ASTECH LDM41E User manual

Manual
LDM41E and LDM42E
Version 1.6

LDM41E and LDM42E Manual
Page 2 ASTECH GmbH
Dear User,
You are advised to carefully read this User Manual before powering on the
LDM41E and LDM42E Laser distance measuring sensor for the first time.
This is necessary to ensure that you will be able to utilize all the capabilities
and features which your new acquisition provides.
This technology is subject to continuously ongoing development.
Editorial deadline: July 2018
Firmware version: ≥7.05 and 8.06
Manual version: V 1.6
FIle: Manual_LDM41-42E_EN_V1.6.docx
Note:
Proper care has been used in compiling this document. No liability will be
accepted in the event of damage resulting from failure to comply with the
information contained herein.
Revisions history
Manual Version
Date
Changes
1.6
27.07.2018
Max. Trigger voltage
1.5
29.06.2016
E19 added, MTBF
1.4
16.03.2015
New design
ASTECH GmbH, Schonenfahrerstr. 5, D-18057 Rostock
Internet: www.astech.de E-Mail: [e-mail]
Phone: +49 (0)381 / 44073-0 Fax: +49 (0)381 / 44073-20

LDM41E and LDM42E Manual Content
ASTECH GmbH Page 3
I. Content
1 General.......................................................................................................6
2 Safety Instructions ..................................................................................... 8
2.1 General Safety Instructions...............................................................8
2.2 Intended & Conforming Use ............................................................. 8
2.3 Nonconforming use...........................................................................8
2.4 Laser Classification ............................................................................9
2.5 Electric Supply ................................................................................. 10
2.6 Important Operating Advice ........................................................... 10
3 Technical Data..........................................................................................11
4 Mechanical Mounting Conditions............................................................13
5 Electrical Connection ............................................................................... 15
5.1 Rear-Side Cover Terminals ..............................................................15
5.2 Assignment of Terminals.................................................................16
5.3 Shield and Grounding......................................................................18
6 Limiting Values for Voltages ....................................................................19
7 Start up ....................................................................................................20
7.1 Start up with RS232.........................................................................20
7.2 Start up with Ethernet.....................................................................21
8 Commands and Parameter ......................................................................23
8.1 General............................................................................................23
8.2 DT –distance tracking ..................................................................... 25
8.3 DS –distance tracking (<7 m).......................................................... 25
8.4 DW –distance tracking with target board (10 Hz) ..........................25
8.5 DX –distance tracking with target board (50 Hz) ........................... 26
8.6 DF –distance measurement with external trigger..........................26
8.7 DM –distance measurement .......................................................... 27
8.8 TP –internal temperature [°C] ........................................................ 27
8.9 SA –display/set average value [1..20] ............................................27
8.10 SD –display/set display format [d/h/s}] .........................................27
8.11 ST –display/set measure time [0..25].............................................28
8.12 SF –display/set scale factor ............................................................ 29

Content LDM41E and LDM42E Manual
Page 4 ASTECH GmbH
8.13 SE –display/set error mode [0/1/2] ............................................... 30
8.14 AC –display set ALARM center ....................................................... 30
8.15 AH –display/set ALARM hysteresis ................................................ 31
8.16 AW –display/set ALARM width ...................................................... 31
8.17 HO –display/set Temperature for heating on ................................ 31
8.18 HF –display/set Temperature for heating off 17 ............................. 32
8.19 RMx y z –display/set remove measurement.................................. 32
8.20 TDx y –display/set trigger delay trigger level................................. 33
8.21 TMx y –display/set trigger mode trigger level ............................... 33
8.22 BR –display/set baud rate [2400..38400] ...................................... 35
8.23 AS –display/set autostart command.............................................. 35
8.24 OF –display/set distance offset...................................................... 35
8.25 SO –set current distance to offset ................................................. 35
8.26 LO –Laser on................................................................................... 36
8.27 LF –laser off.................................................................................... 36
8.28 PA –display settings ....................................................................... 36
8.29 PR –reset settings .......................................................................... 36
9 Interface Connection ............................................................................... 37
9.1 Ethernet .......................................................................................... 37
9.2 Serial Interface RS232 ..................................................................... 39
9.3 Output Format Ethernet and RS232 ............................................... 39
9.4 Digital Switching Output (Alarm) .................................................... 40
9.5 Trigger Input ................................................................................... 42
10 List of Commands .................................................................................... 43
11 Error Codes .............................................................................................. 45
12 EG Declaration of Conformity.................................................................. 46
13 Part Numbers........................................................................................... 47

LDM41E and LDM42E Manual Content
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II. List of Figures
Figure 1 : Measurement principle ......................................................................6
Figure 2 : Warning Sign Laser Radiation Class 2 .................................................9
Figure 3 : Dimensional drawing ........................................................................13
Figure 4 : Offset against zero-edge...................................................................14
Figure 5 : LDM41E and LDM42E terminals .......................................................15
Figure 6 : Isolated isntallation...........................................................................18
Figure 7 : Program LDMTool ............................................................................. 21
Figure 8 : Program EtherTool............................................................................ 22
Figure 11 : Trigger level = 1...............................................................................34
Figure 12 : Trigger level = 0...............................................................................35
Figure 13 : Telnet Program ...............................................................................37
Figure 14 : LDM41E Sensor Page ...................................................................... 38
Figure 15 : Digital output behavior, positive/negative hysteresis ....................41
III. List of tables
Table 1 : Technical data ....................................................................................11
Table 2 : LDM41E and LDM42E terminals......................................................... 15
Table 3 : Pin assignment power supply and trigger.......................................... 16
Table 4 : Pin assignment Fast Ethernet............................................................. 16
Table 5 : Pin assignment RS232 ........................................................................17
Table 6 : Pin assignment programming cable................................................... 18
Table 7 : Input voltages..................................................................................... 19
Table 8 : Output voltages..................................................................................19
Table 10 : Output format LDM41E and LDM42E ..............................................27
Table 11 : Examples of Scale factor ..................................................................30
Table 12 : Meaning of SE .................................................................................. 30
Table 13 : Command list LDM41E and LDM42E................................................ 43
Table 14 : Error codes ....................................................................................... 45
Table 15 : Part numbers.................................................................................... 47

General LDM41E and LDM42E Manual
Page 6 ASTECH GmbH
1General
The LDM41E and LDM42E is a Laser sensor to measure distances from 0.1 m to
more than 100 m with pinpoint accuracy.
A given target can be clearly identified with the help of a red Laser sighting
point. In terms of operating reach, the LDM41E and LDM42E performs
depending on the reflectance, morphology and qualities of the target to be
measured.
The sensor works based on comparative phase measurement. It emits
modulated Laser light which is diffusely reflected back from the target with a
certain shift in phase to be compared with a reference signal. From the
amount of phase shift, a required distance can then be determined with
millimeter accuracy.
Figure 1 : Measurement principle
A distance measuring cycle can be triggered in three different ways:
By sending a command from the PC or another equivalent control
unit
By making appropriate prior parameter settings for the auto start
command and applying supply voltage
By external triggering (in remote-trigger mode).
For a more detailed description of these three trigger options, you should
consult chapter 8, Commands and Parameter of this User Manual.

LDM41E and LDM42E Manual General
ASTECH GmbH Page 7
Special performance features are:
Provides high accuracy and great reach under extreme outdoor
temperatures.
Works in a wide range of operating voltages from 10 V= to 30 V= from an
on-board vehicle supply point, an industrial direct voltage supply net or a
DC power pack.
Features consistently low power consumption of <1.5 W
1
(without IAlarm)
Up to 30 m reach for distance measurement, with potential for more than
100 m reach if additional reflectors
2
are mounted onto the target
(depending on reflectance and environmental conditions).
Visible Laser beam for easier sighting.
Fast Ethernet port for input of measuring functions commands from, and
output of measured values to a PC or a PLC (Telnet connection)
Switching output with adjustable limit and hysteresis.
Measured values can be displayed in meters, decimeters, centimeters, feet
and inches due to.
Option for remote triggering of a measurement from an external trigger
device.
3
1
inactive internal heating for devices with internal heating (LDM41E-h and LDM42E-h)
2
e.g. 3M, self adhesive foil white non glossy or foil 3290 for longer distances
3
Trigger function is not available for devices with internal heating (LDM41E-h and LDM42E-h)

Safety Instructions LDM41E and LDM42E Manual
Page 8 ASTECH GmbH
2Safety Instructions
2.1 General Safety Instructions
These safety and operating instructions should be carefully read and followed
during practical work with the LDM41E and LDM42E.
There is danger of Laser radiation or electrical shock. For necessary
repair work, the LDM41E and LDM42Emay not be opened by anyone
other than Manufacturer personnel. Unauthorized intervention into
the inner product space will void any warranty claims.
Compliance with all specified operating conditions is necessary.
Failure to observe advisory notes or nonconforming product usage may cause
physical injury to the user or material damage to the LDM41E and LDM42E.
Cable connectors must not be plugged or unplugged under voltage.
Remember to turn voltage supply off before you begin working on cable
connections.
2.2 Intended & Conforming Use
Measurement of distances
Special measuring functions
Compliance with prescribed temperatures for operation/storage
Operation at correct voltage level
Application of specified signal levels to the appropriate data lines
2.3 Nonconforming use
Do not operate the LDM41E and LDM42E in any other way than
described under "Intended & Conforming Use" above and only in a
proper working condition
Safety devices must not be defeated or otherwise rendered
ineffective
Information and warning signs must not be removed
Repair work on the LDM41E and LDM42E must not be carried out
by anyone other than authorized personnel.

LDM41E and LDM42E Manual Safety Instructions
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Refrain from using the LDM41E and LDM42E without certified
protection in an explosive environment
Measurement with the LDM41E and LDM42E pointed at the sun or
other strong light sources may produce faulty results
Measurement of targets with poor surface reflectance in a strongly
reflecting environment may also result faulty measurements.
Measurement of strongly reflecting surfaces may deliver faulty
results.
Measurement performed through transparent optical media, for
example glass, optical filters, Plexiglas, etc. may equally produce
incorrect results.
Measurement on translucent objects (materials allow light to pass
through, but are not transparency, e.g. polystyrene, wax, different
plastics etc.) can give a too large measured value, since also light is
reflected by deeper layers
Rapidly changing measuring conditions are likely to falsify the result
of measurement
2.4 Laser Classification
The LDM41E and LDM42E are Class 2 laser product, ≤1 mW as stipulated in
EN60825-1:2007, Class 2.
Caution:
There is Class 2 Laser radiation. Do not stare into beam!
Figure 2 : Warning Sign Laser Radiation Class 2
The Laser power is limited to maximum 1 mW. The Laser radiation is visible. A
short-term exposure (duration up to 0.25 s) is harmless to the eye.
Users are instructed by Laser warning sign (see Figure 2) to do not stare into
the beam. They have to protect themselves by turn the head and/or closing
the eyes and by avoid a long look into the beam.

Safety Instructions LDM41E and LDM42E Manual
Page 10 ASTECH GmbH
Do not direct the Laser beam onto persons.
The sensor can use without any additional safety protection.
2.5 Electric Supply
Use only 10 V to 30 V DC (direct voltage) for LDM41E and LDM42E operation.
Use only the specially designated connector terminal for voltage supply.
Specified signal levels must not be exceeded, in order to guarantee correct
data communication.
2.6 Important Operating Advice
To make full use of the system’s inherent performance capabilities and
achieve a long service life, you should always follow these operating rules:
Do not turn the module on if there is fogging or soiling on its optical
parts
Do not touch any of the module's parts with bare hands.
Proceed with care when removing dust or contamination from
optical surfaces!
Prevent shock impacts during transport and use of the LDM41E and
LDM42E
Prevent overheating of the LDM41E and LDM42E.
Prevent major temperature variances during LDM41E and LDM42E
operation
In accordance with IP65 internal protection standards, the LDM41E
an LDM42E is designed to be splash proof and dustproof.
Read these safety and operating instructions with due care and
follow them in practical use.