E4DA for PDF

Sensing
Ultrasonic beam
Supply voltage
12 to 24 VDC
30 to 70 mm
Output
80 mA, 30 VDC
Ultrasonic Displacement Sensor
4 to 20 mA
E4DA
Sensor’s Narrow Ultrasonic Beam Accurately
Detects Small Objects, Provides Linear
Analog Output For Inspection, Measurement
■ Narrow 5 mm ultrasonic beam detects
objects as small as 1 mm diameter at
50 mm distance with 0.2 mm resolution
■ Ultrasonic beam can detect objects
regardless of color
■ Amplifier provides three inspection
outputs–High, Pass and Low–and
4-20 mA analog output
■ Fast, 2 ms response time
■ 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
■ Includes mounting hardware and 2 m
(6.6 ft) cable
Ordering Information
Description
Ultrasonic sensor head with 2 m (6.56 ft cable)
Amplifier with three level outputs, alarm output
Extension cable between sensor and amplifier, 5 m (16.4 ft)
Part number
E4DA-LS7
E4DA-WL1C
E49-DD5
■ REPLACEMENT PARTS
Description
Sensor mounting bracket; supplied with each sensor
Part number
E39-L52
■ TYPICAL APPLICATIONS
Checking proper height of inserted
objects using external gate input to
coordinate inspection
Analog feedback for precise web
control
Measuring height of different objects
on a conveyor using external gate
input to coordinate inspection
E4DA
E4DA
E4DA
External gate input
External gate input
E4DA
E4DA
Specifications
■ SENSOR E4DA-LS7
Method of detection
Sensing distance
Minimum detectable object
Resolution
Differential travel
Directional angle
Variation due to temperature changes
Variation due to voltage changes
Indicators
Materials
Mounting
Connections
Weight
Enclosure
UL
ratings
NEMA
IEC 144
Approvals
UL
CSA
Ambient operating temperature
Ultrasonic displacement
30 to 70 mm (1.18 to 2.76 in) with 40 x 40 mm (1.57 x 1.57 in) flat object
1 mm (0.04 in) diameter at 50 mm (1.97 in) sensing distance without a background object
0.2 mm (0.008 in) at 50 mm (1.97 in)
1 to 3% of 70 mm (2.76 in) rated sensing distance
±3° max.
±4% full scale max. for output value at 25°C in ambient range of -10° to 55°C (14° to 131°F)
±2% full scale max. over operating voltage range of 10.8 to 26.4 VDC
SENSING (red LED)
Plastic case
Side surface mount with two through holes. E39-L52 bracket and mounting hardware supplied.
Cable, 2 m (6.6 ft) length, supplied
130 g (4.6 oz.)
—
2
IP66
—
—
-10° to 55°C (14° to 131°F)
■ AMPLIFIER E4DA-WL1C
Supply voltage
Operating voltage
Current consumption
Response time
External
gate input
Control
outputs
Analog
ON/OFF
Alarm
Materials
Mounting
Connection
Weight
Enclosure
ratings
Type
Signal voltage
level
Range
Linearity
Number
Type
Rating
Residual voltage
Number
Type
Rating
Residual voltage
UL
NEMA
IEC 144
Approvals
UL
CSA
Ambient operating temperature
2
12 to 24 VDC
10.8 to 26.4 VDC; ripple 10% max. peak-to-peak
200 mA
2 ms
No-voltage contact or NPN solid-state input
ON: 0 to 1 V, 1 mA minimum
OFF: 4 to 24 V, 15 mA max. or open between terminals
4 to 20 mA, 300 Ω max. load impedance
±1% full scale max.
Three (HIGH, PASS, LOW)
Optoisolated transistor outputs
80 mA, 30 VDC max.
1 V max.
One
Optoisolated transistor output
80 mA, 30 VDC max.
1 V max.
Plastic case
Two through holes for surface mounting using M4 screws
Screw terminals
230 g (8.1 oz.)
—
—
IP30
—
—
-10° to 55°C (14° to 131°F)
E4DA
E4DA
■ OUTPUT CIRCUIT DIAGRAM
The figures in small circles indicate
terminal numbers.
Linear output
4 to 20 mA, load impedance 300 Ω max.
12 to 24 VDC
External gate input
15 mA max.,
12 to 24 VDC
Alarm output
80 mA, 30 VDC max.
HIGH output
80 mA, 30 VDC max.
PASS output
80 mA, 30 VDC max.
LOW output
80 mA, 30 VDC max.
0V
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.
Alarm Low Pass High
(0 V) (0 V) (0 V) (0 V)
0V
High (+ V)
Pass (+V)
12 to 24 VDC
Low (+V)
Alarm (+V)
4 to 20 mA
Engineering Data
■ OPERATING RANGE
The operating range depends on the target object's direction of approach.
3
E4DA
E4DA
■ OPERATING RANGE (continued)
The operating range depends on the target object's direction of approach.
■ 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 unevenness of the detected object affects
the operation, use the input hold
function described in "Operation"
to make the output stable.
■ MINIMUM DETECTABLE OBJECT
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.
With Background Object
Without Background Object
X = 30 mm
X = 70 mm
X = 50 mm
4
E4DA
E4DA
■ DETECTING ROUND OBJECTS
Use the layout at right 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
Dimensions
Unit: mm (inch)
■ SENSOR E4DA-LS7
Mounting holes
32
(1.26)
9 (.35)
16 (.63)
17 (.67)
3.8 (.15)
3.2
(.13)
3.2 (.13)
18
(.71)
40
(1.57) 13
(.51)
16.9 (.67)
20
(.79)
3 (.12)
2 (.08)
3.3 (.13)
16.3 (.64)
3.5 (.14) 11.2 (.44)
13.2 (.52)
48 (1.89)
40
(1.57)
33 (1.30)
28.5
(1.12)
26
(1.02)
1.2 (.05)
* 2 m (6.56 ft) oil-resistant, vinyl-insulated, shield wire, 6 mm OD
■ OPTIONAL EXTENSION CABLE E49-DD5
33.8
(1.33)
5m
(16.4 ft)
36
(1.42)
15 (.59) dia.
5 (.20) dia.
*
* 5 m (16.4 ft) oil-resistant, vinyl-insulated, round
Outside 6 dia. 5 m
5
E4DA
E4DA
■ AMPLIFIER E4DA-WL1C
67.4 (2.65)
82.3 (3.24)
80 (3.15)
Mounting holes
74.8 (2.94)
84 ± 2
(3.31 ± .08)
16 (.63)
21.8 (.86)
17.5 (.69)
6.2 (.24)
13 (.51)
57 ± 0.3
(2.24 ± .01)
9.6 (.38)
20 (.79)
40 (1.57)
46.9
(1.85)
11.2 (.44)
12.7 (.50)
10.5 (.41)
15 (.59) dia.
Operation
■ NOMENCLATURE
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.
E4DA-WL1C Amplifier
I/O terminal
Distance set point
indicators
Sensing indicator lights when
receiving reflected sonic beam
E4DA-LS7 Sensor
Alarm output indicator
Output indicators
HIGH output
distance setting
(4 rotations)
Sensing indicator
lights when
receiving reflected
sonic beam
LOW output
distance setting
(4 rotations)
Output mode selector
switch enables 40 ms
OFF-delay timer
Connector for sensor
6
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
E4DA
■ THREE-STAGE CONTROL OUTPUT
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 proportional to
the distance to the detected object and is independent of the
distance settings.
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:
LOW range
PASS range
HIGH range
30 to 39.8 mm
40 to 60 mm
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.
26
■ 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.
Regardless of whether the gate input is 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.
7
E4DA
E4DA
■ 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 0 ms setting disables the
input hold function.
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 EXT setting provides an
extended hold period until a
new stable input value is
received.
Precautions
■ INSTALLATION AND MAINTENANCE PRECAUTIONS
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.
Avoid 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
8
Ultrasonic sensors may not be capable of detecting soundabsorbent materials, including: cotton, powders, foam, froth,
soft porous materials, etc.
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.
E4DA
E4DA
NOTE: DIMENSIONS ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
Omron Europe B.V. EMA-ISD, tel:+31 23 5681390, fax:+31 23 5681397, http://www.eu.omron.com/ema
Cat. No. GC MSEN3
2/98
Specifications subject to change without notice.
Printed in the U.S.A.
9
Download PDF