-TS50E4
closed
selectable)
100 cm
E4B-T1E4
Reflective
Convergent reflective
(Distance adjustable)
5 to 20 cm
E4B-LS20E4
20 to 70 cm
E4B-LS70E4
Convergent reflective
(Zone setting)
20 to 70 cm
Sensing zone
E4B-RS70E4
E4B E4B
2
Sensing Method
Through-beam Detects the attenuation or interrupted condition
of the ultrasonic beam caused by the object
passing between the Emitter and Receiver. E4B-TjS Emitter Sensing object E4B-TjR Receiver
Reflective Convergent
reflective distance
Detects only the beam reflected from the
object existing within the sensing distance
range set with the distance adjuster.
Unstable range
Distance adjustment
Sensing object
E4B-LSj
Convergent
reflective
zone
Sensing
object
passing zone
Detects the object with the interruption of the
normal beam reflected from the reflector. Sensing object
passing zone
Sensing distance
adjustable range
Reflector
Sensing
object
E4B-RS70
Convergent
reflective Detects only the beam reflected from the
object existing in the sensing range set with
the distance selector.
Unstable range Sensing
object
E4B-RS70
Note: An
object may be detected due to multiple reflection if the object is in the unstable range where the distance adjuster is inef
fective, in
which case however
, the detection of the object will not be stable. Therefore, do not attempt to use the E4B to detect
an
object in the
unstable
range.
Application Examples
Detection of a variety of transparent bottles in
bottle manufacturing, drink processing, and
food processing lines
Detects the absence or jamming of bottles
Detection of fluorescent lamps
Detects fluorescent lamps with the
Sensor mounted aslant.
E4B E4B
3
Specifications
Ratings/Characteristics
Model E4B-TS50E4 E4B-T1E4 E4B-LS20E4 E4B-LS70E4 E4B-RS70E4
Sensing
method
Through-beam
Convergent reflective distance
Convergent
reflective zone
Item
Sensing
distance
50 cm
1 m
5 to 20 cm
20 to 60 cm
(20 to 70 cm)
(see note 1)
20 to 60 cm
(20 to 70 cm)
(see note 1) (in
10-cm divisions)
Supply voltage
12 to 24 VDC
±
10% (10.8 to 26.4 VDC) with a max. ripple
±
10% (p-p)
Current
consumption 12 VDC
Emitter: 155 mA
max.
Receiver: 30 mA
max.
Emitter: 70 mA
max.
Receiver: 30 mA
max.
100 mA max.
24 VDC
Emitter: 80 mA
max.
Receiver: 30 mA
max.
Emitter: 50 mA
max.
Receiver: 30 mA
max.
50 mA max.
Standard sensing object
10 x 10 cm flat plate
4 x 4 cm flat plate
Differential travel
---
20% max. of sensing distance
3 cm max.
Directional angle (see note 2)
±8°
max.
Ultrasonic oscillation frequency
Approx. 200 kHz
Response frequency (see note 4)
50 Hz 10 Hz 50 Hz 20 Hz
Operating mode
Incident or interrupted (selectable)
Control output
NPN, 100 mA at 30 VDC (with a residual voltage of 1.5 V max.) and an output resistance of
4.7 k
Ω
Indicators
SENSING indicator (red LED) and ST
ABILITY indicator (green LED)
Ultrasonic speed compensation
No Yes
Ambient temperature
Operating: –10
°
C to 55
°C
Ambient humidity
Operating: 35% to 95%
T
emperature influence
±
10% max. of sensing distance at 20
°
C in the temperature range of –10
°
C and 55
°C
V
oltage influence
±
5% max. of sensing distance at a voltage between 90% and 1
10% of the rated power supply
voltage
Residual voltage
1.5 V max. under a load current of 100 mA and a cord length of 2 m
Insulation resistance
20 M
Ω
min. (at 500 VDC) between current carry parts and case
Dielectric strength
1,000 V (50/60 Hz) for 1 min between current carry parts and case
V
ibration 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/s
2
(approx. 50G) 3 times each in X, Y
, and Z directions.
Degree of protection (see note 3)
IEC IP66 (JEM IP66 water resistive)
W
eight (with 2-m-long cord and
Mounting Bracket)
Approx. 600 g (with Emitter and
Receiver)
Approx. 300 g
Note: 1.
These are the available sensing distances at an ambient temperature range between 0
°
C and 45
°C.
2.
This is the half-value angle obtainable at a signal of –6 dB.
3.
The enclosure rating indicates the degree of protection of the case, which will depend on the operating condition.
4. The
response frequencies are values
obtained with the
E4B
used for
detecting a rotating propeller-shaped disc
as
shown on the right.
Space:Blade
= 1:1
E4B E4B
4
Engineering Data
Operating Distance vs. Sensing Object Size (Typical)
E4B-TS50E4,
E4B-T1E4
Note:
The curve with the sensitivity adjuster
set to maximum indicates the size of
the
sensing object.
Note: The sensing method will change
when the sensing distance exceeds
10
cm. As a result,
the detectable di
-
ameters
will change greatly
.
E4B-LS20E4
E4B-LS70E4, E4B-RS70E4
Sensing object size (cm)
Dia. (d) of sensing object or length (W) of one side in cm.
Dia. (d) of sensing object or length (W) of one side in cm.
Sensing position
E4B-T1E4:
Sensitivity adjuster
set to Max.
E4B-TS50E4:
Sensitivity adjuster set to Max.
Sensitivity adjuster: Adjust with stable incident.
Sensitivity adjuster: Adjust with stable incident.
Sensing
position X (cm) (from Receiver)
Sample: Round pipe
that is 10 cm long min.
Sample: Round pipe
that is 10 cm long min.
Sensing distance (cm)
Operating distance (cm)
Operating Range Diagram (Typical)
E4B-LS20E4 E4B-LS70E4, E4B-RS70E4
Operating Distance vs. Sensing
Object Angle (Typical)
E4B-LS70E4, E4B-RS70E4
Standard sensing object
(40 x 40 flat plate)
Sensing distance (cm)
Sensing distance (cm)
55-dia. rod
30-dia. rod
Sensing distance (cm)
Sensing distance (cm)
Angle ( )
°
Sensing object
Distance X
Stable operating range
Operating distance X (cm)
Ambient Temperature vs. Variation
Rate of Sensing Distance (Typical)
E4B-LS70E4, E4B-RS70E4
Sensitivity Adjuster Position vs. Parallel
Movement Characteristics
E4B-T1E4
Note: Obtain the point that
turns
Y
1
and Y
2
ON while
changing the sensing
distance (X).
V
ariation rate of sensing distance (%)
Ambient temperature (
°C)
Operating distance
Y (cm)
VR:
Max.
VR: Center
VR: Min.
Setting distance X (cm)
E4B-LS70
E4B-RS70
θ
Standard sensing object (40 x 40 flat plate) Angle θ
E4B E4B
5
Adjustments
Indicators
1. STABILITY
Indicator (Green)
When
this indicator is lit, the ultrasonic input into the Receiver is suf
ficient, or its interruption is small enough, to ensure
the smooth opera
-
tion
of the E4B. Do not operate the E4B when this indicator is not lit.
2. SENSING Indicator (Red)
When this indicator is lit, the Receiver has ultrasonic input.
Indicator of Through-beam Emitter
1. Incident
Indicator
Lit when there is ultrasonic input.
To
use this indicator of the Emitter as an SENSING indicator like the indicator on the Receiver
, connect the black lead wires
of the Emitter
and
Receiver together
.
Emitter
100 mA max.
Receiver
Load
Black
Blue
Brown
Blue
Brown
Black
+12 to 24 V
0 V +12 to 24 V
0 V
Note: Be sure not to make mistakes in polarity when connecting the above wires. In other words, both brown lead wires must connect to
+DCV
or 0 V and both blue lead wires
must connect to 0 V or +DCV
. Otherwise, the indicator of the Emitter will be lit when the ultrasonic
beam
is interrupted.
2.
Power Indicator
Lit when the E4B is turned ON.
If
the above connections are
not possible (e.g., the Receiver
and Emitter use different power supplies), this indicator will
be
used as a power indicator
.
Connections of Black (White) Lead W
ire of Emitter
Power connection example
Short-circuited
Brown: +DCV
Blue: 0 V
0 V blue
Brown: 0 V
Blue: DCV
+DCV blue
Note: The indicator will not be lit if the above wires are not con-
nected correctly.
E4B E4B
6
Beam Axis, Sensitivity, and Distance Adjustments
1. E4B-T1
and E4B-TS50 Through-beam Models
Set the SENSITIVITY adjuster of the Receiver to maximum.
Move the Emitter and Receiver vertically and horizontally until the
SENSING
indicator of the Receiver is lit and secure the Emitter and
Receiver at the midpoint of the range within which the
ST
ABILITY
indicator is lit.
Optimum line
Range in which the STABILITY indicator (green) is lit
Range in which the SENSING indicator (red) is lit
Pass
the sensing object through the sensing range
and adjust the
sensitivity so that the SENSING indicator turns ON and OFF
according to the presence or absence of the sensing object while
the
ST
ABILITY indicator is lit continuously
.
If
the ST
ABILITY indicator is not lit while the Sensor is in operation,
this
may indicate a possible operational error
. Check or readjust the
sensitivity.
If the Emitter and Receiver are set at a distance shorter than the
rated
sensing distance, reduce the sensitivity to within the range in
which
the ST
ABILITY indicator is lit. This will increase the immunity
of
the Sensor against noise.
The
parallel movement characteristics (i.e.,
the mutual interference
distance) and sensing object size vary with the sensitivity adjust-
ment. Refer to Engineering Data and make the optimum adjust-
ments.
2. E4B-LS20*
and E4B-LS70 Convergent Reflective Distance Model
Locate
the Sensor so that both the ST
ABILITY and SENSING indicators will be lit when the sensing object is placed at the sensing position, and
the
ST
ABILITY indicator will be lit and the SENSING indicator will turn OFF when the sensing object is removed.
Step 1 2 3
Sensing
Sensing object
Background
Sensing object
Background
Sensing object
Background
Distance
adjuster --- ---
Adjustment
procedure
Place the sensing object at the
sensing position and turn the
distance adjuster clockwise
gradually until both the SENSING
and ST
ABILITY indicators are lit.
Move the Emitter and Receiver
vertically and horizontally and
secure the Emitter and Receiver at
the midpoint of the range within
which the ST
ABILITY indicator is lit.
Remove the sensing object and
check that the SENSING indicator is
OFF and the ST
ABILITY indicator is
continuously lit.
Note: If
the ST
ABILITY indicator is not lit while the Sensor is in operation, this
indicates a possible operational error
. Check or readjust the
sensitivity.
Note: *E4B-LS20
The
sensing distance is adjustable within a range of 10
to
20 cm with the distance adjuster
.
Sensing
distance
Position of distance adjuster
5 to 10 cm
Set to the position 5-20. The distance range will
be 5 to 23 cm in this case due to the
characteristics of the ultrasonic beam.
10 to 20 cm
The adjuster can be set freely within a range of
10 to 20 cm. The object can be detected within a
range of 5 to 10 cm in this case due to multiple
ultrasonic reflection.
Setting sensing range (cm)
Sensing object
Unstable range
Separate them 30 cm min.
Background
E4B-LS20
E4B E4B
7
3. E4B-RS70
Convergent Reflective Zone
General Use
Locate
the Sensor so that both the ST
ABILITY and SENSING indicators will be lit when the sensing object is placed at the
sensing position and
the
ST
ABILITY indicator will be lit and the SENSING indicator will be of
f when the sensing object is removed.
Step 1 2 3
Sensing
Sensing object
Background
Sensing object
Background
Sensing object
Background
Distance
selector --- ---
Adjustment
procedure
Place the sensing object at the
sensing position and turn the
distance selector clockwise
gradually until both the SENSING
and ST
ABILITY indicators are lit.
Move the Emitter and Receiver
vertically and horizontally and
secure the Emitter and Receiver at
the midpoint of the range within
which the ST
ABILITY indicator is lit.
Remove the sensing object and
check that the SENSING indicator is
OFF and the ST
ABILITY indicator is
continuously lit.
Note: 1. If
the ST
ABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error
. Check or readjust the
sensitivity.
2. If
the background object is within a distance of
1.5 m from the sensing head, the SENSING indicator may be lit and the ST
ABILITY
indicator may not be lit in spite of the absence of the sensing object. In such a case, give priority to the adjustment of the indicators
with
the sensing object located at the sensing position.
Retroreflective Use
The
retroreflective model assures the stable detection of objects un
-
der
irregular and
unstable reflection conditions (e.g., if the sensing
objects are different in surface or size, if they are passed through
diagonally,
or if they are warped or move in a wave-like way).
Reflector
Sensing range (20 to 55 cm)
ȏ: Near the midpoint of the sensing range (e.g., 45, 55, or 65 cm)
E4B-RS70
The
Reflector must be at least 4
x 4 cm in size and made of a
material that is efficiently reflective (such as a metal plate).
The
E39-R1 for photomicrosensors is ideal.
Be
sure that the reflector is not set within the sensing range.
Set
the distance selector to the desired position, fix the
reflec
-
tor
around the midpoint of the set sensing range, and check
that both the SENSING and ST
ABILITY indicators are lit.
Step 1 2 3
Sensing
Reflector
Set zone
Reflector
Reflector
Sensing object
Distance
selector --- ---
Adjustment
procedure Set
the distance selector to the
desired zone position, mount the
Reflector at or near the midpoint of
the set zone, and confirm that both
the ST
ABILITY and SENSING
indicators are lit.
Move the Emitter and Receiver
vertically and horizontally and
secure the Emitter and Receiver at
the midpoint of the range within
which the ST
ABILITY indicator is lit.
Remove the sensing object and
check that the SENSING indicator is
OFF and the ST
ABILITY indicator is
continuously lit.
E4B E4B
8
Note: 1. If
the ST
ABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error
. Check or readjust the
sensitivity.
2. If
the sensing object is in position A parallel to the Reflector as shown above, the SENSING indicator may be lit
and the ST
ABILITY
indicator
may not be lit depending on the position of the sensing object. In such a case, give priority to the adjustment of the ST
ABIL-
ITY
indicator when the beam is incident by means of the reflector
.
Operation
Output Circuits
NPN Models Switching DC
Proximity
Sensor
main
circuit
Note: 1. 100
mA max. (load current)
2.
Required when the transistor circuit is connected.
Incident
(Power supply polarity:
Brown: +; Blue: 0 V)
STABILITY
indicator (red)
Output
transistor
Load (relay)
Output voltage
(logic)
Interrupted
(Power supply polarity:
Brown: 0 V: Blue: +)
Brown
Black
Blue
Light incident
Light interrupted
ON
OFF
Operate
Release (Brown
↔ Black)
(Blue ↔ Black)
STABILITY
indicator
(red)
Output
transistor
Load (relay)
Output voltage
(logic)
Light incident
Light interrupted
ON
OFF
Operate
Release
(Brown
↔ Black)
(Blue ↔ Black)
Load
0
V
+ V
Dimensions
Note:
All units are in millimeters unless otherwise indicated.
E4B-TS50
E4B-T1
E4B-LS20
E4B-LS70
E4B-RS70
Two, M4 x 45
4.5 dia.
(See note)
Note: Vinyl-insulated round cord
with
three conductors, 6
dia.;
standard length: 2 m
E4B E4B
9
Precautions
Correct Use
Sensor Mounting Angle
If
the E4B is in level control or distance control of sensing objects,
the stability of signal detection will
depend on the sensing surface
condition of the objects. Considering the repose angle of the ob-
jects, mount the E4B so that the ultrasonic beam and the sensing
surface
of each object meet at right angles to each other
.
Surrounding Objects
Make sure that the Sensor is free from surrounding objects that
reflect
the ultrasonic beam dif
fusion,
otherwise the Sensor may mal
-
function.
In particular
, pay the utmost attention so that no side lobe
of
the ultrasonic beam will be reflected by such objects.
Mounting
Securely
mount the E4B by using
the nuts provided with the E4B or
the
mounting holes of the E4B. Refer to
Dimensions
for details.
Do
not strike
the Sensor with any hammer or other object, otherwise
the
E4B will no longer be water-resistant.
If the E4B is not mounted securely, the E4B may be damaged by
vibration
or may not detect sensing objects accurately due to a pos
-
sible
change in the mounting position.
Environmental Conditions
Do
not use the E4B at a temperature exceeding the rated range or
outdoors,
otherwise the reliability and life of the E4B will decrease.
The Ultrasonic Reflective Sensor utilizes the air as a beam trans-
mission
media. Do not use the E4B in places
with radical convection
or
extreme local temperature changes. For example, if there is a hot
air
curtain that causes turbulence within the sensing area, the E4B
may
malfunction.
Turbulence Air curtain
Emitter
Receiver
The
jetting sound of air nozzles includes noise of
a wide frequency
range,
which will af
fect the operation of the E4B. Do not use an air
nozzle
near the E4B.
The
sensing distance of the E4B will decrease if there is any water
drops
on the surface of the emitter or receiver
.
The
through-beam model may not detect any objects if there is any
object
absorbing
sound, such as powder and cotton, on the surface
of
the emitter or receiver
.
E4B E4B
10
E4B E4B
11
E4B E4B
12
OMRON Corporation
Industrial Sensors Division
Sensing Devices and Components Division H.Q.
28th Fl., Crystal T
ower Bldg.
1-2-27, Shiromi, Chuo-ku,
Osaka 540-6028 Japan
Phone: (81)6-949-6012 Fax: (81)6-949-6021
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To
convert millimeters into inches, multiply by 0.03937. T
o convert grams into ounces, multiply by 0.03527.
Cat. No. D65-E1-1 In the interest of product improvement, specifications are subject to change without notice.
Printed
in Japan
0398-1M (0398)
a
