Siemens SIWAREX WL290 DB-S CA User manual

SIWAREX WL290
Silo mounting unit
DB-S CA 2.3 ... 113 t
Operating Instructions
7MH5722-4UA10
7MH5722-5LA10
7MH5722-5NA10
7MH5722-5RA10
7MH5722-6AA10
10/2019
A5E46619167-AA
Introduction 1
Safety instructions 2
Description 3
Application planning 4
Installation 5
Service and maintenance 6
Technical data 7
Dimension drawing 8
Product documentation and
support A

Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified
personnel are those who, based on their training and experience, are capable of identifying risks and avoiding
potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this
publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E46619167
Ⓟ 11/2019 Subject to change
Copyright © Siemens AG 2019.
All rights reserved

Table of contents
1 Introduction...................................................................................................................................................5
1.1 Purpose of this documentation.................................................................................................5
1.2 History ......................................................................................................................................5
1.3 Scope of delivery......................................................................................................................5
1.4 Checking the consignment.......................................................................................................6
1.5 Security information .................................................................................................................6
1.6 Transportation and storage ......................................................................................................7
1.7 Notes on warranty ....................................................................................................................7
2 Safety instructions ........................................................................................................................................9
2.1 Prerequisites for safe use ........................................................................................................9
2.1.1 Laws and directives..................................................................................................................9
2.1.2 Conformity with European directives........................................................................................9
2.2 Improper device modifications .................................................................................................9
2.3 Requirements for special applications ...................................................................................10
3 Description..................................................................................................................................................11
3.1 Application..............................................................................................................................11
3.1.1 Silo mounting unit...................................................................................................................11
3.1.2 Lifting protection.....................................................................................................................11
3.1.3 Overload protection................................................................................................................11
3.1.4 Grounding cable.....................................................................................................................11
3.2 Structure.................................................................................................................................12
4 Application planning ...................................................................................................................................13
4.1 Load cell dummies .................................................................................................................13
4.2 Lifting protection.....................................................................................................................13
4.3 Load pick-up...........................................................................................................................14
4.4 Overload protection................................................................................................................15
5 Installation ..................................................................................................................................................17
5.1 Safety information/instructions ...............................................................................................17
5.2 Dismantling ............................................................................................................................19
6 Service and maintenance ...........................................................................................................................21
6.1 Servicing and maintenance....................................................................................................21
6.2 Disposal .................................................................................................................................22
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7 Technical data ............................................................................................................................................23
8 Dimension drawing .....................................................................................................................................25
A Product documentation and support...........................................................................................................29
A.1 Product documentation ..........................................................................................................29
A.2 Technical support...................................................................................................................29
Index...........................................................................................................................................................31
Table of contents
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Introduction 1
1.1 Purpose of this documentation
These instructions contain all information required to commission and use the device. Read the
instructions carefully prior to installation and commissioning. In order to use the device
correctly, first review its principle of operation.
The instructions are aimed at persons mechanically installing the device, connecting it
electronically, configuring the parameters and commissioning it, as well as service and
maintenance engineers.
1.2 History
The following versions of this documentation have been released to date. The changes apply
to the previous version:
Edition Comment / change
10/2019 Initial release
1.3 Scope of delivery

①Grounding cable
②Pin
③Pre-assembled silo mounting unit
Figure 1-1 Pre-assembled silo mounting unit
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1.4 Checking the consignment
1. Check the packaging and the delivered items for visible damage.
2. Report any claims for damages immediately to the shipping company.
3. Retain damaged parts for clarification.
4. Check the scope of delivery by comparing your order to the shipping documents for
correctness and completeness.
WARNING
Using a damaged or incomplete device
Danger of explosion in hazardous areas.
● Do not use damaged or incomplete devices.
1.5 Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the internet if and to the extent such a connection is necessary and
only when appropriate security measures (e.g. firewalls and/or network segmentation) are in
place.
For additional information on industrial security measures that may be implemented, please
visit
https://www.siemens.com/industrialsecurity.
Siemens’ products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customer’s exposure to cyber
threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
https://www.siemens.com/industrialsecurity.
Introduction
1.5 Security information
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1.6 Transportation and storage
To guarantee sufficient protection during transport and storage, observe the following:
● Keep the original packaging for subsequent transportation.
● Devices/replacement parts should be returned in their original packaging.
● If the original packaging is no longer available, ensure that all shipments are properly
packaged to provide sufficient protection during transport. Siemens cannot assume liability
for any costs associated with transportation damages.
CAUTION
Insufficient protection during storage
The packaging only provides limited protection against moisture and infiltration.
● Provide additional packaging as necessary.
Special conditions for storage and transportation of the device are listed in Technical data
(Page 23).
1.7 Notes on warranty
The contents of this manual shall not become part of or modify any prior or existing agreement,
commitment or legal relationship. The sales contract contains all obligations on the part of
Siemens as well as the complete and solely applicable warranty conditions. Any statements
regarding device versions described in the manual do not create new warranties or modify the
existing warranty.
The content reflects the technical status at the time of publishing. Siemens reserves the right
to make technical changes in the course of further development.
Introduction
1.7 Notes on warranty
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Introduction
1.7 Notes on warranty
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Safety instructions 2
2.1 Prerequisites for safe use
2.1.1 Laws and directives
Observe the test certification, provisions and laws applicable in your country during connection,
assembly and operation. These include, for example:
● National Electrical Code (NEC - NFPA 70) (USA)
● Canadian Electrical Code (CEC) (Canada)
Further provisions for hazardous area applications are for example:
● IEC 60079-14 (international)
● EN 60079-14 (EC)
2.1.2 Conformity with European directives
The CE mark on the device is a sign of conformity with the following European directives:
Electromagnetic compatibil‐
ity EMC
2014/30/EU
Directive of the European Parliament and of the Council on the
approximation of the laws of the Member States relating to elec‐
tromagnetic compatibility and repealing Directive 89/336/EEC.
The standards applied can be found in the EC declaration of conformity for the device.
2.2 Improper device modifications
WARNING
Improper device modifications
Danger to personnel, system and environment can result from modifications to the device,
particularly in hazardous areas.
● Only carry out modifications that are described in the instructions for the device. Failure to
observe this requirement cancels the manufacturer's warranty and the product approvals.
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2.3 Requirements for special applications
Due to the large number of possible applications, each detail of the described device versions
for each possible scenario during commissioning, operation, maintenance or operation in
systems cannot be considered in the instructions. If you need additional information not
covered by these instructions, contact your local Siemens office or company representative.
Note
Operation under special ambient conditions
We highly recommend that you contact your Siemens representative or our application
department before you operate the device under special ambient conditions as can be
encountered in nuclear power plants or when the device is used for research and development
purposes.
Safety instructions
2.3 Requirements for special applications
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Description 3
3.1 Application
3.1.1 Silo mounting unit
The self-centering mounting unit for SIWAREX WL290 DB-S CA load cells is particularly
suitable for implementation in container, platform, vehicle and roller table scales. The design
was specially developed for installation in silos. The mounting unit handles the introduction of
force into the load cell. The mounting unit covers load cell rated loads from 2.3 t to 113 t.
3.1.2 Lifting protection
The lifting protection prevents the load bearing implement from being lifted off of the load cells.
If there is a risk of the load bearing implement being lifted or toppled, then lifting protection is
required. Lifting protection is required in the case of lightweight containers and tall, outdoor
silos.
3.1.3 Overload protection
The overload protection protects load cells from a load that is too great.
There is overload protection against excessive loads in the measuring direction and overload
protection against excessive transverse forces.
Transverse forces are caused by, for example, wind, filling processes, acceleration, or
conveyor belt friction. Protect the load cell from loads as stated in section Technical data
(Page 23).
3.1.4 Grounding cable
The grounding cable is used to protect the load cells from undesired currents. The causes of
such currents are, for example:
● Equalizing currents with missing or faulty equipotential bonding conductors
● A lightning strike nearby
● Welding work
● Static charge
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3.2 Structure
The silo mounting unit consists of the following main components:
● Base plate ⑤
● Top plate ⑨
● Two dummy blocks ④ as installation aids
Together with the load cell, the silo mounting unit represents a self-centering bearing unit.

①Pin ⑥Load cell support
②Bolts ⑦Fixing screw for load cell
③Grounding cable ⑧Washer
④Dummy block ⑨Top plate
⑤Base plate
Figure 3-1 Exploded view: Silo mounting unit without installed load cell
Description
3.2 Structure
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Application planning 4
4.1 Load cell dummies
Principle of operation
Load cells are sensitive sensors. To protect the load cells from becoming damaged during
installation and transport, install the load cells only at the last minute. Replace the load cells
during installation and transport with placeholders, so-called dummies or phantoms.
Dummies might be designed as follows:
● A copy of the compact mounting unit by means of a welded construction for coarse
installation work
● Use of a SIWAREX compact mounting unit for light installation work
A copy of the compact mounting unit by means of a welded construction for coarse installation
work
A piece of pipe or some other steel profile is welded between two plates with the hole pattern
for the fixing screws. The total height corresponds to the installation height of the compact
mounting unit. This is the most stable and secure version. Rough installation work can be
carried out with the welded construction.
Use of a SIWAREX compact mounting unit for light installation work
The compact installation units are delivered pre-assembled. Compact installation units are set
to the installation height of the operational unit. With compact mounting units, light installation
work can be carried out.
4.2 Lifting protection
Lifting protection is integrated in the compact installation units for the load cells of the
SIWAREX series. When other compact mounting units are used, lifting protection must be
provided for in the design.
The following figure shows a proposed solution for lifting protection. The X designates the
possible lifting path of the load bearing implement. The bore ØD must be larger than the
diameter of the bolt Ød. The movement of the load bearing implement must not be hindered.
'G
;
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Figure 4-1 Proposed solution for lifting protection
4.3 Load pick-up
Mounting surfaces
The following requirements apply to the installation areas:
● The positional and angular deviations of the mounting areas to each other correspond to the
general tolerances for welded constructions in EN ISO 13920.
● Ensure that the foundations are absolutely firm and free of depressions. Mount the
installation elements in concrete foundations on evenly cast steel plates.
● The mounting surfaces must be vertical to the measuring direction and preferably in one
plane.
● A plane of ≤ 0.2 mm is required for the mounting surfaces.
More than three support points
For more than three support points, the load bearing implement is usually statically
indeterminate. With firm foundations and load bearing implements, the load is not evenly
distributed to all load cells. The same applies to unstable mounts such as a steel construction.
Two diagonal load cells bear the main load. The other load cells only support the load bearing
implement.
There are two ways to take this into consideration:
● Over-dimensioning of the load cells
● Height compensation of the support points
Over-dimensioning of the load cells
The rated load of the load cells is calculated such that with, for example, four support points the
entire weight can be borne by two load cells.
This also prevents an overload of the load cells if depressions in the foundation have to be
taken into consideration, e.g. for racks in the steel structure.
Height compensation of the support points
With this method, the output signals of all of the load cells are attuned to each other under a
load. To ensure that all of the load cells receive approximately the same load, use
compensation plates to compensate the heights. The compensation plates are positioned
between the bracket and top plate of the compact mounting unit.
The output signals of the individual load cells correspond to the load distribution.
Application planning
4.3 Load pick-up
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4.4 Overload protection
NOTICE
Irreparable faults and damage to the load cells
If load cells are used beyond the maximum working load or the maximum transverse load, this
can cause irreparable faults and even fracturing of the load cell or the compact mounting unit.
● When using load cells with small rated loads, always provide overload protection in order
to protect the load cells from becoming damaged. You need overload protection for both
the measuring direction and the transverse direction.
Overload protection in the measuring direction
You protect load cells against vertical overload by placing a stop screw under the point where
force is introduced. The stop screw limits the measuring path of the load cell.
For load cells with high rated loads, the risk of an unintentional overload is not as great. Take
into consideration possible additional loads when dimensioning the load cells.
Another method for protecting load cells from an overload is to over-dimension the load cells.
Overload protection in the transverse direction
For the load cells with a load foot, the weight force is introduced into the load cells via bearing
surfaces. Up to a certain degree, these bearing surfaces allow lateral movement of the load
bearing implement or a change in its length as a result of expansion due to heat. They generate
a restoring force corresponding to the deflection, which re-centers the load bearing implement.
This freedom of movement is desired and necessary for accurate weighing.
If the transverse force is so great that it exceeds the restoring force of the bearing unit and thus
the deflection limit, appropriate protective measures are required. Pendulum limiters or guide
elements are suitable for this, for example.
Set the pendulum limiters in such a way that the maximum deflection is not exceeded in any
direction. The figure below shows the overload protection in the transverse direction using two
examples.
6WRS+ROH%ROW3ODWIRUP3ODWIRUPs
s
s
s

Figure 4-2 Pendulum limitation with a maximum deflection of 4 mm as exemplified by two weighing
platforms
Application planning
4.4 Overload protection
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Application planning
4.4 Overload protection
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Installation 5
5.1 Safety information/instructions
WARNING
Falling loads
Risk to life! Load cells are not machine components which have been constructed with the
normal safety factors.
● Install fall protection or disaster protection according to the potential risk.
● Lift the load bearing implement using suitable hoisting equipment.
NOTICE
Improper handling of the load cell
The load cell can be damaged when being handled improperly. Load cells are precision
components.
● Observe the operating instructions for the load cell. SIWAREX WL200 Operating
instructions (https://support.industry.siemens.com/cs/ww/en/view/109749190)
● Do not drop the load cell.
● Protect the load cells from shocks.
● Do not carry the load cell by its connecting cables.
● Do not damage any cables of the connecting cables.
● Do not damage any cables of the load cell.
● As long as the installation work on the scale structure is not completed, replace the load
cells with dummies. Load cell dummies (Page 13)
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NOTICE
Incorrect assembly of the load cell
Damaging of load cells, installation parts or load bearing implement
With load cells of smaller rated loads, there is a risk of stretching the load cell bodies when
attaching force transfer devices, e.g. when tightening locknuts.
Torsional and bending moments, eccentric loads and transverse loads are disturbance
variables. These disturbance variables cause errors in the measuring result and can damage
the load cells and compact mounting units if the maximum limits are exceeded.
● To ensure safe use of the hoisting gear, provide indented claws or crane eyebolts on the
load bearing implement.
● Do not overload the load cells.
● Put the load bearing implement down slowly.
● Use overload protection that securely absorbs the desired loads. The overload protection
permits a rise in weight unhindered until the setpoint weight is reached.
● Introduce the load in the measuring direction of the load cell.
● The mounting components normally allow so much room for movement that heat
expansion will not result in lateral loading.
NOTICE
Incorrect welding
Incorrect welding can damage the load cell.
● Do not conduct the welding current over the load cells.
– Attach the grounding clamp of the welding unit making reliable contact close to the weld.
– Bridge the load cells with a highly flexible grounding cable. See the section Dimension
drawing (Page 25).
– Disconnect the individual load cells.
NOTICE
Missing grounding of the load cell
Undesirable electrical currents can arise during lightning and damage the load cell.
● Bridge the load cells with highly flexible grounding cables. See the section Dimension
drawing (Page 25).
Installation
5.1 Safety information/instructions
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NOTICE
Improper installation of the load cell in the compact mounting unit
An improper installation of the load cell in the compact mounting unit can destroy the load cell
and the compact mounting unit.
● Check that the load cell and compact mounting unit are installed correctly, for example, by
checking the mounting dimensions and oscillation distances. See the section Technical
data (Page 23).
● To prevent water from penetrating, lay cables through cable glands in the form of a vertical
downwards loop.
5.2 Dismantling
For dismantling the load cells, the same safety rules apply as for installation.
1. Disconnect all the supply voltages and auxiliary voltages.
2. Secure the load carrier against falling.
3. Use appropriate hoisting gear and tools.
4. Take the load off the load cell.
5. Carefully remove the load cell without using force. Do not pull on the cable of the load cell.
6. If you intend to reinstall the load cell or send it for repair, do not cut the load cell cable.
7. Do not carry the load cell by the cable.
Installation
5.2 Dismantling
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Installation
5.2 Dismantling
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