Ultrasonic Proximity Sensor
E4C
Compact, Cylindrical Ultrasonic
Proximity Sensor with Separate
Amplifier Unit
■ Stable operation for a variety of objects regardless
of color, transparency, or material (metallic or nonmetallic).
■ Compact M18-sized cylindrical head.
■ Prevent mutual interference using a synchroniza-
tion selector.
■ With reflective models, setting sensing zones
ensures detection without influence by the background.
Ordering Information
Sensors (Refer to Dimensions on page 7.)
Sensing method
Through-beam
Reflective
(convergent reflective)
Amplifier Units (Refer to Dimensions on page 7.)
Sensing distance
Model
Supply voltage
Model
50 cm
E4C-TS50
12 to 24 VDC
E4C-WH4T
10 to 35 cm
E4C-LS35
12 to 24 VDC
E4C-WH4L
Application Examples
Detection of transparent bottles and containers
Detection of milk packages
1
E4C
E4C
Specifications
■
Ratings/Characteristics
Sensors
Model
Item
Sensing method
E4C-TS50
E4C-LS35
Through-beam
Reflective
Sensing distance
50 cm
10 to 35 cm (possible to limit the sensing zone
within a range between 2 and 25 cm)
Standard sensing object
10 x 10 cm flat plate
4 x 4 cm flat plate
Ultrasonic oscillation frequency
Approx. 270 kHz
Response frequency
50 Hz
Directional angle (see note 1)
±8° max.
Indicator
SENSING indicator (red LED)
20 Hz
Ambient temperature
Operating: –10°C to 55°C (with no icing)
Ambient humidity
Operating: 35 to 95%
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 (approx. 50G) 3 times each in X, Y, and Z directions
Degree of protection (see note 2) IEC IP66
Cord length
2m
Weight
Material
Note:
Approx. 300 g (with Emitter and Receiver)
Case
Heat-resistant ABS resin
Oscillator
Ceramic
Nut
Polyacetal resin
Approx. 150 g
1. This is the half-value angle obtainable with a signal of -6 dB.
2. The enclosure rating indicates the degree of protection of the case, which will depend on the operating condition.
Amplifier Units
Model
Item
E4C-WH4T
Sensing method
E4C-WH4L
Through-beam
Reflective
Sensing distance
50 cm
10 to 35 cm
Supply voltage
(operating voltage range)
12 to 24 VDC ±10% with a max. ripple ±10% (p-p)
Current consumption
100 mA max. at 12 VDC
Differential travel
---
20% max. of rated sensing distance
Response frequency (see note)
50 Hz
20 Hz
Control output
(residual voltage)
Terminal output: 100 mA max. (NPN or PNP open collector output at 40 VDC with a residual voltage
of 2 V)
Connector output: 50 mA max. (photocoupler output)
Operation mode
Normally open or normally closed (selectable with a slide switch)
Ultrasonic compensation
Yes
Indicator
SENSING indicator (red LED) and STABILITY indicator (green LED)
Ambient temperature
Operating: –10°C to 55°C (with no icing)
Ambient humidity
Operating: 35 to 95%
Temperature influence
±30% max. of sensing distance at 20°C in the
±10% max. of sensing distance at 20°C in the
temperature range of –10°C and 55°C
temperature range of –10°C and 55°C
±10% max. of sensing distance at a voltage between 90% and 110% of the rated power supply voltage
Voltage influence
Insulation resistance
20 MΩ min. (at 500 VDC) between current carry parts and case
Dielectric strength
1,000 VAC (50/60 Hz) for 1 min between current carry parts and case
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 (approx. 50G) 3 times each in X, Y, and Z directions
Degree of protection
IEC IP40
Weight
Approx. 110 g
Materials
Case: ABS
Note:
2
The response frequencies are values obtained with the E4C used for detecting the rotating propeller-shaped disc as shown on the
right.
E4C
E4C
Space:blade = 1:1
Engineering Data
E4C-LS35
E4C-TS50
E4C-LS35
Standard sensing object (4 x 4 cm flat plate)
Operating range
Operating range
Power supply voltage: 12 VDC
Sensitivity Adjuster: Max.
Sensing object dia. d (cm)
Operating Distance vs.
Sensing Object Size (Typical)
Operating distance Y (cm)
Parallel Movement
Characteristics (Typical)
Sensing range Y (cm)
Sensing Range (Typical)
E4C-TS50+ E4C-WH4T
Sensitivity adjuster: Max.
Emitter
Sensing object (dia. d mm)
Operating distance X (cm)
Object passing position X (cm)
Sensor: Temperature varied
Amplifier: Constant room temperature
Sensitivity adjuster: Max.
Ambient temperature (°C)
Sensor: Constant room temperature
Amplifier: Temperature varied
Sensitivity adjuster: Max.
Ambient temperature (°C)
Sensor and Amplifier: Same temperature
variation
Sensitivity adjuster: Max.
Ambient temperature (°C)
E4C-TS50+E4C-WH4T
Variation rate of sensing distance (%)
E4C-TS50+E4C-WH4T
Variation rate of sensing distance (%)
Distance adjuster: 10
Zone adjuster: 25
θ°
Variation rate of sensing distance (%)
E4C-LS35
Operating range
Receiver
Setting distance X (cm)
Ambient Temperature vs.
Variation Rate of Sensing
Distance (Typical)
E4C-LS35+E4C-WH4L
Variation rate of sensing distance (%)
Operating range
Setting distance X (cm)
Operating Distance vs.
Sensing Object Angle (Typical)
Angle (°)
Sensing object dia. d (cm)
E4C-TS50
Operating range
Sensing object: Column
Dia.: d (cm)
Obtain the point that turns Y1 and Y2 ON
while changing the sensing distance (X).
Sensing distance X (cm)
Sensing adjuster: 10
Zone adjuster: 25
Sensor and Amplifier: Same temperature
variation
Distance adjuster: 10
Zone adjuster: 25
Ambient temperature (°C)
3
E4C
E4C
Sensitivity Adjuster Position
vs. Parallel Movement
Characteristics
E4C-LS35+E4C-WH4L
Variation rate of sensing distance (%)
Variation rate of sensing distance (%)
Sensor: Temperature varied
Amplifier: Constant room temperature
Distance adjuster: 10
Zone adjuster: 25
Sensor: Constant room temperature
Amplifier: Temperature varied
Distance adjuster: 10
Zone adjuster: 25
Ambient temperature (°C)
■
E4C-TS50+E4C-WH-4T
Operating distance Y (cm)
E4C-LS35+E4C-WH4L
Obtain the point that turns Y1 and Y2 ON
while changing the sensing distance (X).
Sensitivity adjuster: Center
Sensitivity adjuster: Max.
Ambient temperature (°C)
Setting distance X (cm)
Amplifier Units
Indicators
Asynchronous/Synchronous (MON/SYN) Switch
• STABILITY Indicator (Green)
• If more than one Sensor is used in one place, the Sensors need
to be in synchronous operation for the prevention of mutual interference. A maximum of four Sensors can be in synchronous operation.
When this indicator is lit, the ultrasonic input into the Receiver is
sufficient, or its interruption small enough, to ensure the smooth
operation of the E4C. Do not operate the E4C when this indicator
is not lit.
• SENSING Indicator (Red)
• Connect the DC power supply and Sensor to each Amplifier as
usual.
When this indicator is lit, the Receiver has ultrasonic input.
• Use the E99-C (order separately) connector to connect the Sensor to the Amplifier.
Operation Selector (H1/H2)
• If the case of the connections shown in the following illustration,
set the selector of only one Amplifier (No. 1 in the following case)
to MON. Set the selector of any other Amplifier to SYN.
Incident-ON (H1)
Light incident
Light interrupted
SENSING indicator (red)
Output transistor
(Both PNP and NPN outputs)
(see note)
ON
(see note)
E99-C Connector
(order separately)
(see note)
OFF
ON
OFF
Load (e.g., relay)
Operate
Release
Incident-OFF (H2)
Light incident
Light interrupted
SENSING indicator (red)
Output transistor
(Both PNP and NPN outputs)
ON
ON
OFF
Load (e.g., relay)
Operate
Release
Note:
4
Amplifiers
Sensors
OFF
The load in operation is connected to the output circuit of
the E4C.
Note:
The E99-C Connector will be most effective if the E4C is
a reflective model although the E99-C Connector is required by both the reflective and through-beam models.
When using through-beam models, however, be sure to
maintain enough between adjacent Sensors to suppress
mutual interference. Refer to Sensitivity Adjuster Position
vs. Parallel Movement Characteristics in Engineering Data.
E4C
■
E4C
Sensitivity/Zone Adjustments
E4C-TS50 and E4C-WH4T Through-beam Models
Pass the sensing object through the sensing range and adjust the
sensitivity so that the SENSING indicator turns ON and OFF
according the presence or absence of the sensing object while
the STABILITY indicator is lit continuously.
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 STABILITY indicator is lit.
If the STABILITY 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 STABILITY indicator is lit. This will increase the
immunity of the Sensor against noise.
Range in which the STABILITY indicator (green) lit
Optimum line
Range in which the SENSING indicator (red) lit
E4C-LS35 and E4C-WH4L Convergent Reflective Model
Locate the Sensor so that both the STABILITY and SENSING indicators will be lit when the sensing object is placed at the sensing position, and the STABILITY indicator will be lit and the SENSING indicator will turn OFF when the sensing object is removed.
2
4
Background
Sensing object
Background
Sensing object
35 cm
Background
Background
Distance adjuster
3
Sensing object
1
Sensing object
Step
Sensing
---
---
Move the Emitter and Receiver vertically and horizontally and secure the
Emitter and Receiver at the
midpoint of the range within
which the STABILITY indicator is lit.
Remove the sensing object The sensing zone can be
and check that the SENS- set within a range of 2 to 25
ING indicator is OFF and
cm with the zone adjuster.
the STABILITY indicator is
continuously lit.
Zone adjuster
Adjustment
procedure
Note:
Place the sensing object at
the sensing position and
turn the distance adjuster
clockwise gradually until
both the SENSING and
STABILITY indicators are
lit. (See note 2)
1. If the STABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error. Check or readjust
the sensitivity.
2. The sensing distance is adjustable within a range of 10 to 35 cm with the distance adjuster.
3. Adjust the sensing zone within the sensing distance adjustable range (i.e., 10 to 35 cm).
5
E4C
E4C
Sensing Zone Setting Example
Relationship between Incident-ON and IncidentOFF
Sensing zone
Example:
Sensing distance set to 15 cm and zone set to 10 cm
Sensing distance Sensing zone
adjustment
adjustment
Incident-ON
Note:
Make the settings as shown above to set a sensing zone
of 10 cm with a sensing distance adjustment of 15 cm.
Background object
Sensing distance Sensing zone
adjustment
adjustment
Incident-OFF
Unstable
sensing zone
Stable sensing zone
(adjustable)
(Outside the ratings)
Note:
Non-sensing
zone
(Outside the ratings)
Set the zone within a distance of 10 to 35 cm from the
Sensor. Therefore, if the distance adjuster is set to 30 cm
and zone adjuster is set to 20 cm, the sensing zone will be
5 cm from a point 30 cm away from the Sensor.
Step
1
2
Distance
adjuster and
zone adjuster
Adjustment
procedure
Set the distance adjuster to 15 cm
Set the zone adjuster
to 10 cm.
Nomenclature
E4C-WH4T
E4C-WH4L
Asynchronous/Synchronous (MON/SYN)
operation selector
Asynchronous/Synchronous (MON/SYN)
operation selector
Operation (H1/H2) selector
Operation (H1/H2) selector
SENSING indicator
Sensitivity adjuster
STABILITY indicator
Operation
■
Output Circuit
12 to 24 V
Load
E4C
main
circuit
PNP output
100 mA max.
Load
NPN output
100 mA max.
0V
6
Zone adjuster
SENSING indicator
STABILITY indicator
Distance (sensing
distance) adjuster
E4C
E4C
Dimensions
Note:
All units are in millimeters unless otherwise indicated.
Sensors
E4C-TS50
E4C-LS35
SENSITIVITY indicator
Mounting Holes
18.5 dia.
11 dia.
8 dia. 9 dia.
(See note)
Note: E4C-TS50R or E4C-LS35: 3-conductor, shielded cord (6 dia., UL2791) with 7/0.25 dia. (standard length: 2 m)
E4C-TS50S: 2-conductor, shielded cord (6 dia., UL20276) with 7/0.25 dia. (standard length: 2 m)
Amplifier Units
E4C-WH4T
Eight, M3.5 terminal screws
Two, M4 screw mounting holes
Mounting Holes
Two, 4.5 dia.
(See note)
Note: DIN track mounting side
E4C-WH4L
Eight, M3.5 terminal screws
Two, M4 screw mounting holes
Mounting Holes
Two, 4.5 dia.
(See note)
Note: DIN track mounting side
7
E4C
E4C
Installation
■
Connections
E4C-WH4T
E4C-WH4L
12 to 24 VDC
Output 1 (NPN)
100 mA max.,
40 VDC max.
Output 2 (PNP)
100 mA max.,
40 VDC max.
Black
White
12 to 24 VDC
Output 2 (PNP)
100 mA max.,
40 VDC max.
Output 1 (NPN)
100 mA max.,
40 VDC max.
Red
Black
Red
Shield
White
Shield
E4C-LS35
E4C-TS50
Precautions
■
Correct Use
Sensor Mounting Angle
Environmental Conditions
If the E4C 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
objects, mount the E4C so that the ultrasonic beam and the sensing surface of each object meet at right angles to each other.
Do not use the E4C at a temperature exceeding the rated range
or outdoors, otherwise the reliability and life of the E4C will
decrease.
Surrounding Objects
Make sure that the Sensor is free from surrounding objects that
reflect the ultrasonic beam diffusion, otherwise the Sensor may
malfunction. In particular, pay the utmost attention so that no side
lobe of the ultrasonic beam will be reflected by such objects.
Mounting
The Ultrasonic Reflective Sensor utilizes the air as a beam transmission media. Do not use the E4C 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 E4C may malfunction.
Turbulence
Air curtain
Securely mount the E4C by using the nuts provided with the E4C
or the mounting holes of the E4C. Refer to Dimensions for details.
Emitter
Do not strike the Sensor with any hammer or other object, otherwise the E4C will no longer be water-resistant.
If the E4C is not mounted securely, the E4C may be damaged by
vibration or may not detect sensing objects accurately due to a
possible change in the mounting position.
Receiver
The jetting sound of air nozzles includes noise of a wide frequency range, which will affect the operation of the E4C. Do not
use an air nozzle near the E4C.
The sensing distance of the E4C will decrease if there is any
water drops on the surface of the emitter or receiver.
The reflective 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.
8
E4C
E4C
Mutual Interference
If more than one Unit is closely mounted together or used in a
narrow space, the mutual interference of the Sensors will result.
To prevent this, set the MON/SYN selector to SYN and check that
no mutual interference results.
Connections
The cord length between the Sensor and Amplifier can be a maximum of 20 m provided that the cord is a three-conductor,
shielded cord (6 dia., UL2791) with 7/0.25 dia. If the Emitter is the
E4C-TS50S, however, use a two-conductor, non-shielded cord
(6 dia. UL20276) with 7/0.25 dia.
Do not wire the lines of the E4C along with high-tension or power
lines in the same conduit or close together, otherwise the E4C
may malfunction due to inductive noise.
The power supply lines of the Amplifier can be extended up to
100 m provided that the size of the cord is 0.3 dia. or more.
Others
Be sure not to turn the sensitivity adjuster excessively. If the sensitivity adjuster is turned exceeding the permissible range, no
sensitivity adjustment will be possible again.
Take the measures shown in the following illustrations if multiple
reflection results.
5-dia. slit
Wall
Wall
Urethane rubber or sponge
The sensing distance will be, however, reduced to half (i.e., 10 to
17 cm) if the slit is used.
If the sensing zone is set to a small value (i.e., a few centimeters)
on the E4C reflective model, the E4C may require a warming-up
time of 3 minutes or more after the E4C is turned ON.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
In the interest of product improvement, specifications are subject to change without notice.
9
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and other materials 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
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of Liability.
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 part numbers when published ratings or features are changed,
or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for
your application. Please consult with your Omron’s representative at any time
to confirm actual specifications of purchased Product.
Errors and Omissions. Information presented by Omron Companies has been
checked and is believed to be accurate; however, no responsibility is assumed
for clerical, typographical or proofreading errors or omissions.
OMRON ELECTRONICS LLC • THE AMERICAS HEADQUARTERS • Schaumburg, IL USA • 847.843.7900 • 800.556.6766 • www.omron247.com
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OTHER OMRON LATIN AMERICA SALES
54.11.4783.5300
Omron Europe B.V. Wegalaan 67-69, NL-2132 JD, Hoofddorp, The Netherlands. Tel: +31 (0) 23 568 13 00 Fax: +31 (0) 23 568 13 88 www.industrial.omron.eu
Cat. D072-E1-03
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Note: Specifications are subject to change.
© 2010 Omron Electronics LLC
