ABB PFCL 201 User manual

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A B B M E A S U R E M E N T & ANALY T I C S
Pressductor Pillowblock Load Cells
Vertical Measuring PFCL 201
User manual
3BSE023881R0101 en Rev H

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Tip
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NOTICE
The information in this document is subject to change without notice and should not be construed as a commitment by ABB
AB. ABB AB assumes no responsibility for any errors that may appear in this document.
In no event shall ABB AB be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising
from the use of this document, nor shall ABB AB be liable for incidental or consequential damages arising from use of any
software or hardware described in this document.
This document and parts thereof must not be reproduced or copied without ABB AB’s written permission, and the contents
thereof must not be imparted to a third party nor be used for any unauthorized purpose.
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ance with the terms of such license.
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This product meets the requirements specied in the RoHS directive 2011/65/EU and EMC directive 2014/30/EU provided
that the installation is carried out in accordance with the instructions given in this manual.
© Copyright 2004- 2018 ABB. All rights reserved.

2Table of Contents
1 Introduction
1.1 About this Manual......................................................................................... 5
1.2 Disposal and Recycling................................................................................. 5
1.2.1 Environmental Policy..................................................................................... 5
1.2.2 Recycling Electrical and Electronic Equipment, WEEE................................... 5
1.2.3 Recycling the Transport Material................................................................... 6
1.2.4 Disposal of the Product................................................................................. 6
1.3 Function and Design..................................................................................... 6
1.3.1 General......................................................................................................... 6
1.3.2 Load Cells PFCL 201.................................................................................... 7
1.3.3 Principle of Measurement.............................................................................. 7
2 Description
2.1 General......................................................................................................... 9
2.2 Technical Data............................................................................................ 10
2.3 Denitions................................................................................................... 11
2.4 Measuring principle of the sensor................................................................ 14
2.5 Mounting Arrangement............................................................................... 14
2.5.1 Coordinate System..................................................................................... 14
2.5.2 Horizontal Mounting.................................................................................... 15
2.5.3 Inclined Mounting........................................................................................ 16
2.6 The Electrical Circuit................................................................................... 17
3 Installation
3.1 General ...................................................................................................... 18
3.2 Unpacking.................................................................................................. 18
3.3 Preparations............................................................................................... 18
3.4 Mounting ................................................................................................... 19
3.5 Cabling for Load Cell PFCL 201CE............................................................. 20

4 Commissioning
4.1 General....................................................................................................... 22
4.2 Preparatory Calculations............................................................................. 22
5 Maintenance
5.1 General....................................................................................................... 23
5.2 Preventive Maintenance.............................................................................. 23
5.3 Spare Parts................................................................................................. 23
6 Fault Tracing
6.1 General....................................................................................................... 25
6.2 Interchangeability........................................................................................ 25
6.3 Fault Tracing Procedure.............................................................................. 25
6.4 Fault Tracing in the Mechanical Installation.................................................. 26
6.4.1 Defective Mounting Surface, Support or Adapter Plates.............................. 26
6.4.2 Force Shunting........................................................................................... 26
6.4.3 Fastening of Load cell and Adapter Plates.................................................. 26
6.4.4 Rolls and Bearings...................................................................................... 26
6.4.5 Driven Roll.................................................................................................. 26
6.5 Fault Tracing of Load Cells, Junction Boxes and wiring............................... 27
A Drawings
A.1 Load Cell PFCL 201C, Dimension Drawing................................................. 29
A.2 Load Cell PFCL 201CE, Dimension Drawing............................................... 30
A.3 Load Cell PFCL 201CD, Dimension Drawing............................................... 31
A.4 Adapter Plate Upper PFCL 201, Dimension Drawing................................... 32
A.5 Adapter Plate Lower PFCL 201, Dimension Drawing................................... 33
Alphabetical index

1Introduction
1.1 About this Manual
This manual describes the load cells PFCL 201C/201CE/201CD in a Pressductor® Strip Tension
Measuring System.
The purpose of this manual is to describe the general function and design of the load cells and also
to be a guidance at installation, commissioning, preventive maintenance and fault tracing.
1.2 Disposal and Recycling
1.2.1 Environmental Policy
ABB is committed to its environmental policy. We strive continuously to make our products envi-
ronmentally more sound by applying results obtained in recyclability and life cycle analyses. Prod-
ucts, manufacturing process as well as logistics have been designed taking into account the envi-
ronmental aspects.
Our environmental management system, certied to ISO 14001, is the tool for carrying out our
environmental policy. However it is on the customer’s responsibility to ensure that local legislation is
followed.
1.2.2 Recycling Electrical and Electronic Equipment, WEEE
The crossed – out wheeled bin symbol on the product(s) and / or accompanying documents
means that used electrical and electronic equipment (WEEE) should not be mixed with general
household waste.
If you wish to discard electrical and electronic equipment (EEE), in the European Union, please
contact your dealer or supplier for further information.
Outside of the European Union, contact your local authorities or dealer and ask for the correct
method of disposal.
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Disposing of this product correctly will help save valuable resources and prevent any potential neg-
ative effects on human health and the environment, which could otherwise arise from inappropriate
waste handling.
1.2.3 Recycling the Transport Material
ABB designs all transport material to be recyclable where practical. The recycling of the transport
material depends on the material type and availability of local recycling programs.
After receiving the system into the site, the package and the transportation locking have to be
removed. Recycle the transport material according to local regulations.
1.2.4 Disposal of the Product
When the product is to be disposed, it should be dismantled and the components recycled
according to local regulations.
1.2.4.1 Dismantling and Recycling of the Product
Dismantle and recycle the components of the product according to local regulations.
CAUTION
Some of the components are heavy! The person who performs the dismantling of
the system must have the necessary knowledge and skills to handle heavy
components to avoid the risk of accidents and injury from occurring.
• Load cell: These parts are made of structural steel, which can be recycled according to
local instructions. All the auxiliary equipment, such as cabling or hoses must be removed
before recycling the material.
1.3 Function and Design
1.3.1 General
A complete measuring system normally consists of two load cells, a junction box, one control unit
with two measurement channels and cabling.
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SUMMATION A+B
INDIVIDUELL A
DIFFERENS A-B
INDIVIDUELL B
A
Sum A+B
Differential A-B
B
Load cells
Adapter plates
Junction box
Load cell cabling
Control unit
Output signals
Figure 1. Complete Measuring System
1.3.2 Load Cells PFCL 201
The load cells are installed under the roll bearings, where they measure forces at right angles to the
mounting surface.
The reactive force from the strip, which is proportional to the strip tension, is transferred to the load
cells via the roll and the bearings.
The load cells are connected to the control unit via a junction box. The control unit converts the
load cell signals to DC voltages that are proportional to the reaction force. Depending on which
control unit is chosen, it is possible to have the analog signals for the two individual load cells (A
and B), the sum of the load cell signals (A+B), and/or the difference between the load cell signals
(A-B).
1.3.3 Principle of Measurement
The load cell only measures force in the direction FR. The measurement force may be positive or
negative. The load cell is normally installed under the roll bearings. When there is a strip in tension
over the roll, the tension (T) gives rise to two force components, one in the direction of measure-
ment of the load cell (FR) and one at right angles (FV).
The measuring force depends on the relationship between the tension (T) and the wrap angle
formed by the strip around the measuring roll.
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FR
T
TFV
Wrap
angle
Wrap
angle
Figure 2. Measuring Roll with Force Vectors
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2Description
2.1 General
The load cell is machined from a single piece of stainless steel. The sensors are machined directly
in the piece of steel and are positioned so that they are sensitive to force in the direction of meas-
urement and insensitive in other directions.
The load cell is mounted on a base with four screws, and the bearing housing is mounted on top
of the load cell with four screws.
Every load cell comes calibrated and temperature compensated.
The load cells PFCL 201C/201CE/201CD are available in four measurement ranges, all variants
have the same external dimensions.
The load cell PFCL 201C is equipped with a connector for the pluggable connection cable.
The load cell PFCL 201CE has a xed connection cable with protective hose.
The load cell PFCL 201CD is provided with an acid-proof cable gland with a xed PTFE- insulated
connection cable.
Measurement
direction
Mounting screw hole
Sensor Connector Mounting screw hole
Figure 3. Load Cell PFCL 201C
Technology
Pressductor R
Fixed cable connector
Figure 4. Load Cell PFCL 201CE with protective hose for cable
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Figure 5. Load Cell PFCL 201CD with insulated cable connection
2.2 Technical Data
Table 1 Technical Data Load Cell PFCL 201
PFCL 201 Type Data Unit
Nominal Loads 1)
Nominal load in measuring direc-
tion, Fnom
C/CD/CE 5 10 20 50 kN
Permitted transverse force within
the accuracy, FVnom (for h = 300
mm)
2,5 5 10 25
Permitted axial load within the
accuracy, FAnom (for h = 300 mm)
1,25 2,5 5 12.5
Extended load in measuring direc-
tion with accuracy class ±1%, Fext
7,5 15 30 75
Max permitted load
In the direction of measurement
without permanent change of data,
Fmax2)
C/CD/CE 50 100 200 5003) kN
In the transverse direction without
permanent change of data, FVmax2)
(for h = 300 mm)
12,5 25 50 125
Spring constant C/CD/CE 250 500 1000 2500 kN/mm
Mechanical data
Length C/CD/CE 450 mm
Width C 110
CD 138
CE 156
Height C/CD/CE 124,6
Weight 37 kg
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