ipf electronic PT65 Series User manual

MANUAL • Subject to alteration! Version: June 2015
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PT65002x
Laser-Distance-Sensors
Table of Contents
1 General Notes....................................................................................................................................... 2
2 Functional Principal .............................................................................................................................. 3
3 Mounting Instructions .......................................................................................................................... 3
4 Application hints .................................................................................................................................. 8
5 Teaching of the Measuring Range ....................................................................................................... 10
6 Technical Data ................................................................................................................................... 16
7 Connection diagram and pin assignment ............................................................................................ 18
8 Grounding Concept ............................................................................................................................ 19
9 Service Notes ..................................................................................................................................... 19
10 Accessories ........................................................................................................................................ 19
11 Troubleshooting ................................................................................................................................. 20

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1 General Notes
Rules for proper usage
This product is a precision device which has been designed for the detection of
objects and parts. It generates and provides measured values issued as electrical
signals for following systems.
Unless this product has not been specifically marked it may not be used in hazard-
ous areas.
Set-Up
Installation, mounting and adjustment of this product may only be executed by
skilled employees.
Installation
Only mounting devices and accessories specifically provided for this product may
be used for installation.
Unused outputs may not be connected.
Unused strands of hardwired sensors must be isolated. Do not exceed the maxi-
mum permissible bending radius of the cable.
Before connecting the product electrically the system must be powered down.
Where screened cables are mandatory, they have to be used in order to assure
EMI protection. When assembling connectors and screened cables at customer
site the screen of the cable must be linked to the connector housing via a large
contact area.
Laser Safety
•The laser diode installed in the PT65 emits visible red laser lights. This laser belongs to the Class 2 laser standard
specified by the IEC 60825-1.
•Max. average output power < 1 mW.
•Laser radiation, do not stare into beam.
•To avoid uncontrolled laser exposure we recommended stopping the beam with a matte object.
•For laser safety reasons, the voltage supply of the sensors must be turned off when the whole system or the
machine is turned off.
•Safety concept information and limiting parameters as published in the sales documentation apply at all times.

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2 Functional Principal
The distance measured is based on the triangulation principle. The emitted laser beam falls on the object as a small
light spot and will be reflected diffusely. The position of the received light spot on the receiver (a diode line) defines
the receiving angle. This angle corresponds to the distance and is the base for the internal calculations.
A distance change close to the sensor effects a large change in angle; the same distance change at the end of the
measuring range has a much smaller effect to the angle. This non-linearity feature is linearized by the microcontroller.
The analog output signal is linear to the distance..
The sensor adapts automatically to different object colors by varying the emitting laser intensity and
optimizing the exposure time. The result is a sensor that is nearly independent on different reflections (different colors,
shiny surfaces, dark objects). The sensor reaches its highest accuracy if the object reflects diffusely.
3 Mounting Instructions
•For a proper mounting, the mounting surface has to be flat. Be aware of the max. tightening torque.
•In case of EMC, the sensor has to be grounded and a shielded cable has to be used.
•The 90° rotating connecter allows wiring the sensor from the bottom side or from the rear.
•The max. accuracy will be reached >15 minutes after power on.

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Steps / Edges:
When measuring right next to steps / edges, it is important that the receiving beam is not covered by the steps /
edges. This also applies to depth measurements of holes or valleys.
Mounting above shiny surfaces:
On shiny surfaces, it is important that no direct reflection can get to the receiving optics.
The reflection could blind the sensor and produce poor results. To prevent this, the sensor may be slightly tilted. The
direct reflection can be seen on a white piece of paper when held in front of the receiver.
Mounting above round, shiny surfaces:

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Shiny objects with a constant structure:
Especially shiny objects with a constant structure (lathed or scuffed objects, extruded aluminum profiles, etc.) could
have a negative effect on the measuring result.
Objects with color edges in the same direction:
When color edges are orientated in the right direction, the effect to the measuring result will be minor. If the color
edges are in the wrong direction, the effect will depend on the reflectivity of the different colors.
Profile measurement:
For profile measurements, the sensor axes should be perpendicular to the moving direction.

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Several sensors without mutual optical interferences:
Several sensors, when mounted next to the other, can affect each other. When mounting a sensor, be aware that
no laser spot from another sensor is in the receiving field.
When mounted side by side (as shown in the picture in the middle), sensing distances up to 600mm can be achieved.
Ambient Light
Be careful that no strong light source faces the receiving field.
Measuring Range Measuring
Range
Mutual
Interference

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3.1 Measuring Field
PT650025 / PT65002E PT650026 / PT65002F
PT650027 / PT65002G PT650028 / PT65002H

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4 Application Hints
To reach the maximum accuracy of PT65 series laser distance sensors, keep an eye on the following points:
Measuring on rough surfaces
All laser distance sensors are adjusted and linearized on a reference object. The object is a white ceramic sheet with
an absolutely flat surface.
Many objects have a surface structure that is within the resolution of the sensor or rougher. In such a case, the
sensor with its small laser spot measures the distance including the structure in contrast to a slide gauge that
measures an average.
For such applications, we recommend to use a laser distance sensor with a laser line (PT66302x).
What can you do if you have color edges?
Often objects have several color edges on the surface.
For example:
Text Pictures Grooves Rust Marble
In the field, you have no guarantee that the spot is not falling on just a color edge that can cause a measuring fault.
Also, when the object moves, you may get an incorrect signal for each color edge (it appears that the signal is unsta-
ble or has spikes)
In such cases, we suggest to move the object (or sensor), take several measurement values and calculate the aver-
age. The quantity of measurement values depends on the structure, the moving speed and the accuracy you desire.
Other possible solutions:
Use a sensor with the laser line (PT66302x).
PT65

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What can you do if you have transparent, semi-transparent and highly reflective objects?
The measuring principle desires an object that reflects the light diffusely. Semi-transparent, transparent and highly re-
flective objects do not have this feature.
•When measuring on semi-transparent objects, the light enters the object and so the measured distance is larger
than the actual distance is.
•Light will pass through a transparent object so a measuring signal is not available.
•A highly reflective object only has a direct reflection and it is not possible to work with it. For such an application,
ask the ipf electronic sales staff.
to measure these objects, it is only possible if you place a diffuse reflecting surface on the object (sticker, etc.)
Semi transparent objects:
the light enters the object.

the measured distance is larger
than the real distance
Transparent objects:
The light passes the object without a
diffuse reflection.
No measurement is possible
Highly reflective objects:
Only direct reflection
No measurement is possible.

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5Teaching of the Measuring Range
Every sensor is delivered with the factory setup (max. measuring range). The teach-in feature was designed to
choose a smaller range within the nominal measuring range for optimizing the resolution and linearity. Output cur-
rent, voltage and alarm output adapt to the new range. Two positions must be taught.
•The first teach-in position aligns with 0V (or 4mA), the second position aligns with 10V (or 20mA)
•These teach-in positions are always just at the border of the new range (inside the measuring range)
•The sensor may be taught more than 10,000 times in its lifetime
•The sensor can always be reset to the factory settings
•The sensor may be taught with the teach button or via the external teach input
•During the teach-in process, the red LED provides a feedback
•The red LED on the back side of the sensor indicates “run” mode if an object is within the measuring range.
Attention:
Within 5 minutes after power on, the sensor can be taught via the button or the teach-in wire. After 5 minutes, the
teach-in button will be locked preventing accidental adjustment. The teach-in wire is active all the time.
Example of a taught measuring range (4mA / 0V near, 20mA /10V far)
Example of a reverse taught measuring range (4mA / 0V far, 20mA /10V near)

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PT650025 / PT65002E
Typical Resolution Typical linearity error
Sr = taught measuring range Sr = taught measuring range
PT650026 / PT65002F
Typical Resolution Typical linearity error
Sr = taught measuring range Sr = taught measuring range

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PT650027 / PT65002G
Typical Resolution Typical linearity error
Sr = taught measuring range Sr = taught measuring range
PT650028 / PT65002H
Typische Auflösung Typische Linearitätsabweichung
Sr = geteachter Messbereich Sr = geteachter Messbereich

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5.1 How to teach a new range using the teach button
Teaching a new measuring range:
Within 5 minutes after power-up, the button may be used to teach a new range. After finishing a teach procedure, the
5 minutes start again. After the 5 minutes, the sensor does not respond to pressing the button. Seven steps to teaching
a new measuring range.
1. Press (and hold) the button. The red LED will turn on, if the sensor can be taught.
2. Hold down the button for 5 more seconds. The LED will start to blink.
3. Release the button.
4. Place a target at the first new position of the measuring range. This is the position that will later produce 0V (or
4mA).
5. Briefly press the button again. The LED will stop blinking and will stay on for about 3 sec to indicate that the first
position has been stored. Then the LED will blink again.
6. Now place the target at the second position (the other end of the new range), which will produce 10V (or 20mA).
7. Briefly press the button again. The LED will stop blinking and will stay on for about 3 sec to indicate that the second
position has been stored. The LED will then turn off and blink once more. Now the sensor is ready to measure.
The new, smaller operating range is now set. The red LED now indicates whether an object is within the new range (LED
OFF) or not (LED ON). If one of the new borders of the range was outside the standard range or the two positions were
too close to each other, then the new settings are not valid. The sensor will respond with an extended blinking at the
end of the teach procedure. The previous settings are still valid and the new settings are lost.

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5.2 How to reset the factory settings using the teach button
Within 5 minutes after power up, the button may be used to reset the sensor back to the factory settings. After
finishing a teach procedure, the 5 minutes starts again. After the 5 minutes, the sensor does not respond to pressing
the button.
1. Push the button. The red LED will turn on, if the sensor can be taught.
2. Hold down the button further 5sec. The LED will start to blink. DO NOT RELEASE the button now. Wait another
10sec until the LED is ON without blinking. Factory settings have been restored to the sensor.
3. Release the button.
5.3 How to teach a new range using the external teach input
Teaching the sensor via the external teach input is equivalent to the teaching procedure via the button.
Connect the external teach input line to +VS(brown line) instead of pressing the button. There is no 5min. time limit.
The sensor may be taught at any time After finishing the teach-procedure, connect the external teach input line to
0V.
input circuit:

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5.4 How to reset the factory settings using the external teach input
To reset the sensor to factory settings via the external teach input is equivalent to the rest procedure via the button.
Connect the external teach input line to +VS(brown line) instead of pressing the button. There is no 5min. time limit.
The sensor may be taught at any time After finishing the teach-procedure, connect the external teach input line to 0V.
Time
Description of timing functions
Value
Comment
t 1
Minimum button hold time to enter teach
mode 5s
Using the button, this feature can only be
used within 5 minutes after power-up. Using
the external teach input, it may be used at
any time.
t 2
Maximum waiting time after teaching the
first position < 20s
If the button has not been pushed during this
interval, the sensor will leave th
e teach
mode without any changes.
t 3 LED on as response for the first position ca. 3s
t 4
Maximum waiting time after teaching the
second position < 20s
If the button has not been pushed during this
interval, the sensor will leave the teach
mode without any changes.
t 6
LED Blinking for “NOT OK response” after
teaching the second position
ca. 5s
t 7 Additional high time for the external teach in 0,1 … 1s
t 8
Pulse lengths on external teach input for first
position
30 … 2000ms
t 9
Pulse lengths on external teach input for sec-
ond position
30 … 2000ms
t 12
Minimum blinking time for the reset to fac-
tory settings with button
10s
t 13 Blinking time after reset to factory settings >0,2s
As long as the button is down or the external
teach input is high
t 14
Minimum blinking time for the reset to fac-
tory settings with external teach input
10s
t 15
Minimum high time of the external teach in-
put after LED stops blinking for reset to fac-
tory settings
0,2s

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6 Technical Data
6.1 Devices with analog output 4 … 20mA
PT650025
PT650026
PT650027
PT650028
Measuring Range
30 … 70mm
30 … 130mm
50 … 300mm
100 … 600mm
Min. Teach-in range
≥ 2mm
≥ 3mm
≥ 5mm
≥ 10mm
Resolution *1)
4 … 20µm
5 … 60µm
0,01 … 0,33mm
0,015 … 0,67mm
Linearity error *2)
±12 … ±60µm
±15 … ±200µm
±0,03 … ±1,0mm
±0,05 … ±2,0mm
Response time *3)
300 … 900µs
300 … 900µs
300 … 900µs
300 … 2800µs
Interference suppression *4)
+
+
+
+
Transmitting element
Laserdiode, red, pulsed
Laser Class
2
Wave lenght
650nm
Diameter of laser spot *7)
1 … 0,2mm
2 … 1mm
2mm
2mm
Analog output
4 … 20mA
Load resistance (max.)
< (+VS-6V) / 0,02A (900Ω @24V)
Operating voltage
12 … 28V DC
Current consumption
< 100mA
Reverse polarity protection
+
Short circuit protection
+
Housing material
Die-cast zinc
Tightening torque (max)
1,0Nm
Ambient light *6)
< 50kLux
< 40kLux
< 8kLux
< 10kLux
System of Protection (EN 60529)
IP 67
Operating Temperature
0 … +50°C (non condensing)
StorageTemperature
-20 … +70°C
Temperature coeffizient (typ.)
*5)
±0,015% ±0,03% ±0,03% ±0,03%
*1) and *2) measured on white ceramic sheet
*3) The response time depends on the reflectivity of the object. For objects with a reflectivity < 7% the
response - / release time of the PT650028 is increased automatically up to 2.8ms.
*4) Missed measurements up to 30 cycles will bie suppressed. During this time the analog ouput stays on
hold.
*5) xx % of full scale measuring range / °C
*6) Maximum sunlight on a white measuring surface
*7) dimension of laser beam:

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6.1 Geräte mit Spannungsausgang 0 … 10V
PT65002E
PT65002F
PT65002G
PT65002H
Measuring Range
30 … 70mm
30 … 130mm
50 … 300mm
100 … 600mm
Min. Teach-in range
≥ 2mm
≥ 3mm
≥ 5mm
≥ 10mm
Resolution *1)
4 … 20µm
5 … 60µm
0,01 … 0,33mm
0,015 … 0,67mm
Linearity error *2)
±12 … ±60µm
±15 … ±200µm
±0,03 … ±1,0mm
±0,05 … ±2,0mm
Response time *3)
300 … 900µs
300 … 900µs
300 … 900µs
300 … 2800µs
Interference suppression *4)
+
+
+
+
Transmitting element
Laserdiode, red, pulsed
Laser Class
2
Wave lenght
650nm
Diameter of laser spot *7)
1 … 0,2mm
2 … 1mm
2mm
2mm
Analog output
0 … 10V
Load resistance (min.)
> 100kΩ
Operating voltage
12 … 28V DC
Current consumption
< 100mA
Reverse polarity protection
+
Short circuit protection
+
Housing material
Die-cast zinc
Tightening torque (max)
1,0Nm
Ambient light *6)
< 50kLux
< 40kLux
< 8kLux
< 10kLux
System of Protection (EN 60529)
IP 67
Operating Temperature
0 … +50°C (non condensing)
StorageTemperature
-20 … +70°C
Temperature coeffizient (typ.) *5)
±0,015%
±0,03%
±0,03%
±0,03%
*1) and *2) measured on white ceramic sheet
*3) The response time depends on the reflectivity of the object. For objects with a reflectivity < 7% the response
- / release time of the PT65002H is increased automatically up to 2.8ms.
*4) Missed measurements up to 30 cycles will bie suppressed. During this time the analog ouput stays on
hold.
*5) xx % of full scale measuring range / °C
*6) Maximum sunlight on a white measuring surface
*7) dimension of laser beam:

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Dimensions
7 Connection diagram and pin assignment
Connection diagram Pin assignment
1: +UB
2: analogue Output
3: 0V
4: n.c.
5: Teach-in

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8 Grounding Concept
For maximum EMC protection and reliable application, use a shielded cable. Also, the sensor has to be grounded.
We recommend the grounding concept as shown in the picture. Ground the sensor with a toothed washer between
the screw head and the sensor.
9 Service Notes
The PT65 requires no maintenance apart from keeping the front windows clean. Dust or fingerprints can impair the
sensor function. It is normally sufficient to wipe the windows dry with a clean (!), soft cloth. Alcohol or soapy water may
be used for heavy soiling.
10 Accessories
Connecting cable, straight, shielded: 2m VK205625
5m VK505625
10m VKA05625
Mounting bracket:AP000031
Protective cover (Material: Acrylic glass) AP000041
PT65

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11 Troubleshooting
Error
Possible Reason
Correction
The sensor does not
Measure.
The teach-in wire is connected to
+Vs.
Connect the teach-in wire to 0V.
The receiving beam is covered by an
object / edge / step.
Make sure, that no object is in the receiving
field.
No receiving signal (transparent or
highly reflective object)
Make sure, that the laser spot falls on a dif-
fuse reflecting surface.
The sensor has incorrect
measuring values.
Mutual optical interferences be-
tween two or more sensors
Make sure, that no other light spot is within
the receiving field of the sensor.
Strong ambient light
Prevent ambient light with a shield
Semi transparent, transparent or
highly reflective objects
Make sure, that the laser spot falls on a dif-
fuse reflecting surface.
The sensor does not
reach the accuracy.
Rough surface
Possibly use a sensor with laser line
(PT66302x).
Color edges
Mount the sensor the correct way.
Resolution of the A/D converter in
the control unit
Read the manual of the control unit.