E4DA E4DA
101
Ultrasonic Displacement Sensor E4DA
■Narrow 5 mm ultrasonic beam detects objects as
small as 1 mm diameter at 50 mm distance with
0.2 mm resolution
■Amplifier provides three inspection
outputs–high, pass and low
■Amplifier provides 4 to 20 mA analog output
■Alarm output helps identify irregular beam
reflection
■Input hold function retains previous input
level, up to 40 ms, to stabilize operation
■External gate input and 40 ms
OFF-delay available on amplifier
■Fast, 2 ms response time
■30 to 70 mm sensing distance
Sensor’s Narrow Ultrasonic Beam Accurately
Detects Small Objects, Provides Linear Analog
Output for Inspection and Measurement
Sensing Supply voltage Output
Ultrasonic beam 12 to 24 VDC
30 to 70 mm 80 mA, 30 VDC 4 to 20 mA
Ordering Information
Sensing distance Part number
30 to 70 mm (1.18 to 2.76 in) E4DA-LS7
■ SENSOR
Description Part number
High, pass and low discrimination outputs E4DA-WL1C
■ AMPLIFIER
Description Part number
Replacement sensor mounting bracket E39-L52
5-meter extension cable between sensor and amplifier E49-DD5
■ ACCESSORIES
■ LINEAR OUTPUT VS. SENSING DISTANCE
The linear output of the sensor is locked between
21.8 to 28 mA when the target is outside the
measurement range. There is no linear output
when the target measurement distance is less than
26 mm.
26 30 40 50 60 70 80
20
4
Linear output (mA)
Sensing distance (mm)
Measurement range
E4DA E4DA
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Supply voltage 12 to 24 VDC
Operating voltage 10.8 to 26.4 VDC; ripple 10% max. peak-to-peak
Current consumption 200 mA
Response time 2 ms
Type No-voltage contact or NPN solid-state input
Signal voltage ON: 0 to 1 V, 1 mA minimum
level OFF: 4 to 24 V, 15 mA max. or open between terminals
Analog Range 4 to 20 mA, 300 Ω max. load impedance
Linearity ±1% full scale max.
ON/OFF Number Three (HIGH, PASS, LOW)
Ty pe Optoisolated transistor outputs
Rating 80 mA, 30 VDC max.
Residual voltage 1 V max.
Alarm Number One
Type Optoisolated transistor output
Rating 80 mA, 30 VDC max.
Residual voltage 1 V max.
Materials Plastic case
Mounting Two through holes for surface mounting using M4 screws
Connection Screw terminals
Weight 230 g (8.1 oz.)
UL —
NEMA —
IEC 144 IP30
Approvals UL —
CSA —
Ambient operating temperature -10° to 55°C (14° to 131°F)
Specifications
Method of detection Ultrasonic displacement
Sensing distance 30 to 70 mm (1.18 to 2.76 in) with 40 x 40 mm (1.57 x 1.57 in) flat object
Minimum detectable object 1 mm (0.04 in) diameter at 50 mm (1.97 in) sensing distance without a background object
Resolution 0.2 mm (0.008 in) at 50 mm (1.97 in)
Differential travel 1 to 3% of 70 mm (2.76 in) rated sensing distance
Directional angle ±3° max.
Variation due to temperature changes ±4% full scale max. for output value at 25°C in ambient range of -10° to 55°C (14° to 131°F)
Variation due to voltage changes ±2% full scale max. over operating voltage range of 10.8 to 26.4 VDC
Indicators SENSING (red LED)
Materials Plastic case
Mounting Side surface mount with two through holes. E39-L52 bracket and mounting hardware
supplied.
Connections Cable, 2 m (6.6 ft) length, supplied
Weight 130 g (4.6 oz.)
UL —
NEMA 2
IEC 144 IP66
Approvals UL —
CSA —
Ambient operating temperature -10° to 55°C (14° to 131°F)
■ SENSOR E4DA-LS7
■ AMPLIFIER E4DA-WL1C
Enclosure
ratings
External
gate input
Enclosure
ratings
Control
outputs
E4DA E4DA
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Input hold selector switch
determines type of input signal
filtering: none (0 ms), 40 ms input
hold, and extended input hold to
stabilize input and eliminate
chattering
E4DA-WL1C Amplifier
E4DA-LS7 Sensor
■ SENSOR AND AMPLIFIER
I/O terminal
Distance set point
indicators
HIGH output
distance setting
(4 rotations)
LOW output
distance setting
(4 rotations)
Output mode selector
switch enables 40 ms
OFF-delay timer
Connector for sensor
Sensing indicator
lights when
receiving reflected
sonic beam
Output indicators
Alarm output indicator
Shorting wire to disable external gate input
To use external gate input, connect a
contact or NPN input device with 15 mA,
24 VDC max. switching capacity.
Sensing indicator lights when
receiving reflected sonic beam
Nomenclature
E4DA E4DA
104
■ FUNCTIONS — AMPLIFIER
Classification Function
Linear output An analog 4 to 20 mA signal will be output from amplifier terminals 2 and 8 according to the distance
measured to a target within the 30 to 70 mm measurement range. The output will be locked between 21.8 and
28 mA when the target is beyond the maximum measurement distance. Note: A 10-minute warm-up period is
required from power-up to allow the linear output to stabilize.
High setpoint The high setpoint output operates according to the high setpoint distance. Rated 80 mA at 30 VDC maximum,
the output with indicator is energized when the target measurement distance is 0.2 mm greater than the high
setpoint distance.
Pass setpoint The pass setpoint output operates according to the high setpoint distance and the low setpoint distance. Rated
80 mA at 30 VDC, the output with indicator is energized when the target measurement distance is less than
the high setpoint distance but greater than the low setpoint distance.
Low setpoint The low setpoint output operates according to the low setpoint distance. Rated 80 mA at 30 VDC maximum,
the output is energized when the target measurement distance is 0.2 mm less than the low setpoint distance.
Alarm The alarm output operates according to the 30 mm minimum measurement distance. Rated 80 mA at 30 VDC
maximum, the alarm output is energized when the target measurement distance is less than the 30 mm
Sensitivity The sensitivity indicator illuminates when the sensor's receiver is detecting a reflected sonic beam off the
(amplifier target.
and sensor)
Alarm The alarm indicator illuminates when the target measurement distance is less than the 30 mm minimum
measurement distance but greater than the 26 mm uncertain operation measurement distance.
High range The high range indicator illuminates at the same time the high setpoint output is on.
Pass range The pass range indicator illuminates at the same time the pass setpoint output is on.
Low range The low range indicator illuminates at the same time the low setpoint output is on.
Gate input The gate input, rated 15 mA at 24 VDC maximum, synchronizes the start of the sonic measurement with the
correct position of the target.
High range Used to adjust the high setpoint measurement distance and control output. The 4-turn potentiometer allows for
setpoint dial fine tuning of the distance setting. The reference scale above the dial is labeled 30 to 70 mm and marked in
5 mm increments.
Low range Used to adjust the low setpoint measurement distance and control output. The 4-tur n potentiometer allows for
setpoint dial fine tuning of the distance setting. The reference scale above the dial is labeled 30 to 70 mm and marked in
5 mm increments.
Mode switch In the timer position, a 40 ms OFF-delay is added to the 2 ms response time for the pass setpoint output only.
The high and low setpoint outputs are disabled during the 40 ms OFF-delay.
Input hold switch The input hold function stabilizes target measurement by adding a time delay until the next stabilized sonic
input is received. This minimizes output signal chatter due to unstable input signals from rough surfaces of
changes in target position.
Operation
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■ THREE-STAGE CONTROL OUTPUT
In the example below, the LOW setting is at 40 mm, and the
HIGH setting is at 60 mm. The table below summarizes the
three output ranges:
The two variable distance adjusters on the amplifier front
panel are used to establish three control output stages from
the 4 to 20 mA input signal. Each four-turn adjuster allows fine
tuning of the setting. The reference scale above the adjuster
is in 5 mm increments. The linear output current is propor-
tional to the distance to the detected object and is independ-
ent of the distance settings.
26
LOW range 30 to 39.8 mm
PASS range 40 to 60 mm
HIGH range 60.2 to 70 mm
The 0.2 mm resolution accounts for
the decimal figures. The distance
from the sensor face to 25 mm is a
multiple reflecting range where
output is unstable and should not be
used. From 26 mm to 30 mm the
object is out of detectable range, so
an ALARM output occurs.
■ OUTPUT OFF-DELAY FUNCTION
The E4DA amplifier’s response time of 2 ms may provide an
output signal too fast for a programmable controller to read.
The timer function provides a 40 ms OFF-delay that holds
only the PASS output for the full duration. The High and Low
outputs are disabled and do not operate during the OFF-
delay. Whether the gate input is used, or not used, the OFF-
delay timer will operate. The output OFF-delay timer is
independent of the input HOLD timing. No timer function. Disables OFF-delay timer.
40 ms OFF-delay enabled. Holds only the
PASS output for the full duration.
Target
E4DA E4DA
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■ INPUT HOLD FUNCTION
When the detected object tilts or when it has a rough surface
that absorbs the ultrasonic beam, the E4DA sensor may judge
that there is no detected object or the signal has not been
returned, causing the output to be unstable (chatter). The
input hold function, stabilizes detection by adding a time delay
until the next stable input is received.
The three-position slide switch located on the front panel of
the amplifier, has settings for 0 ms, 40 ms (for time delay) and
EXT for extended delay.
The 40 ms setting enables an
internal timer to hold a stable
input value for up to 40 ms
until a new stable value is
input. The hold function is
automatically cancelled when
a new stable value is input.
The 0 ms setting disables the
input hold function.
The EXT setting provides an
extended hold period until a
new stable input value is
received.
E4DA E4DA
107
■ AMPLIFIER E4DA-WL1C
Mounting holes
67.4 (2.65)
40
(1.57)
11.2 (0.44)
82.3 (3.24)
80 (3.15)
84 ± 2
(3.31 ± 0.08)
57 ± 0.3
(2.24 ± 0.01)
15 (0.59) dia.
10.5 (0.41)
16 (0.63)
17.5 (0.69)
12.7 (0.50)
21.8
(0.86)
6.2 (.24)
9.6 (0.38)
13 (0.51)
20 (0.79)
46.9
(1.85)
Dimensions
Unit: mm (inch)
■ SENSOR E4DA-LS7 Mounting holes
■ OPTIONAL EXTENSION CABLE E49-DD5
* 2 m (6.56 ft) oil-resistant, vinyl-insulated, shield wire, 6 mm OD
32
(1.26)
3.2
(0.13)
17 (0.67)
3.2 (0.13)
3 (0.12)
18
(0.71) 2 (0.08)
16.9 (0.67)
13.2 (0.52)
1.2 (0.05)
28.5
(1.12)
48 (1.89)
16
(0.63)
9 (0.35)
40
(1.57) 3.3 (0.13)
3.5 (0.14)
33 (1.30)
40
(1.57)
26
(1.02)
11.2 (0.44)
16.3 (0.64)
20
(0.79)
13
(.51)
3.8 (0.15)
5 m
(16.4 ft)
33.8
(1.33)
*
* 5 m (16.4 ft) oil-resistant, vinyl-insulated, round
Outside 6 dia. 5 m
5 (0.20) dia.
15 (0.59) dia.
36
(1.42)
74.8
(2.94)
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Engineering Data
■ OPERATING RANGE
The operating range depends on the target object's direction of approach.
The size of the minimum detected object depends on whether or not a background object is present.
To detect a very small object, keep the background at least 40 mm away from the object.
Without Background Object
With Background Object
X = 30 mm
X = 70 mm
X = 50 mm
■ MINIMUM DETECTABLE OBJECT
■ LINEAR OUTPUT VS. SENSING DISTANCE
The linear output of the sensor is locked between
21.8 to 28 mA when the target is outside the
measurement range. There is no linear output
when the target measurement distance is less than
26 mm.
26 30 40 50 60 70 80
20
4
Linear output (mA)
Sensing distance (mm)
Measurement range
E4DA E4DA
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■ DIRECTIONAL ANGLE vs. OPERATING DISTANCE
Note :
1. The maximum allowable inclination
angle depends on the target
object's direction of approach.
2. To reduce the influence of
inclination, use the sensor within
the detecting distance range of
30 to 50 mm.
3. If surface roughness or uneven-
ness of the detected object affects
the operation, use the input hold
function described in "Operation"
to make the output stable.
■ DETECTING ROUND OBJECTS
Use the layout below to detect round objects
when a background object is present.
θ
> 10 °
■ INFLUENCE OF TEMPERATURE VARIATION
The influence of temperature variation depends on the detecting distance.
Sensor and Amplifier at the Same
Temperature Sensor at Variable Temperature,
Amplifier at 25°C
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■ OUTPUT CIRCUIT DIAGRAM
The figures in small circles indicate
terminal numbers.
12 to 24 VDC
External gate input
15 mA max.,
12 to 24 VDC
0 V
Alarm output
80 mA, 30 VDC max.
Linear output
4 to 20 mA, load impedance 300 Ω max.
HIGH output
80 mA, 30 VDC max.
PASS output
80 mA, 30 VDC max.
LOW output
80 mA, 30 VDC max.
Connections
Terminals 1 and 2 are intentionally shorted. To use an external gate input, connect an external switching device (NPN output sensor or
no-voltage contact switch) to terminals 1 and 2.
High
(0 V)
Pass
(0 V)
Low
(0 V)
Alarm
(0 V)
0 V
12 to 24 VDC
4 to 20 mA
High (+ V)
Pass (+V)
Low (+V)
Alarm (+V)
Avoid mutual interference by placing sensors side by side,
more than 5 mm apart. Mutual interference occur when the
object is inclined or when sensors are mounted opposite one
another.
Do not use the sensor in the following environmental
conditions that adversely affect the sound wave transmission
through the air.
•Locations subject to air convection
•Locations with temperature differences within the sensing
area
•Rapid change in air flow within the operating range of the
sensor
•Use of a transceiver near the sensor
Ultrasonic sensors may not be capable of detecting sound-
absorbent materials, including: cotton, powders, foam, froth,
soft porous materials, and so forth.
Condensation or drops of water on the vibrator surface of the
ultrasonic sensor may decrease detecting distance.
A 10-minute warm-up period is required from power-up to
allow the linear output to stabilize.
Clean dust off the vibrator surface of the sensor using a blast
of air or a cotton swab. Do not apply pressure on the vibrator
surface.
■ INSTALLATION AND MAINTENANCE
PRECAUTIONS
Precautions
E4DA E4DA
111
OMRON ELECTRONICS LLC. OMRON CANADA, INC.
One East Commerce Drive 885 Milner Avenue
Schaumburg, IL 60173 Scarborough, Ontario M1B 5V8
1-800-55-OMRON 416-286-6465
Cat. No. GC MSEN4 04/01 Specifications subject to change without notice. Printed in the U.S.A.
NOTE: DIMENSIONS ARE SHOWN IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
OMRON ON-LINE
Global - http://www.omron.com
USA - http://www.omron.com/oei
Canada - http://www.omron.com/oci
