LORENZ MESSTECHNIK GM42-MAX User manual

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
1/11
Ampliers
Operating Instructions
DIN Mounting Rail Min.-/Max. Value Memory Unit GM42-MAX

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
2/11
Table of Content
1 Imprint / Copyright 3
2 Important Notes / Keeping 3
2.1 General Informations 3
2.2 Intended Use 5
2.3 General Hazards in the Event of non-compliance with the Safety Instructions 5
2.4 Residual Hazards 5
3 Safety and Warning Notices 5
3.1 Symbols 5
3.2 Health Protection and Safety 6
3.3 Conversions and Changes 6
3.4 CE Marking 6
4 Preamble 6
4.1 Product Description 6
4.2 Power Supply 7
4.3 Safe and Correct Use 7
4.4 Dimensions / Weight 7
5 Instruction / Description of the Operating Mode 8
5.1 Connect Description 8
5.2 Switching the Device on 8
5.3 Minimum-/Maximum Value Memory 8
5.4 Interfaces and Connections 9
5.5 Troubleshooting 9
6 Product Phases 9
6.1 Transportation 9
6.2 Commissioning and Installation 9
6.3 Standard Operation 10
6.4 Maintenance and Cleaning 10
6.5 Equipment disposal 11
7 Reference Information 11

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
3/11
1 Imprint / Copyright
© 2019 Lorenz Messtechnik GmbH, D-73553 Alfdorf
These operating instructions do not constitute an agreed quality agreement or durability guarantee
within the meaning of § 443 BGB (German Civil Code).
Technical changes, errors and misprints excepted.
No part of this publication may be reprinted without the written permission of Lorenz Messtechnik
GmbH, Alfdorf.
2 Important Notes / Keeping
Before installing and commissioning the device, these operating instructions, and in particular the
corresponding safety instructions, must be read. The device may only be used as described in this
manual to prevent injury or damage.
The operating instructions have been drawn up in accordance with EN 82079-1 and must be kept in
a safe place.
2.1 General Informations
 Theseoperatinginstructionsareintendedfortechnicallyqualiedpersonnelwhohaveappropriate
 knowledgeintheeldofmeasurementandcontroltechnology.Qualiedpersonnelarepersonswho
are familiar with the installation, operation, maintenance and repair of the device and have the appro-
 priatequalications.Thepersonnelmusthaveknowledgeofthelegalandsafetyregulationsandbe
able to apply them.
 Thedevicemayonlybeusedbyqualiedpersonnelinaccordancewiththetechnicaldatainconnec-
tion with the safety regulations and rules set out below. During operation, the legal and safety regula-
tions required for the respective application must also be observed. This also applies analogously to
the use of accessories.
The exact information about all safety instructions and warnings contained in these operating in-
structions as well as their correct technical implementation are prerequisites for the safe installation,
commissioning, safe operation and maintenance of Lorenz Messtechnik GmbH devices. All measures
 mustonlybecarriedoutbyqualiedpersonnel.Allpersonsinvolvedintheprojectplanning,instal-
lation and operation of Lorenz Messtechnik GmbH devices must be familiar with the safety concepts
 intheautomationtechnologyandbequaliedintheabove-mentionedsense.
For reasons of clarity, these operating instructions cannot cover all details and information and not all
applications for the handling of devices from Lorenz Messtechnik GmbH. Nor can all conceivable
types of installation, operation and maintenance must be taken into account.

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
4/11
If further information is desired or required, or if special problems occur which are not described in
detail in these operating instructions, please contact Lorenz Messtechnik GmbH.
The devices of Lorenz Messtechnik GmbH may only be operated in accordance with the applications
described in these operating instructions. Built-in devices may only be operated if they are properly
installed.
By connecting and commissioning the device, the purchaser accepts the General Terms and Con-
ditions of Sale and Delivery of Lorenz Messtechnik GmbH. Furthermore, the buyer accepts the possi-
ble incompleteness of this operating manual and that the information contained therein may not be
complete and informations are without guarantee. Errors, misprints and changes excepted.
Intended Use, not intended Use
A device from Lorenz Messtechnik GmbH is used for display, processing and control of processes. It
must not be used as the sole means of averting dangerous conditions on machines and systems.
Machines and systems must be designed in such a way that faulty states cannot lead to a dangerous
situation for the operating personnel (e. g. through independent limit value-switches or mechanical
interlocks). In particular, it must be ensured that a the device, its malfunction or its failure does not
lead to damage to property or a loss of that can lead to danger to people. It is also important to prevent
the precautions that are taken from being cannot be circumvented for the safety of a plant. Emergen-
cy stop devices must remain effective at all times.
Installation Instructions
Devices from Lorenz Messtechnik GmbH must be installed and connected in compliance with the
relevant DIN and VDE standards. They must be installed in such a way that unintentional operation
 issufcientlyexcluded.Topreventaninterruptionofthesupplyandsignallinesfromleadingtoan
 undenedor dangerousstate, appropriatehardware andsoftware safetyprecautions mustbe ob-
served.Supply and signallines mustbeinstalled insuch a waythat theydonot interferewith the functionof
the Lorenz Messtechnik GmbH by interfering signals (such as inductive or capacitive interferences).
Notes on Malfunctions, Maintenance and Repair
The devices do not contain any parts that require or can be serviced by the user. Repairs may only
be carried out by Lorenz Messtechnik GmbH. If it can be assumed that safe operation of the device is
no longer possible, it must be put out of operation immediately and secured against unintentional
operation. This applies in particular if:
• The device is visibly damaged
• The device is no longer functional
• Parts of the appliance are loose
• The connecting lines are visibly damaged
In addition, we would like to point out that all obligations of Lorenz Messtechnik GmbH arise exclusi-
vely from the respective purchase contract in which the warranty is conclusively stated.

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
5/11
2.2 Intended Use
Devices from Lorenz Messtechnik GmbH are to be used exclusively for measuring tasks and the di-
rectly associated control tasks. Any use beyond thisis considered to be improper.
The valid legal and safety regulations must be observed during measurement. The instrument is not
a safety component in the sense of its intended use and it is transported and stored properly. The
installation and commissioning, the operation and the disassembly must be carried out professionally.
2.3 General Hazards in the Event of non-compliance with the Safety
Instructions
The device complies with the current safety requirements. Residual dangers can emanate from the
device if it is improperly used and operated by untrained personnel. Any person entrusted with the
installation, operation, maintenance and repair of the device must read and understand the operating
instructions and, in particular, the safety instructions.
Incorrect use (e. g. by untrained personnel) may result in residual hazards. The operating instructions
must be read and understood by all persons involved in the installation, commissioning, maintenance,
repair, operation and dismantling of the device is trusted. The device must not be used if visible da-
mage is visible.
2.4 Residual Hazards
The system planner, equipment supplier and operator must plan, implement and be responsible for
the safety of the equipment. Other hazards must be minimized. The residual dangers of the measure-
ment technology must be pointed out and human error must be taken into account. The design of the
system must be suitable for avoiding hazards - a hazard analysis must be carried out for the system.
The applicable regulations and laws are as follows to note.
3 Safety and Warning Notices
3.1 Symbols
Warning: There is a risk of injury to persons. Damage to the machine is possible. The
accident prevention regulations of the employer‘s liability insurance association must
be observed.
Note: Important points to be observed. A note that indicates a possible danger of da-
mage to the product, process, person or the environment.
Additional information or reference to other important detailed information.

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
6/11
3.2 Health Protection and Safety
To ensure that our products are safe and do not pose a health hazard, the following points must be
observed:
1. Read all relevant sections of this manual carefully before starting work.
2. All warning signs on containers and packaging must be observed.
3. Installation, operation, maintenance and repair work may only be carried out by suitably trai-
ned personnel and in accordance with the instructions given. If one of these instructions is not
followed, the user of the product bears full responsibility for any consequences that may occur.
4. Disconnect the appliance from any power supply before opening it.
5. The safety instructions must be strictly observed in order to avoid damage to property and
bodily injury - possibly even fatal ones.
3.3 Conversions and Changes
 ThedevicemaynotbemodiedintermsofdesignorsafetywithouttheexpressconsentofLorenz
 MesstechnikGmbH.Anymodicationexcludesanyliabilityonourpartfordamagesresultingthere-
 from.Repairsandmodicationsareprohibited.
3.4 CE Marking
With the CE marking, Lorenz Messtechnik GmbH guarantees that its product meets the requirements
of the relevant EC directives.
4 Preamble
4.1 Product Description
The GM42-MAX is a universally applicable fast min./max. value memory with a ±10V input. The
slim housing shape allows space-saving installation in control cabinets on standard DIN mounting rails.
The analog outputs minimum and maximum value memory of ±10V enable direct signal processing with a
PLC. The minimum and maximum value memory can be cleared by a reset input. All indicators are
protected behind a transparent acrylic glass panel.

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
7/11
4.2 Power Supply
Mains operation
Power supply: 10 ... 30VDC, 100 mA, safe from reverse polarity
Ripple: < 10 %
Under-/overshoot: Can lead to erroneous measurements or defects
Voltage peaks: Are being discharged by fast protection components
Voltage dropouts: Voltage dropouts up to 10 ms have no effect
The supply voltage of 10 ... 30VDC is electrically isolated from the measuring and output circuit.
4.3 Safe and Correct Use
• Protect the device against moisture, condensation, rain, snow, etc.
• Protect the device against direct solar radiation
• Protect the device against dust and pollution
• Protect the device against excessive ambient temperature
• Protect the device against excessive vibration
4.4 Dimensions / Weight
Device dimensions: L x W x H: 23 x 111 x 76 mm
Weight: 0.10 kg

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
8/11
5 Instruction / Description of the Operating Mode
5.1 Connect Description
Terminal assignment
1 Signal 0 ±10V Input
2 GND Input
3 NC -
4 10 ... 30VDC Supply
5 GND Supply
6 Shield Supply
7 Clear min. value Input
8 GND Input
9 Clear max. value Input
10 Min. value Output
11 GND Output
12 Max. value Output
Status display (LED)
Power: On during operation
Delete MAX: On during deletion
Delete MIN: On during deletion
5.2 Switching the Device on
The device is activated and ready to operate as soon as supply voltage is applied. The readiness for
operation is signaled by the Power-LED.
5.3 Minimum-/Maximum Value Memory
A signal is measured at terminals 1 and 2. If the following measurement is smaller, the signal output at
the minimum value memory is updated at terminals 10 and 11. If the measurement is higher, the
respective value of the previous measurement is held and issued. The minimum value output is from
-10V to +10V.
A signal is measured at terminals 1 and 2. If the following measurement is larger, the signal output at
the maximum value memory is updated at terminals 12 and 11. If the measurement is smaller, the
respective value of the previous measurement is held and issued. The maximum value output is from
-10V to +10V.
A control signal of 10 ... 30VDC is required in order to reset the minimum and maximum values. In
order to delete the minimum value, the control signal must be applied to terminals 7 and 8. In order to
delete the maximum value, the control signal must be applied to terminals 9 and 8.
Power
GM 42
MAX
MIN
1 2 3
456
12 11 10
987
Bottom clamps
Top clamps
Bottom clamps
Top clamps
delete
delete

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
9/11
5.4 Interfaces and Connections
Voltage input Signal: ±10V
Control signal: 10 ... 30VDC
Voltage output Signal: ±10V
Note: The device must be disconnected from mains during all connection work. The safety
precautions must be observed.
5.5 Troubleshooting
Output signal not available
• No supply voltage - Power-LED must be on
• Control signal for resetting of min. or max. value is constantly activated
Voltage output in control limit
• The signal voltages are higher than ±10V
Resetting of min. or max. value is not possible
• The control signal is too small
Voltage output indicates undened values
• The signal voltage is not applied
6 Product Phases
6.1 Transportation
Please pack the equipment suitable for transportation.
The equipment must not move back and forth in the packaging.
Please protect the equipment against moisture.
6.2 Commissioning and Installation
Safety measures before the installation
Caution: The device may not be connected to the power supply system, directly. The speci-
cationsofthesupplyvoltageinchapter4.2mustbeconsidered.
Cable connections: Never connect voltage levels to unoccupied pins.

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
10/11
6.3 Standard Operation
EMC
Caution: The device may not be exposed to higher EMC transients than determined by the
standard.
Cable
Caution: Never disconnect the connectors by pulling the cables. Always separate the con-
nector at the plug, directly.
Storage
Store the device in dry and dust-free spaces only.
6.4 Maintenance and Cleaning
Warning: Please disconnect the device from the power supply before cleaning!
Clean the housing with a soft and slightly moisturized cloth. Never use solvents, as they may damage
the front panel labeling and the display panel.
While cleaning, ensure that no liquids enter the device or the connections.
Preventive maintenance and inspection
Check the plug connections
Repair
Note: The device does not contain any parts which must or can be serviced by the user.
Repairs may be carried out by Lorenz Messtechnik GmbH exclusively. If assuming that safe
operation of the device is no longer possible, it must be taken out of service and secured
against inadvertent operation, immediately. This applies in particular, if:
• The device shows visible damage
• The device is no longer functional
• Parts of the device are loose
• The connection lines show visible damage

Lorenz Messtechnik GmbH Obere Schlossstrasse 127/129/131
73553 Alfdorf Phone [phone], Fax [phone]
[email protected], www.lorenz-messtechnik.de
Technical changes, errors and misprints excepted. 090215d_GM42
11/11
6.5 Equipment disposal
The device must be disposed of in accordance with the applicable legal regulations - see also our
„General Terms and Conditions of Delivery and Sale“ at www.lorenz-messtechnik.de.
7 Reference Information
Data sheet of the DIN Mounting Rail Min.-/Max. Value Memory Unit GM42-MAX.