ASTECH LDS70A User manual

User Manual
LDS70A
Firmware Version 3.3X
Version 1.1

LDS70A User Manual
Page 2 ASTECH GmbH
Dear User,
You are advised to carefully read this User Manual before turning on the Laser
Distance Sensor LDS70A for the first time.
This is necessary to ensure that you will be able to use all the capabilities and
features provided by your new purchase.
This product is subject to ongoing technological developments.
Editorial deadline: April 2020
Firmware version: ≥3.3
Manual version: V 1.1
File: Manual_LDS70A_EN_V1.1.docx
Note:
Proper care has been used in compiling this document. No liability will be
accepted in the event of damage resulting from the failure to comply with the
information contained herein.
ASTECH GmbH, Schonenfahrerstr. 5, D-18057 Rostock
Internet: www.astech.de E-Mail: [e-mail]
Telephone: +49 (0)381 / 44073-0 Telefax: +49 (0)381 / 44073-20

LDS70A User Manual Contents
ASTECH GmbH Page 3
Revision History
Manual Version
Date
Changes
1.1
02.04.2020
Revision of Figure 5 and
some errors
1.0
04.02.2020
Created

LDS70A User Manual Contents
ASTECH GmbH Page 4
I. Content
1General Information..............................................................................8
2Safety advice .........................................................................................9
2.1 Basic safety advice ............................................................................9
2.2 Advice for operating device.............................................................10
2.3 Norms.............................................................................................12
2.4 Disposal ..........................................................................................12
3Operating conditions...........................................................................13
3.1 Electrical installation conditions ......................................................13
3.2 Operating and storage conditions....................................................13
3.3 Appropriate use ..............................................................................14
3.4 Improperly use –error sources........................................................14
4Device description...............................................................................16
4.1 General information........................................................................16
4.2 Technical data.................................................................................16
4.3 Laser beam image...........................................................................18
4.4 Mechanical Installation ...................................................................19
4.5 Electrical Installation.......................................................................20
4.6 Status LED.......................................................................................21
4.7 Serial interface RS232 .....................................................................22
4.8 Serial interface RS422 .....................................................................23
4.9 Digital interfaces Q1, Q2 .................................................................24
4.10 Analogue current output QA ...........................................................25
4.11 Trigger ............................................................................................27
5Parameter setup and measurement ....................................................29
5.1 General information........................................................................29
5.2 Transmission protocol.....................................................................29
5.3 Identification ..................................................................................30
5.4 Operation modes............................................................................32
5.5 Status .............................................................................................33
5.6 Parameter.......................................................................................36
6Error processing...................................................................................56
7EG Declaration of conformity ..............................................................58

LDS70A User Manual Contents
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II. List of Figures
Figure 1 : LDS70A dimensions....................................................................... 19
Figure 2: M12, 12-pin cable socket - pin page (front view) ............................ 21
Figure 3: Wiring with serial interface RS232.................................................. 22
Figure 4: Wiring with serial interface RS422.................................................. 23
Figure 5: Wiring of Q1, Q2............................................................................ 24
Figure 6: Wiring of QA.................................................................................. 26
Figure 7: Wiring of trigger output ................................................................. 27
Figure 8: Wiring of trigger input.................................................................... 28
Figure 9: Analog output behaviour ............................................................... 42
Figure 10: Switching behavior of Q1 and Q2 ................................................. 45

Contents LDS70A User Manual
Page 6 ASTECH GmbH
III. List of tables
Table 1: Technical data .................................................................................16
Table 2: Laser spot size.................................................................................18
Table 3: Connector pin assignment ...............................................................20
Table 4: Explanation of hardware status items..............................................34
Table 5: Description of gain steps..................................................................37
Table 6: Binary output - Maximum measurement frequency (MFmax).............39
Table 7: Decimal output - Maximum measurement frequency (MFmax)..........40
Table 8: Measurement window - output behavior.........................................41
Table 9: Mean value outcome.......................................................................46
Table 10: Parameter SD - Output encoding ...................................................47
Table 11: Output behavior on error ..............................................................48
Table 12: Available termination chars ...........................................................51
Table 13: Error codes....................................................................................56

LDS70A Manual
ASTECH GmbH Page 7
Used Symbols
Sign warns against emitting visible and invisible laser radiation.
Sign warns against danger of electrical power and of electric shock.
Sign warns against danger.
Sign shows information for use in hazardous environments.
Sign indicates important information regarding device use of the
device.
The sign shows protection class 3 (protective extra-low voltage).
Sign indicates degree of protection (IP) of the device.
Sign informs that special guidelines had to be applied for device
disposal.

General Information LDS70A User Manual
Page 8 ASTECH GmbH
1General Information
The laser distance sensor LDS70A was developed for industrial applications. It
enables non-contact measurement of distances in a large working range and
with a high sampling rate up to 40 kHz to almost any diffusely reflecting
surface to 70 m and up to 320 m on reflectors. The sensor uses an eye-safe
laser radiation at a wavelength of 905 nm (infrared).
The IP67 housing of the LDS70A is impact and shock resistant and ideally
suited for use in harsh industrial environments.
The LDS70A has a selectable RS232 and RS422 interface, an analog output and
2 digital outputs.
The LDS70A is characterized by very compact and rugged design, easy
mounting, low power, adjustable switching outputs and the ability to set user-
specific parameters. This opens up a variety of uses in industrial applications.
▪Rapid process monitoring
▪Position monitoring
▪Level measurement
▪Monitoring of object movements
▪Positioning of cranes and loading equipment
▪Measurement of inaccessible points, for example in cavities, pipes and
containers
▪Particularly suitable for use in scanners
The LDS70 sensor operates on the basis of time of flight measurement. Short
laser pulses are transmitted. The light pulse reflected from the target is
detected by the receiver. The distance can be determined by the time shift.
The measurement range depends on the reflectivity and the surface type of
the measured target.

LDS70A User Manual Safety advice
ASTECH GmbH Page 9
2Safety advice
2.1 Basic safety advice
Please read the safety and operating advice carefully, and observe the advice
when operating the device.
Danger of Laser radiation
Do not open the LDS70A, otherwise Laser radiation can be emitted
that can cause eye injuries. Please observe all information and
guidelines for operating the Laser.
The LDS70A corresponds to Laser class 1 based on the standard
IEC 60825-1:2014. The radiation of class 1 Lasers does not imply
any danger to the human eye; any injury of the human eye can be
excluded.
Danger, electric shock
The LDS70A may only be opened for repair purposes by the
manufacturer. If the device is opened arbitrarily without
authorization, all warranty claims will expire.
The operating and storage conditions have to be observed (see
chapter 3). The inobservance of this advice and the adverse use of
the device can lead to injuries of the user or to damage of the
device.
Connectors may not be plugged or unplugged when voltage is
applied. All installation work may only be carried out when no
voltage is applied.
The device may only be operated as intended and in faultless
condition.
Safety installations must not be rendered ineffective.
Safety and warning signs must not be removed.
Protection Class 3, low voltage
The device LDS70A operates with low voltage of DC 10 to 30 volts.

Safety advice LDS70A User Manual
Page 10 ASTECH GmbH
Protection degree: In accordance with the Protection Degree IP 67,
the LDS70A is protected against jet water and dust, and against
short submersion into water.
When operating the device under extreme outdoor environmental
conditions, the use of additional weather protection is
recommended (e.g. a cover plate with a short distance to the
LDS70A). Rapid temperature changes can lead to humidity entering
the device.
The device is not shatter-proof. Do not let the device fall onto the
ground, and avoid any shock.
The device is delivered in a solid cardboard box, which is suited for
the transport of the device.
The device may not be used in explosive environments; otherwise
there is the danger of damage to the LDS70A and the surrounding
equipment, and of injuries of the user.
2.2 Advice for operating device
The LDS70A should not be put into operation when optical parts
are fogged or dirty. The optical components of the equipment
should not be touched with bare hands!
Dust and dirt are removed from the optical components with
extreme caution! Cleaning with solvents or mechanical means is
not allowed.
The device must be protected against overheating. The device will
not be switched off automatically when the operating
temperatures are exceeded. The persisting overheating of the
device will lead to a reduced lifetime of the laser diode.
The device must be protected from impact.
The device must be protected from extreme temperature
fluctuations. When extreme temperature fluctuations are occurring
use additional protection housing.