HBK PW27AP User manual

PW27AP
ENGLISH DEUTSCH FRANÇAIS
Mounting Instructions
Montageanleitung
Notice de montage

Hottinger Brüel & Kjaer GmbH
Im Tiefen See 45
D-64293 Darmstadt
Tel. [phone]
Fax [phone]
[email protected]
www.hbkworld.com
Mat.: 7-0201.0003-1
DVS: A05202 02 Y00 02
06.2023
EHottinger Brüel & Kjaer 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 allge
meiner Form. Sie stellen keine Beschaffenheits- oder
Haltbarkeitsgarantie 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.

PW27AP
ENGLISH DEUTSCH FRANÇAIS
Mounting Instructions

PW27AP
TABLE OF CONTENTS
2
TABLE OF CONTENTS
1 Safety instructions 3................................................
2 Markings used 6....................................................
2.1 The markings used in this document 6.................................
2.2 Symbols on the product 6............................................
3 Conditions on site 7.................................................
3.1 Protection against corrosion 7........................................
3.2 Cleaning 7.........................................................
3.3 Deposits 7.........................................................
4 Mechanical installation 8............................................
4.1 Important precautions during installation 8..............................
4.2 Mounting 8........................................................
5 Electrical connection 10..............................................
5.1 Connection in a six‐wire configuration 10................................
5.2 Connection in a four‐wire configuration 10...............................
5.3 Shortening the cable 11...............................................
5.4 Extension cable 11...................................................
5.5 Parallel connection 11................................................
5.6 EMC protection 11...................................................
6 Dimensions 13......................................................
7 Accessories 14......................................................
8 Specifications 16....................................................

3
PW27AP
SAFETY INSTRUCTIONS
1 SAFETY INSTRUCTIONS
Appropriate use
Load cells of the PW27AP…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 sheetsmust 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.
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.

PW27AP
SAFETY INSTRUCTIONS
4
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.
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
PW27AP…load cells are maintenance free.

5
PW27AP
SAFETY INSTRUCTIONS
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.
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.

PW27AP
MARKINGS USED
6
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 situ
ation in which failure to comply with safety require
ments 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 in
formation 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
identify references to sections, diagrams, or external
documents and files.
2.2 Symbols on the product
CE mark
The CE mark enables the manufacturer to guarantee that the
product complies with the requirements of the relevant EC direc
tives (the declaration of conformity is available at
http://www.hbm.com/HBMdoc
).

7
PW27AP
CONDITIONS ON SITE
3 CONDITIONS ON SITE
Series PW27AP 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 1 m 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 Cleaning
The load cell has been designed according to the EHEDG design guidelines to allow for
easy, mild cleaning. When mounting the load cell, make certain it can be reached from all
sides for cleaning. Cleaning can be performed without dismounting the load cell and
should be done regularly. The surface of the load cell must not be damaged with sharp-
edged brushes during cleaning.
3.3 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).

PW27AP
MECHANICAL INSTALLATION
8
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 scope of
supply includes two seals for sealing the gap surfaces on the face against microbiologi
cal contamination. The screws and tightening torques to be used are given in the
following table:
Version Thread Max. thread reach Min. property class Tightening torque1)
Standard M6 14 mm 8.8 10 N⋅m
Rustless M6 14 mm A2-70 or A4-70 10 N⋅m
1) Recommendedvalue for the specified property class. Please comply with the screw manufacturer's
instructions with regard to screw dimensions.

9
PW27AP
MECHANICAL INSTALLATION
Product contact area
Two seals
(in scope of supply)
Load application/
platform center
Non-product contact area
The installation has to be done with sealed, easy-to-clean and EHEDG
certified M6 screws.
Freudenberg Hygienic USIT Washers 70 EPDM 291 for M6 (HBM
accessory number E-9278.0013) can be used for sealing the screws.
* According to the EHEDG design guidelines a minimum dis
tance of 6 mm is recommended for easy cleanability.
min. 6* min. 6*
Installation: 2x M6
Connector plug
Fig. 4.1 Installation according to hygienic design criteria
Important
Load must not be applied to the side where the cable connection is located, as this would
cause a force shunt.

PW27AP
ELECTRICAL CONNECTION
10
5 ELECTRICAL CONNECTION
The following can be connected for measurement signal conditioning:
SCarrier‐frequency amplifiers
SDC amplifiers
designed for strain gauge measurement systems.
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 7 on page 14.
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.

11
PW27AP
ELECTRICAL CONNECTION
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.
5.5 Parallel connection
Only load cells with an aligned output (nominal (rated) sensitivity and output resistance)
are suitable for parallel connection. This option is not available with type PW27AP load
cells.
5.6 EMC protection
Electrical and magnetic fields often induce interference voltages in the measuring circuit.
To ensure reliable measurement, however, the transducer must be able to transmit signal
differences of a few μV to the analysis unit without interference.
Planning the shielding design
Due to the numerous application options and differing local constraints, we can only
provide you with general information on correct connection. The shielding design suitable
for your application must be planned locally by an appropriate specialist.
HBM load cells with shielded, round cables are EMC-tested in accordance with the
EU Directive and bear the CE mark. Voltage surges as per EN 61000-4-5 can give rise to
deviations from the load cell’s specified accuracy. These surges in plants are caused by
lightning strikes or switching operations in power circuits, for example, and disappear
again when interference is no longer active. This is particularly evident with cables over
30 m long or if the equipment is used outdoors. Customers should take additional pre
cautions in these cases.
Please note:
SConnect the connecting cable shield all over the surface of the shielding electronics
housing. When using several load cells, connect the shields all over the surface of the

PW27AP
ELECTRICAL CONNECTION
12
junction box (combination of transducer signals, e.g. type VKK2 from HBM). From
there, connect the measurement cable for the electronics over the surface of the
junction box and the shielding electronics housing.
SThe shield of the connecting cable must not be used for discharging potential
differences within the system. You must therefore lay sufficiently dimensioned
potential equalization lines to compensate for possible potential differences.
SUse shielded low-capacitance measurement cables only (HBM cables fulfill these
conditions).
SDo not route measurement cables parallel to electric cables, especially power lines
and control circuits. If this is not possible, protect the measurement cable, for
example with steel conduits.
SAvoid stray fields from transformers, motors and contact switches.

13
PW27AP
DIMENSIONS
6 DIMENSIONS
C
C
C-C
Fitting depth, min. 3 mm
30°
Ø27±0.02
130±0.2
Ø43.5
22.8
M12x1
7
4.05
6.75±0.02
6.75±0.02 12.8
Ø4.1±0.02
Ø38
60
Ø14
Ø16
14
Ø24±0.1
M6
1) 1-KAB168: ØD = 14.5; L = 60
1-KAB177: ØD = 14; L = 60
1-KAB168 or
1-KAB1771)
L
ØD

PW27AP
ACCESSORIES
14
7 ACCESSORIES
Connection cable
Connection cable with M12 F connector, 8‐pin, TPU IP67, PUR cable
sheath, 5m long
1-KAB168-5
Connection cable with M12 F connector, 8‐pin, TPU IP67, PUR cable
sheath, 20m long
1-KAB168-20
Connection cable with M12 F connector, 8‐pin, stainless steel
IP68/IP69K, hygiene design, 3m long
1-KAB177-3-1
Connection cable with M12 F connector, 8‐pin, stainless steel
IP68/IP69K, hygiene design, 6m long
1-KAB177-6-1
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

15
PW27AP
ACCESSORIES
Pin assignment 1-KAB177
Color code Connection
White Measurement signal (+)
Red Measurement signal (-)
Blue Excitation voltage (+)
Black Excitation voltage (-)
Green Sense lead (+)
Gray Sense lead (-)
Spare part
One set of replacement seals, consisting of two seals (EPDM), order no. E-9278.0015-1

PW27AP
SPECIFICATIONS
16
8 SPECIFICATIONS
Information
Further product information can be found at www.hbm.com/pw.

PW27AP
ENGLISH DEUTSCH FRANÇAIS
Montageanleitung

PW27AP
INHALTSVERZEICHNIS
2
INHALTSVERZEICHNIS
1 Sicherheitshinweise 3...............................................
2 Verwendete Kennzeichnungen 6......................................
2.1 In dieser Anleitung verwendete Kennzeichnungen 6......................
2.2 Auf dem Gerät angebrachte Symbole 6.................................
3 Bedingungen am Einbauort 7.........................................
3.1 Korrosionsschutz 7.................................................
3.2 Reinigung 7........................................................
3.3 Ablagerungen 7.....................................................
4 Mechanischer Einbau 8..............................................
4.1 Wichtige Vorkehrungen beim Einbau 8.................................
4.2 Montage 8.........................................................
5 Elektrischer Anschluss 10............................................
5.1 Anschluss in Sechsleiter‐Technik 10....................................
5.2 Anschluss in Vierleiter‐Technik 10......................................
5.3 Kabelkürzung 11.....................................................
5.4 Kabelverlängerung 11................................................
5.5 Parallelschaltung 11..................................................
5.6 EMV-Schutz 11......................................................
6 Abmessungen 13....................................................
7 Zubehör 14.........................................................
8 Technische Daten 16.................................................