HBM PW29P Series User manual
Mounting Instructions | Montageanleitung |
Notice de montage
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PW29P
Hottinger Baldwin Messtechnik GmbH
Im Tiefen See 45
D-64293 Darmstadt
Tel. +49 6151 803-0
Fax +49 6151 803-9100
www.hbm.com
Mat.: 7-0101.0008
DVS: A03578_02_Y00_00 HBM: public
09.2018
EHottinger Baldwin Messtechnik GmbH.
Subject to modifications.
All product descriptions are for general information only.
They are not to be understood as a guarantee of quality or
durability.
Änderungen vorbehalten.
Alle Angaben beschreiben unsere Produkte in allgemeiner
Form. Sie stellen keine Beschaffenheits- oder Haltbarkeits
garantie dar.
Sous réserve de modifications.
Les caractéristiques indiquées ne décrivent nos produits
que sous une forme générale. Elles n'impliquent aucune
garantie de qualité ou de durabilité.
Mounting Instructions | Montageanleitung |
Notice de montage
English Deutsch Français
PW29P
2A03578_02_Y00_00 HBM: public PW29P
English
1 Safety instructions 3........................................
2 Markings used 7............................................
2.1 The markings used in this document 7..........................
2.2 Symbols on the product 8.....................................
3 Conditions on site 9........................................
3.1 Protection against corrosion 9.................................
3.2 Deposits 9..................................................
4 Mechanical installation 10....................................
4.1 Important precautions during installation 10......................
4.2 Mounting 10..................................................
5 Electrical connection 13......................................
5.1 Connection in a six‐wire configuration 13.........................
5.2 Connection in a four‐wire configuration 14........................
5.3 Shortening the cable 14.......................................
5.4 Extension cable 14............................................
5.5 EMC protection 15............................................
6 Specifications 16............................................
7 Dimensions 17..............................................
8 Accessories 18..............................................
Safety instructions
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1 Safety instructions
Appropriate use
Load cells of the PW29P…type series are designed for technical weighing
applications within the load limits stipulated in the specifications. Any other use
is not appropriate.
Load cells may only be installed by qualified personnel in compliance with the
specifications and with the safety requirements and regulations of these
mounting instructions. It is also essential to observe the applicable legal and
safety regulations for the application concerned. The same applies to the use
of accessories.
Load cells are not intended for use as safety components. Please also follow
the instructions in the “Additional safety precautions" section. Proper and safe
operation of the load cells requires proper transportation, correct storage, siting
and mounting, and careful operation.
Load carrying capacity limits
The data in the technical data sheets must be complied with when using the
load cells. In particular, the respective maximum loads specified must never be
exceeded. The values stated in the technical data sheetsmust not be
exceeded, for example, for
SLimit load
SLimit load at max. eccentricity
SLimit lateral loading
SBreaking loads
STemperature limits
SLimits of electrical loading capacity
Note, that when several load cells are installed in a scale, there is not always
an even distribution of load on the individual load cells.
Safety instructions
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Use as a machine element
The load cells can be used as machine elements. When used in this manner, it
must be noted that, to favor greater sensitivity, the load cell is not designed
with the safety factors usual in mechanical engineering. Please refer here to
the section “Load carrying capacity limits" and to the specifications.
Accident prevention
The prevailing accident prevention regulations must be taken into account,
even though the maximum capacity values in the destructive range are well in
excess of the full scale value.
Additional safety precautions
Load cells cannot (as passive transducers) implement any (safety‐relevant)
cutoffs. This requires additional components and constructive measures for
which the installer and operator of the plant is responsible.
In cases where a breakage or malfunction of the load cells would cause injury
to persons or damage to equipment, the user must take appropriate additional
safety measures that meet at least the requirements of applicable safety and
accident prevention regulations (e.g. automatic emergency shutdown, overload
protection, catch straps or chains, or other fall protection).
The electronics conditioning the measurement signal should be designed so
that measurement signal failure does not cause damage.
General dangers of failing to follow the safety instructions
Load cells are state‐of‐the‐art and reliable. There may be risks involved if the
transducers are mounted, sited, installed and operated inappropriately, or by
untrained personnel. Everyone involved with siting, starting up, operating or
repairing a load cell must have read and understood the mounting instructions
and in particular the technical safety instructions. The load cells can be
damaged or destroyed by non‐designated use of the load cells or by
non‐compliance with the mounting and operating instructions, these safety
instructions or any other applicable safety regulations (BG safety and accident
prevention regulations) when using the load cells. Load cells can break,
particularly in the case of overloading. The breakage of a load cell can also
cause damage to property or injury to persons in the vicinity of the load cell.
Safety instructions
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If load cells are not used according to their designated use, or if the safety
instructions or specifications in the mounting and operating instructions are
ignored, it is also possible that the load cells may fail or malfunction, with the
result that persons or property may be affected (due to the loads acting on or
being monitored by the load cells).
The scope of supply and performance of the transducer covers only a small
area of weighing technology, as measurements with (resistive) strain gauge
sensors presuppose the use of electronic signal conditioning. In addition,
equipment planners, installers and operators should plan, implement and
respond to the safety engineering considerations of the weighing technology in
such a way as to minimize residual dangers. Pertinent national and local
regulations must be complied with.
Conversions and modifications
The transducer must not be modified from the design or safety engineering
point of view except with our express agreement. Any modification shall
exclude all liability on our part for any damage resulting therefrom.
Maintenance
PW29P…load cells are maintenance free.
Selling on
If the load cell is sold on, these mounting instructions must be included with the
load cell.
Environmental protection, disposal
In accordance with national and local environmental protection, material
recovery and recycling regulations, old transducers that can no longer be used
must be disposed of separately and not with normal household waste.
If you need more information about disposal, please contact your local
authorities or the dealer from whom you purchased the product.
Safety instructions
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Qualified personnel
Qualified personnel means persons entrusted with siting, mounting, starting up
and operating the product, who possess the appropriate qualifications for their
function.
This includes people who meet at least one of the three following requirements:
1. Knowledge of the safety concepts of automation technology is a
requirement and as project personnel, you must be familiar with these
concepts.
2. As automation plant operating personnel, you have been instructed how to
handle the machinery. You are familiar with the operation of the equipment
and technologies described in this documentation.
3. As system startup engineers or service engineers, you have successfully
completed the training to qualify you to repair the automation systems. You
are also authorized to ground and label circuits and equipment and place
them in operation in accordance with safety engineering standards.
Markings used
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2 Markings used
2.1 The markings used in this document
Important instructions for your safety are specifically identified. It is essential to
follow these instructions in order to prevent accidents and damage to property.
Symbol Significance
WARNING This marking warns of a potentially dangerous
situation in which failure to comply with safety
requirements can result in death or serious physical
injury.
CAUTION This marking warns of a potentially dangerous
situation in which failure to comply with safety
requirements can result in slight or moderate physical
injury.
Notice This marking draws your attention to a situation in
which failure to comply with safety requirements can
lead to damage to property.
Important
This marking draws your attention to important
information about the product or about handling the
product.
Tip
This marking indicates application tips or other
information that is useful to you.
Information
This marking draws your attention to information
about the product or about handling the product.
Emphasis
See….
Italics are used to emphasize and highlight text and
references to other chapters and external documents.
Conditions on site
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3 Conditions on site
Series PW29P load cells are hermetically encapsulated and are therefore not
at all sensitive to the influence of moisture and humidity. The transducers attain
protection class IP68 (test conditions: 100 hours under 1m water column) and
IP69K (water at high pressure, steam cleaner), as per DIN EN60529.
Nevertheless, the load cells must be protected against constant humidity and
moisture.
3.1 Protection against corrosion
The load cell must be protected against chemicals that could attack the
transducer body steel, or the cable.
Notice
Acids and all substances that release ions also attack stainless steels and their
welded seams.
Should there be any corrosion, this could cause the transducer to fail. If this is
the case, you must provide appropriate means of protection.
3.2 Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate
sufficiently to divert some of the measuring force onto the housing, thus
invalidating the measured value (force shunt).
Mechanical installation
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4 Mechanical installation
4.1 Important precautions during installation
SHandle the transducer with care.
SWelding currents must not be allowed to flow over the transducer. If there is
a risk that this might happen, you must provide a suitable low‐ohm
connection to electrically bypass the transducer. HBM provides the highly
flexible EEK ground cable for this purpose, for example, that is screwed on
above and below the transducer.
SMake sure that the transducer cannot be overloaded.
WARNING
There is a danger of the transducer breaking if it is overloaded. This can cause
danger for the operating personnel of the system in which the transducer is
installed.
Implement appropriate safety measures to avoid overloads or to protect
against the resulting dangers.
Notice
Load cells are precision measuring elements and need to be handled carefully.
Dropping or knocking the transducer may cause permanent damage. Make
sure that the transducer cannot be overloaded, including while it is being
mounted.
4.2 Mounting
Attach the load cells at the mounting holes and apply load to the other end.
The screws and tightening torques to be used are given in the following table:
Mechanical installation
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Maximum capacity Thread Min. property class Tightening torque1)
100 … 250kg M8 10.9 35N⋅m
500 … 1000kg M12 10.9 110N⋅m
1) Recommendedvalue for the specified property class. Please comply with the screw
manufacturer's instructions with regard to screw dimensions
Set the overload stop during
installation and fix in position
with a screw locking adhesive
Connector plug
Direction of loading center of platform
Load application
Mounting
Spacing disc
Spacing disc
==
=
=
Fig. 4.1 Load application and installation
Important
Load must not be applied to the side where the cable connection is located, as
this would cause a force shunt.
Setting the overload stop
Type PW29P load cells are fitted with an adjustable overload stop. Set this
overload stop before starting up the load cell.
Mechanical installation
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To do this, load the installed load cell with approx. 120% of the service load, at
the maximum eccentricity for the particular application. The maximum
permissible loadings stated in the specifications must not be exceeded. Note in
particular the “Limit load at max. 100 mm eccentricity" specification, and take
into consideration the moment produced by the eccentricity in your individual
application. Then adjust the screw of the overload stop and fix it in position with
a screw locking adhesive, such as Loctite.
Electrical connection
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5 Electrical connection
The following can be connected for measurement signal conditioning:
SCarrier‐frequency amplifiers
SDC amplifiers
designed for strain gauge measurement systems.
The load cells are supplied in the standard version with an 8‐pin plug in a
six‐wire configuration. The load cells are optionally available with different
cable lengths and with a hygienic design connection cable.
5.1 Connection in a six‐wire configuration
Plug‐in contact 1 = measurement signal (+)
Plug‐in contact 6 = excitation voltage (-)
Plug‐in contact 5 = sense lead (-)
Plug‐in contact 7 = excitation voltage (+)
Plug‐in contact 3 = sense lead (+)
Plug‐in contact 8 = measurement signal (-)
2
3
4
5
6
7
1
8
Plug‐in contact 2 = not in use
Plug‐in contact 4 = not in use
Fig. 5.1 Connector pin assignment
With this connector pin assignment, the output voltage at the measuring
amplifier is positive when the transducer is loaded (see Fig. 4.1). The pin
assignment for the cables available as accessories can be found in Section 8
on page 18.
Electrical connection
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5.2 Connection in a four‐wire configuration
When transducers in a six‐wire configuration are connected to amplifiers in a
four‐wire configuration, the sense leads of the transducer must be connected
to the corresponding excitation voltage leads: Marking (+) with (+) and marking
(-) with (-), see Fig. 5.1. This measure also reduces the cable resistance of the
excitation voltage leads. However, there will be a voltage loss on the supply
leads due to the cable resistance that is still present and not compensated for
by the six‐wire configuration. A large part of this loss can be eliminated by a
calibration, however, the temperature‐dependent part remains.
Important
The TKcvalue given in the specifications for the transducer therefore does not
apply for the cable and transducer combination when connection is in a
four‐wire configuration, where the cable percentage must be added.
5.3 Shortening the cable
If the transducer is connected to an amplifier in a six‐wire configuration, the
transducer cable can be shortened as required, without adversely affecting the
measurement accuracy.
5.4 Extension cable
Only use shielded, low‐capacitance measurement cables for extending. Ensure
that connection is perfect, with a low contact resistance.
The cable of a six‐wire transducer can be extended with a cable of the same
type.
Electrical connection
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5.5 EMC protection
Important
The load cells with shielded, round cables are EMC‐tested in accordance with
EC directives and identified by CE certification. However, you must connect the
shield of the connection cable on the shielding electronics enclosure in order to
achieve EMC protection for the measuring chain.
Electrical and magnetic fields often induce interference voltages in the
measuring circuit. Therefore:
SUse shielded, low‐capacitance measurement cables only (HBM cables fulfill
both conditions).
SDo not route the measurement cables parallel to power lines and control
circuits. If this is not possible, protect the measurement cable with steel
conduits, for example.
SAvoid stray fields from transformers, motors and contact switches.
SDo not ground the transducer, amplifier and indicator more than once.
SConnect all devices in the measuring chain to the same protective earth
conductor.
To ensure the best EMC protection, the load cell, together with the connection
cable and the subsequent electronics, should be placed in a shielded housing.
Dimensions
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7 Dimensions
Dimensions (in mm; 1 mm = 0.03937 inches)
1) M12 for maximum capacities 500kg to 1000kg
2) 1-KAB168: ØD = 14.5; L = 62
1-KAB175: ØD = 16; L = 62
30
38
M12x1.75
8 x M8 (M121))
16
22
75
95.5
37.5
11.5
31
12
ØD
L
1-KAB168/
1-KAB1752)
60
76
25
191
8
Ø16
M12x1
25.5
15.5
Connector plug
Accessories
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8 Accessories
Connection cable
Connection cable with M12 F connector, 8‐pin, TPU IP67,
PUR cable sheath, 5m long
1-KAB168-5
Connection cable with M12 F connector, 8‐pin, TPU IP67,
PUR cable sheath, 20m long
1-KAB168-20
Connection cable with M12 F connector, 8‐pin, stainless steel
IP68/IP69K, hygiene design, 3m long
1-KAB175-3-1
Connection cable with M12 F connector, 8‐pin, stainless steel
IP68/IP69K, hygiene design, 6m long
1-KAB175-6-1
For connection cable specifications, see separate data sheet B3643.
Pin assignment 1-KAB168
Color code Connection
White Measurement signal (+)
Red Measurement signal (-)
Blue Excitation voltage (+)
Pink Excitation voltage (-)
Green Sense lead (+)
Gray Sense lead (-)
Yellow Not in use
Brown Not in use
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