Ultrasonic Proximity Sensor
Compact, Cylindrical Ultrasonic
Proximity Sensor with Separate
Amplifier Unit
■
Stable operation for a variety of objects regardless
E4C
of color, transparency, or material (metallic or non-
metallic).
■
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 back-
ground.
Ordering Information
Sensors
(Refer to Dimensions on page 7.)
Sensing method
Through-beam
Reflective
(convergent reflective)
Sensing distance
50 cm
10 to 35 cm
Model
E4C-TS50
E4C-LS35
Amplifier Units
(Refer to Dimensions on page 7.)
Supply voltage
12 to 24 VDC
12 to 24 VDC
Model
E4C-WH4T
E4C-WH4L
Application Examples
Detection of transparent bottles and containers
Detection of milk packages
1
E4C
E4C
Specifications
■
Ratings/Characteristics
Model
E4C-TS50
Through-beam
50 cm
10 x 10 cm flat plate
Approx. 270 kHz
50 Hz
±8°
max.
SENSING indicator (red LED)
Operating: –10°C to 55°C (with no icing)
Operating: 35 to 95%
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
2m
Approx. 300 g (with Emitter and Receiver)
Case
Oscillator
Nut
Heat-resistant ABS resin
Ceramic
Polyacetal resin
Approx. 150 g
20 Hz
E4C-LS35
Reflective
10 to 35 cm (possible to limit the sensing zone
within a range between 2 and 25 cm)
4 x 4 cm flat plate
Sensors
Item
Sensing method
Sensing distance
Standard sensing object
Ultrasonic oscillation frequency
Response frequency
Directional angle (see note 1)
Indicator
Ambient temperature
Ambient humidity
Vibration resistance
Shock resistance
Cord length
Weight
Material
Degree of protection (see note 2)
IEC IP66
Note:
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
Sensing method
50 cm
12 to 24 VDC
±10%
with a max. ripple
±10%
(p-p)
100 mA max. at 12 VDC
---
50 Hz
20% max. of rated sensing distance
20 Hz
Sensing distance
Supply voltage
(operating voltage range)
Current consumption
Differential travel
Response frequency (see note)
Control output
(residual voltage)
Operation mode
Ultrasonic compensation
Indicator
Ambient temperature
Ambient humidity
Temperature influence
Voltage influence
Insulation resistance
Dielectric strength
Vibration resistance
Shock resistance
Degree of protection
Weight
Materials
Note:
E4C-WH4T
Through-beam
10 to 35 cm
E4C-WH4L
Reflective
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)
Normally open or normally closed (selectable with a slide switch)
Yes
SENSING indicator (red LED) and STABILITY indicator (green LED)
Operating: –10°C to 55°C (with no icing)
Operating: 35 to 95%
±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
20 MΩ min. (at 500 VDC) between current carry parts and case
1,000 VAC (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 IP40
Approx. 110 g
Case: ABS
The response frequencies are values obtained with the E4C used for detecting the rotating propeller-shaped disc as shown on the
right.
2
E4C
E4C
Space:blade = 1:1
Engineering Data
Sensing Range (Typical)
E4C-LS35
Sensing range Y (cm)
Standard sensing object (4 x 4 cm flat plate)
Parallel Movement
Characteristics (Typical)
E4C-TS50
Operating distance Y (cm)
Power supply voltage: 12 VDC
Sensitivity Adjuster: Max.
Operating Distance vs.
Sensing Object Size (Typical)
E4C-LS35
Sensing object dia. d (cm)
Sensing adjuster: 10
Zone adjuster: 25
Operating range
Operating range
Operating range
Obtain the point that turns Y
1
and Y
2
ON
while changing the sensing distance (X).
Sensing object: Column
Dia.: d (cm)
Sensing distance X (cm)
Setting distance X (cm)
Setting distance X (cm)
Operating Distance vs.
Sensing Object Angle (Typical)
E4C-TS50
Sensing object dia. d (cm)
E4C-LS35
Angle (°)
Distance adjuster: 10
Zone adjuster: 25
θ°
Ambient Temperature vs.
Variation Rate of Sensing
Distance (Typical)
E4C-TS50+ E4C-WH4T
Variation rate of sensing distance (%)
Sensor and Amplifier: Same temperature
variation
Sensitivity adjuster: Max.
Operating range
Operating range
Sensitivity adjuster: Max.
Receiver
Emitter
Sensing object (dia. d mm)
Object passing position X (cm)
E4C-TS50+E4C-WH4T
Variation rate of sensing distance (%)
Sensor: Temperature varied
Amplifier: Constant room temperature
Sensitivity adjuster: Max.
Operating distance X (cm)
E4C-TS50+E4C-WH4T
Variation rate of sensing distance (%)
Variation rate of sensing distance (%)
Sensor: Constant room temperature
Amplifier: Temperature varied
Sensitivity adjuster: Max.
Ambient temperature (°C)
E4C-LS35+E4C-WH4L
Sensor and Amplifier: Same temperature
variation
Distance adjuster: 10
Zone adjuster: 25
Ambient temperature (°C)
Ambient temperature (°C)
Ambient temperature (°C)
3
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
E4C
E4C-LS35+E4C-WH4L
Sensor: Constant room temperature
Amplifier: Temperature varied
Distance adjuster: 10
Zone adjuster: 25
E4C-TS50+E4C-WH-4T
Operating distance Y (cm)
Obtain the point that turns Y
1
and Y
2
ON
while changing the sensing distance (X).
Sensitivity adjuster: Center
Sensitivity adjuster: Max.
Ambient temperature (°C)
Ambient temperature (°C)
Setting distance X (cm)
■
Amplifier Units
Asynchronous/Synchronous (MON/SYN) Switch
• If more than one Sensor is used in one place, the Sensors need
to be in synchronous operation for the prevention of mutual inter-
ference. A maximum of four Sensors can be in synchronous op-
eration.
• Connect the DC power supply and Sensor to each Amplifier as
usual.
• Use the E99-C (order separately) connector to connect the Sen-
sor to the Amplifier.
• 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.
E99-C Connector
(order separately)
(see note)
Indicators
• STABILITY Indicator (Green)
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)
When this indicator is lit, the Receiver has ultrasonic input.
Operation Selector (H1/H2)
Incident-ON (H1)
Light incident
Light interrupted
SENSING indicator (red)
Output transistor
(Both PNP and NPN outputs)
ON
OFF
ON
OFF
Load (e.g., relay)
Operate
Release
(see note)
(see note)
Incident-OFF (H2)
Light incident
Light interrupted
SENSING indicator (red)
Output transistor
(Both PNP and NPN outputs)
ON
OFF
ON
OFF
Load (e.g., relay)
Operate
Release
Amplifiers
Sensors
Note:
Note:
The load in operation is connected to the output circuit of
the E4C.
The E99-C Connector will be most effective if the E4C is
a reflective model although the E99-C Connector is re-
quired 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 Da-
ta.
4
E4C
■
E4C
Sensitivity/Zone Adjustments
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.
If the STABILITY indicator is not lit while the Sensor is in opera-
tion, this may indicate a possible operational error. Check or read-
just 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.
E4C-TS50 and E4C-WH4T 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 STA-
BILITY indicator is lit.
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 posi-
tion, and the STABILITY indicator will be lit and the SENSING indicator will turn OFF when the sensing object is removed.
Step
Sensing
1
Sensing object
Background
2
Sensing object
Background
3
Background
Sensing object
4
35 cm
Sensing object
Background
Distance adjuster
Zone adjuster
---
---
Adjustment
procedure
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)
Move the Emitter and Re-
ceiver vertically and hori-
zontally and secure the
Emitter and Receiver at the
midpoint of the range within
which the STABILITY indi-
cator 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.
Note:
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
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