Ultrasonic Proximity Sensor
Rectangular Ultrasonic Proximity
Sensor with Built-in Amplifier
■
Stable operation for a variety of objects regardless
E4B
of color, transparency, or material (metallic or non-
metallic).
■
Ultrasonic beam expansion of approx. 8°.
Detect small objects of 20 x 20 mm min.
■
With reflective models, setting sensing zones
ensures detection without influence by the back-
ground.
Ordering Information
Sensor
(Refer to Dimensions on page 8.)
Output configuration
DC switching
NPN (normally open or
closed selectable)
Sensing method
Through-beam
Sensing distance
Model
E4B-TS50E4
50 cm
E4B-T1E4
100 cm
Reflective
Convergent reflective
(Distance adjustable)
E4B-LS20E4
5 to 20 cm
E4B-LS70E4
20 to 70 cm
Convergent reflective
(Zone setting)
20 to 70 cm
Sensing zone
E4B-RS70E4
1
E4B
■
E4B
Sensing Method
Detects the attenuation or interrupted condition
of the ultrasonic beam caused by the object
E4B-T@S Emitter
passing between the Emitter and Receiver.
Sensing object
E4B-T@R Receiver
Through-beam
Reflective
Convergent reflective distance
Detects only the beam reflected from the
object existing within the sensing distance
range set with the distance adjuster.
E4B-LS@
Distance adjustment
Unstable range
Sensing object
Sensing distance
adjustable range
Convergent
reflective
zone
Sensing object
passing zone
Detects the object with the interruption of the
normal beam reflected from the reflector.
E4B-RS70
Sensing object
passing zone
Sensing
object
Reflector
Convergent
reflective
Detects only the beam reflected from the
object existing in the sensing range set with
the distance selector.
E4B-RS70
Unstable range
Sensing
object
Note:
An object may be detected due to multiple reflection if the object is in the unstable range where the distance adjuster is ineffective,
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
Detection of fluorescent lamps
Detects the absence or jamming of bottles
Detects fluorescent lamps with the
Sensor mounted aslant.
2
E4B
E4B
Specifications
■
Ratings/Characteristics
Model
E4B-TS50E4
E4B-T1E4
E4B-LS20E4
E4B-LS70E4
E4B-RS70E4
Convergent re-
flective zone
20 to 60 cm
(20 to 70 cm)
(see note 1) (in
10-cm divisions)
Sensing method
Through-beam
Sensing
50 cm
distance
1m
Convergent reflective distance
5 to 20 cm
20 to 60 cm
(20 to 70 cm)
(see note 1)
Item
Supply voltage
Current con-
sumption
12 VDC
12 to 24 VDC
±
10% (10.8 to 26.4 VDC) with a max. ripple
±10%
(p-p)
Emitter: 155 mA
max.
Receiver: 30 mA
max.
Emitter: 80 mA
max.
Receiver: 30 mA
max.
---
±8°
max.
Approx. 200 kHz
50 Hz
10 Hz
50 Hz
20 Hz
Incident or interrupted (selectable)
Emitter: 70 mA
max.
Receiver: 30 mA
max.
Emitter: 50 mA
max.
Receiver: 30 mA
max.
100 mA max.
24 VDC
50 mA max.
4 x 4 cm flat plate
20% max. of sensing distance
3 cm max.
Standard sensing object
Differential travel
Directional angle (see note 2)
Ultrasonic oscillation frequency
Response frequency (see note 4)
Operating mode
Control output
Indicators
Ultrasonic speed compensation
Ambient temperature
Ambient humidity
Temperature influence
Voltage influence
Residual voltage
Insulation resistance
Dielectric strength
Vibration resistance
Shock resistance
Degree of protection (see note 3)
Weight (with 2-m-long cord and
Mounting Bracket)
Materials
Note:
10 x 10 cm flat plate
NPN, 100 mA at 30 VDC (with a residual voltage of 1.5 V max.) and an output resistance of 4.7 kΩ
SENSING indicator (red LED) and STABILITY indicator (green LED)
No
Operating: –10°C to 55°C
Operating: 35% to 95%
±10%
max. of sensing distance at 20°C in the temperature range of –10°C and 55°C
±5%
max. of sensing distance at a voltage between 90% and 110% of the rated power supply volt-
age
1.5 V max. under a load current of 100 mA and a cord length of 2 m
20 MΩ min. (at 500 VDC) between current carry parts and case
1,000 V (50/60 Hz) for 1 min between current carry parts and case
Destruction: 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Destruction: 500 m/s
2
(approx. 50G) 3 times each in X, Y, and Z directions.
IEC IP66 (JEM IP66 water resistive)
Approx. 600 g (with Emitter and Re-
ceiver)
Case: ABS, Oscillator: Ceramic
Approx. 300 g
Yes
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
3
E4B
E4B
Engineering Data
Operating Distance vs. Sensing Object Size (Typical)
Dia. (d) of sensing object or length (W) of one side in cm.
E4B-TS50E4, E4B-T1E4
Sensing position
E4B-LS20E4
Dia. (d) of sensing object or length (W) of one side in cm.
E4B-LS70E4, E4B-RS70E4
Sample: Round pipe
that is 10 cm long min.
Sensing object size (cm)
E4B-T1E4:
Sensitivity adjuster
set to Max.
Sample: Round pipe
that is 10 cm long min.
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)
Note:
The curve with the sensitivity adjuster
set to maximum indicates the size of
the sensing object.
Sensing distance (cm)
Note:
The sensing method will change
when the sensing distance exceeds
10 cm. As a result, the detectable
diameters will change greatly.
Operating distance (cm)
Operating Range Diagram (Typical)
Sensing distance (cm)
E4B-LS20E4
Sensing distance (cm)
Standard sensing object
(40 x 40 flat plate)
Operating Distance vs. Sensing
Object Angle (Typical)
E4B-LS70E4, E4B-RS70E4
Standard sensing object (40 x 40 flat plate)
55-dia. rod
30-dia. rod
E4B-LS70E4, E4B-RS70E4
Angle
θ
(°)
Angle
θ
E4B-LS70
E4B-RS70
Sensing object
Distance X
Stable operating range
Sensing distance (cm)
Sensing distance (cm)
Operating distance X (cm)
Ambient Temperature vs. Variation
Rate of Sensing Distance (Typical)
E4B-LS70E4, E4B-RS70E4
Variation rate of sensing distance (%)
Operating distance Y (cm)
Sensitivity Adjuster Position vs.
Parallel Movement Characteristics
E4B-T1E4
V
R
: Max.
V
R
: Center
V
R
: Min.
Ambient temperature (°C)
Note:
Obtain the point that
turns Y
1
and Y
2
ON
Setting distance X (cm)
while changing the
sensing distance (X).
4
E4B
■
E4B
Adjustments
1. STABILITY Indicator (Green)
When this indicator is lit, the ultrasonic input into the Receiver is sufficient, or its interruption is small enough, to ensure the smooth
operation 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.
Indicators
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.
Load
100 mA max.
Black
Blue
+12 to 24 V
0V
Brown
Emitter
Black
Receiver
Blue
Brown
+12 to 24 V
0V
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.
Connections of Black (White) Lead Wire of Emitter
Power connection example
Brown: +DCV
Blue: 0 V
Brown: 0 V
Blue: DCV
Note:
Short-circuited
0 V blue
+DCV blue
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.
The indicator will not be lit if the above wires are not con-
nected correctly.
5
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