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

MANUAL • Subject to alteration! Version: June 2015
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• Rosmarter Allee 14 • 58762 Altena
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Tel [phone] • Fax [phone]
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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.

MANUAL • Subject to alteration! Version: June 2015
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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.

MANUAL • Subject to alteration! Version: June 2015
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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:

MANUAL • Subject to alteration! Version: June 2015
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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.

MANUAL • Subject to alteration! Version: June 2015
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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.

MANUAL • Subject to alteration! Version: June 2015
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• Rosmarter Allee 14 • 58762 Altena
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Tel [phone] • Fax [phone]
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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)