LASER
Analogue Laser Displacement Transducer
Series
LAS
LAM
• Range 0,5 up to 800 mm
• Resolution up to 0,1 µm
• 4...20 mA/ 0...10V analogue output and pnp-switch
in one unit, RS485
• Spot or line beam
• Linearity ±2% µm
• Wavelength 675 nm
• Reverse polarity and short circuit protection (LAS-Series)
• Intelligent stand alone solution (no additional equipment
needed)
• Protection class IP67
• Precise distance measurement on different surfaces
• Frequency response up to 40 kHz (LAM-Series)
• Working temperature up to 90° C
04.06.09
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Outline LAS-Series
LAS-laser sensors cover a measurement range from 30 to The visible laser spot allows an easy and exact adjustment of the
1000mm. The internal micro controller gives a precise output sensor. When target surfaces are rough, the laser beam can be
signal, which is proportional to the distance to be measured. widened to a fine line to average the received signal and ensure
No external electronic device is needed. An intelligent on-board reliable results.
signal conditioning unit enables the sensor to measure
accurately on different target colours and surfaces.
Principle LAS-Series
The distance measurement is based on the triangulation The receiver of the sensor is a photo diode array (a PSD
principle: The laser beam hits the target as a small spot. element for faster response). The readout of the photo diode
The position of this spot is detected by the receiver. Then array is handled by an internal micro controller. The controller
the sensor can measure the angle and calculate the calculates the precise angle from the light allocation in the
distance to the target. photo diode array. The exact distance to the target is
calculated from the angle value. This distance is either
transmitted to the serial port or converted into an output current
which is proportional to the distance. The micro controller
guarantees a high linearity and accuracy. The combination of
photo diode array and micro controller allows a minimum of
undesirable reflections. Thus a precise distance measurement is
possible even on critical surfaces.
By changing the internal sensitivity, the sensor adapts to
blind range
different colours and is therefore nearly independent from target
area
colours.
The possible resolution and accuracy change with the In case of no target within the measurement range or insufficient
distance d: if d is close to the sensor, a greater angular light intensity, a digital output is activated (e.g. for pollution of the
change a1 is measured. If d is further from the sensor, a sensor).
much smaller angular change a2 occurs (see sketch).
a2
a1
d d
Laser Beam Types LAS-Series
Laser spot Laser line
The object is detected by a precisely focused laser The object is detected by a fine laser line.
beam. Typically used for thickness- and position measurement on rough,
This is the most popular type for LAS applications. porous surfaces.
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Technical data LAS-Z
Wiring diagram 4...20 mA / 0...10 V * Wiring diagram RS485 (with K8P2M only)
+Vs brown (1) Vin brown
Alarm output white (2) GND blue
GND blue (3) Switching output yellow
4...20 mA black (4) Alarm output grey
0...10 V grey (5) Rx/Tx+ pink
Rx/Tx- white
* Automatic output switch:
Depending on the connected impedance in the output, the voltage or power supply is
activated.
The output has to be wired up before connecting to the operating voltage.
Technical data
Typ LAS-Z-20 LAS-Z-100 LAS-Z-120 LAS-Z-200 LAS-Z-400 LAS-Z-800
Range 30...50 mm 30...130 mm 200...320 mm 50...250 mm 100...500 mm 200...1000 mm
Resolution 0,01 mm 0,06 mm 0,2 mm 0,3 mm 0,5 mm 3 mm
Linearity ± 0,03 mm ± 0,2 mm ± 0,6 mm ± 0,9 mm ± 1,5 mm ± 12 mm
Response time < 10 ms
Sensing element Photo diode array
Alarm output PNP
Sw itching current 100 mA
Pow er indicator LED green
Alarm indicator LED red
Pollution indicator LED red flashing
Supply 12 - 28 VDC
Max. current < 120 mA
Light source Laser diode, red, pulsed
Laser class 2
Wave length 675 nm
Reverse polarity Yes
Short circuit prot. Yes
Housing material Die-cast zinc
Protection class IP67
Working temp. 0...+50°C
Beam type
Spot laser (Ø) 1,0...0,4 mm 2,0...1,0 mm 2,0 mm 2,0 mm 2,0 mm 2,0 mm
Line laser
Beam height 2 mm 3,0...5,0 mm - 4,0...10,0 mm 5,5...18,0 mm 8,5...35,0 mm
Beam w idth 1,0...0,4 mm 2,0...1,0 mm - 2,5 mm 2,5 mm 2,5 mm
Output
Analogue output 4...20 mA / 0...10 V, optional
RS 485 Optional (w ithout analogue output)
Baud rate Standard 19200 Baud
Start / stop Bits 1 start Bit, 1 stop Bit
Data length 8 Bits
Parity None
Mode Half duplex
The technical data (for linearity and response time) applies to a mat white object surface.
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Technical data LAS-TM/LAS-T (teach-in)
Wiring diagram 4...20 mA / 0...10 V
LAS-T LAS-TM
+Vs brown (2) brown (1)
n.c. white (1)
4...20 mA* green (3) black (4)
0...10 V* pink (6)
Alarm grey (5)
Teach-in yellow (4) white (2)
Synchro-in red (8)
0V blue (7) blue (3)
* Automatic output switch:
Depending on the connected impedance in the output, the voltage or power supply is
activated.
The output has to be wired up before connecting to the operating voltage.
Technical data
Typ LAS-TM-10 LAS-TM-104 LAS-T-40 LAS-T-250 LAS-T-500 LAS-T-800
Range 16...26 mm 16...120 mm 30...70 mm 50...300 mm 100...600 mm 200...1000 mm
resolution 0,002...0,005 mm 0,002...0,1 mm 0,004...0,02 mm 0,02...0,35 mm 0,03...0,6 mm 0,03...0,7 mm
Linearity ±0,006...±0,015 mm ±0,006...±0,35 mm ±0,012...±0,06 mm ±0,03...±1 mm ±0,05...±2 mm ±0,07...±2,5 mm
Min. teach-in range 1 mm 2 mm 2 mm 5 mm 10 mm 10 mm
Response time <0,9 ms < 10 ms
Sensing element photo diode array
Alarm output - - PNP
Sw itching current - - 100mA
Pow er indicator LED green
Alarm indicator LED red
Pollution LED red flashing
Supply 12 - 28 VDC
Max. current < 100 mA < 120 mA
Light source Laser diode red, pulsed
Laser class 2
Wave length 675 nm
supp reverse polarity yes
Short circuit protection yes
Housing material Die-cast zinc Aluminium
Protection class IP67
w orking temerature 0...+50°C
Beam type
Laser spot ( Ø ray ) 0,5...0,2 mm 0,9...0,5 mm 1...0,2 mm 2,0 mm 2,0 mm 2,0 mm
Output
Analogue output 4...20 mA 4...20 mA / 0...10 V, w ahlw eise
The technical data (for linearity and response time) applies to a mat white object surface.
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Technical drawings and characteristics LAS-Series
LAS-TM LAS-T-250-A
LAS-T-250/500
LAS-Z
LAS-T-500-A
LAS-T-800
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Outline LAM-Series
The optical distance sensor LAM is used in the field of non-contact measuring
technology. The LAM distance sensors are manufactured for a wide range of
specifications, so that for each application there is a suitable sensor available.
Due to the fast response time of the output signal (0,1 ms, down to 40 µs on
request) this series is particularly suitable for high dynamic measurements. The
high resolution (down to 0,1 µm) guarantees a reliable application for
demanding measurements for quality control.
Description LAM-Series
The optical displacement sensors of the LAM-series are designed for non-contact detection of the position or presence of objects.
They measure the distance of objects according to the principle of triangulation in the range of 0,5 - 100 mm. The analogue output is
a linear voltage representation of the deviation from the reference distance and has the range of ± 10 VDC, optional 0-10V, ± 5 VDC or
4-20 mA.
The reference distance corresponds to the middle of the measuring range. A light spot is focused on the object to measure. The
sensor transmits pulsed light, thus the signal is mostly independent of ambient light.
The diffusely reflected light spot is directed to a PSD through a lens. The intensity of the light source is adjusted automatically,
according to the reflectance of the surface.
If the intensity of the reflected light is too low, failure F1: “not enough light” is displayed.
Highly reflective surfaces, which reflect the transmitted light directly into the PSD, will lead to failure F2: “too much light”. Both failures
are displayed by separate LEDs and reported as logical output signals. As additional information on the lighting conditions a voltage
output of the light intensity is available.
The output voltage “distance” at Pin 1 is directly proportional to the object distance. Distance limits for the object distance can be set
with two comparators to distinguish between too close / OK / too far. LEDs display the present status with 3 optional relay outputs
available.
Self test
A continuously running built-in mechanism guarantees the permanent monitoring of the intensity of the reflected light to check whether
the object is located within the measuring range.
Response time and frequency range
The rise time of the output signal of the laser sensors is exceptionally fast. It averages to 100 µs for the LAM to reach >90% of the
final value (or 40µs on request). The rise/ integration time can be increased to 0.2 , 2 or 20 ms by DIP switches inside the electronic
module. This reduces the noise level and improves the accuracy of the measurement. For a precise adjustment of this integration time
both switches of the respective time have to be set on ON (see chart), all other switches on OFF.
Mounting the sensor head
To achieve optimal results it is important to mount the sensor in a 90° angle to the object surface, otherwise the path of the laser beam
is elongated.
The LAM laser head should be mounted in such a way that the laser beam cannot be directed or reflected in the human eye.
The visible warning label (included in delivery) should be installed close to the sensor.
To adjust the sensor the LEDs MIN, OK and MAX may be used.
At the delivery MIN and MAX values are preset on the measuring range limits. As long as the OK-LED is illuminated, the object is
within the measuring range and reflects enough light.
The zero voltage adjustment should be done mechanically first, then, for fine tuning the zero-potentiometer R4 may be used, which
can be adjusted with a screwdriver to approx. ± 5 % of the range.
For an alignment of the different slopes of the output characteristics due to specific object surfaces, the amplification-potentiometer R5
may be used.
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Description LAM-Series
Surface related measurement deficiencies
Impairment by materials and colours
The objects to be measured can be made of nearly all materials, e.g. metal, plastics, ceramics, rubber and paper. Only the application
with highly reflective objects or liquids should be subject to special consideration.
Reflectance of the surface
The sensor needs a minimum diffuse reflection of 10% to perform correctly. Diffuse reflection only is usable for measurements.
Stray light
The projected light beam results in a small amount of stray light, which will be reflected by the object surface around the light spot and
received by the sensor. Highly reflective surfaces around the light spot may cause the stray light to be directly reflected into the sensor
and errors can occur.
Homogeneous surfaces with consistent reflecting properties do not cause such failures. If the shiny area is outside the light spot,
failures are < 2%.
Penetration of the light beam into the object
Transparent plastic or cloudy liquids will allow the light beam to penetrate up to a certain depth, before being reflected. This depth has to
be added to the measured distance and can only be verified by some additional experiments with the material.
Striped objects
For objects with light / dark stripes (e.g. wood) the sensor
should be mounted with its optical centre line parallel to the
stripes (see sketch ). Due to their smaller light spot LAM /
LASER sensors are most suitable for these applications.
Bright / dark contrast within the light spot
If there are surface areas with different reflectances joining at
the light spot, the maximum light is not reflected from the centre
of the spot and thus measurement errors may occur. However,
this influence is minimised if the transition boundary lies parallel
to the optical axis (see sketch).
O ptical axis
Changes in reflection intensity during measurement
The amount of light emitted from the LAM will automatically be
adjusted to the reflective properties of the materials.
O bject surface
striped
Angle dependence of measurements
There is a small angle dependence if the sensor is not
mounted at right angles with the object surface. This
dependence is very small for mat surfaces with high diffuse
reflection and slightly greater for shiny surfaces.
15°
An off-axis angle from axis A of up to 30° does not result in a
significant measurement error, from axis B a rotation of up to
15° is possible. R otation axis
The measurement error arises as a changing of the A
relationship between output voltage and distance. If the angle 30°
of rotation is constant, it can be eliminated by readjusting the O bject surface
values.
R otation axis
B
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Technical data LAM-Series
Type LAM-0,5 LAM-2 LAM-10 LAM-20 LAM-50 LAM-100
Range 23,75...24,25 mm 23...25 mm 40...50 mm 55...75 mm 95...145 mm 170...270 mm
Resolution 0,2 µm 0,4 µm 5 µm 9 µm 30 µm 60 µm
Linearity ± 1 µm ± 4 µm ± 20 µm ± 40 µm ± 100 µm ± 200 µm
Response time 0,1 ms; 0,14 ms; 0,25 ms; 1 ms; 4 ms; 10 ms; 40 ms; 67 ms
Sample frequency 54 kHz
Sw itching output MIN (LED yellow ); MAX (LED orange ); OK (LED green ); 24 V / 10 mA
Current consumption 10 mA (not available for Relay option)
Pow er indicator LED green
Alarm indicator LED red (too much light)
Reflected light 0 V to 10 V
Pow er supply 24 VDC / 200 mA (10 bis 30 V)
Humidity up to 90 % RH
Light source Laser diode, red, pulsed
Laser class 2
Wave length 670 nm
Isolation voltage 200 VDC, 0 V ground to housing
Max. vibration 5 g to 1 kHz (20 g optional)
Housing material Aluminium
Protection class IP64 (sensor) IP40 (electronics)
Working temperature 0...+50°C
Beam type
Spot laser (Ø) 0,1 mm 0,2 mm 0,6 mm 0,9 mm 1,5 mm 1,5 mm
Output
Analogue output ±10 V; 4 - 20 mA; RS232
Impedance approx. 0 Ohm
Temp. coefficient 0,02% / ° K
External electronics inclusive
The technical data (for linearity and response time) applies to a mat white object surface.
Pin connection electronic module
LAM with 24V output Dip-switches
Pin SW1 Function
On RS 232 Software Trigger with RXD
1 Distance output, ±10V Off durationmode Stopp with RTS
2 Not enough light, +24V/ 10 mA
3 Laser OFF, 0 V SW2 Function
4 TXD On RS 232 transfer rate = 38,4 kBaud
5 Range OK, output, +24V/ 10 mA Off RS 232 transfer rate = 115,2 Kbaud
6 4 – 20 mA
7 RXD SW3 out of use
8 0 V supply
SW4 SW5 SW6 F/ kHz T/ ms
14 Analogue output GND
On on on 10 0,1
16 MAX, +24V/ 10 mA
Off on on 7 0,14
17 Sensor 2, input
On off on 4 0,25
18 RTS Off off on 1 1
19 MIN, +24V/ 10 mA On on off 0,25 4
20 Light intensity 0-10V Off on off 0,1 10
21 +24 V supply On off off 0,025 40
Off off off 0,015 67
Connector type: 25pin D-connector SW7 SW8 Function
On on normal-laser off, if I/ 0 = GND
Off on Trigger with I/ 0 = GND
On off Sensor = Master
Off off Sensor = Slave
Adjustment 4 kHz
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Technical drawings LAM sensor heads
Sensor head type 50 / 100 Sensor head type 2 / 10 / 20 Sensor head type 0,5
2 m cable output: sensor - electronics
Electronic circuitry LAM electronic module
102
27,5
92 4
8
4,4
Sichtseite
74
64
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Accessories LAM-Series
LAM-SG-S1 LAM-SG-T1
74
74
63 58
63 58 Compressed air
5,5 Cable 5,5 cable
Sensor head Sensor head
52
Holes for M 4 screws 52
80 Holes for M4 screws
80
14
12,5
14
12,5
Glass
20,5 26
Beam output
20,5 Beam output 26
LAM-SG-S2 LAM-SG-T2
125 125
119 58 119 58
Compressed air
Cable Cable
Sensor head Sensor head
80 80 Holes for M4 screws
Holes for M4 screws
6 6
66 66
14 14 23
23
Glass 31
21 23,5 21
23,5 Beam output
Beam output
Protection housing for LAM sensors
For applications at a high pollution level or temperatures over 50°C a protection housing should be used.
There are housings with an air cooling system with an airstream that prevents any dust from entering through the shelter opening.
LAM-SG-S1
Protection housing for LAM-2/10 with scratch resistant glass window for applications at a high pollution level
LAM-SG-S2
Protection housing for LAM-50/100 with scratch resistant glass window for applications at a high pollution level
LAM-SG-T1
Protection housing for LAM-2/10 with air connection for temperatures up to 50°C
LAM-SG-T2
Protection housing for LAM-50/100 with air connection for temperatures up to 50°C
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Order code LASER-Series
Fast laser with high resolution: LAM
Range Logical output
23,75...24,25 mm 0,5 K 0V / 24 V
23...25 mm 2 R Relay
40...50 mm 10
55...75 mm 20
95...145 mm 50
170...270 mm 100
Output voltage
-10/10 V 10/10
10 V (0...10 V) optional 10V
420 A (4...20mA) optional 420A
Laser with high resolution: LAS
Type Output
Spot laser Z
A 4...20 mA / 0...10 V
Line laser L
RS485 RS485
Range (spot and line laser)
30...50 mm 20
30...130 mm 100
200...320 mm* 120
* LAS-Z-120 available in option A only
50...250 mm 200
100...500 mm 400
200...1000 mm 800
Options
LAS-L-XX Linienlas er
RS485 LAS-Z / L-XX-RS485
5-polige Kabeldose inkl. 2 m Kabel
5-polige Kabeldose inkl. 5 m Kabel
8-polige Kabeldose inkl. 2 m Kabel
8-polige Kabeldose inkl. 5 m Kabel
We reserve the right to alter the specification without prior notice
WayCon Positionsmesstechnik GmbH Head Office Office Cologne
e-mail: info@waycon.de Mehlbeerenstr. 4 Auf der Pehle 1
internet: www.waycon.de 82024 Taufkirchen 50321 Brühl
Tel. +49 (0)89 67 97 13-0 Tel. +49 (0)2232 56 79 44
Fax +49 (0)89 67 97 13-250 Fax +49 (0)2232 56 79 45
