Festo CPX-AB Series User manual

Electronics Manual
CPX analogue
I/Omodules
I/O modules type
 CPX−2AE−U−I
 CPX−4AE−I
 CPX−4AE−T
 CPX−2AA−U−I
Sub−bases type
 CPX−AB−...
CPX terminal
Manual
526 416
en 0503b
[689 008]

Contents and general instructions
I
Festo P.BE−CPX−AX−EN en 0503b
Original de. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Edition en 0503b. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Designation P.BE−CPX−AX−EN. . . . . . . . . . . . . . . . . . . . . . . . .
Order no. 526 416. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E(Festo AG&Co.KG, D73726 Esslingen, Federal Republic of
Germany, 2005)
Internet: http://www.festo.com
E−Mail: [e-mail]
The reproduction, distribution and utilization of this document
as well as the communicaton of its contents to others without
express authorization is prohibited. Offenders will be held
liable for the payment of damages. All rights reserved in the
event of the grant of a patent, utility module or design.

Contents and general instructions
II Festo P.BE−CPX−AX−EN en 0503b
CAGE CLAMP® is a registered trade mark of WAGO Kontakttechnik GmbH,
32385Minden, Germany
TORX® is a registered trade mark of CAMCAR TEXTRON INC., Rockford,
Ill., USA
HARAX® is a registered trade mark of HARTING Deutschland GmbH,
32381Minden, Germany
SPEEDCON® is a registered trade mark of PHOENIX CONTACT GmbH & Co. KG,
32825 Blomberg, Germany

Contents and general instructions
III
Festo P.BE−CPX−AX−EN en 0503b
Contents
Designated use VII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Target group VIII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service VIII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Important user instructions IX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPX analogue I/O modules XI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis via the field bus XII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structure of a CPX terminal XIII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Overview and connectiontechnology I/O modules 1−1. . . . . . . . . . . . . . . . . . .
1.1 Components of an I/O module 1−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Connections 1−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Display and connecting elements 1−7. . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 Combinations of I/O modules and sub−bases 1−8. . . . . . . . . . . . . . . . .
1.2.3 Connecting the cables and plugs to the sub−bases 1−9. . . . . . . . . . . . .
1.3 Assembly 1−19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1 Fitting the sub−bases 1−20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.2 Fitting the screening/shield plates 1−23. . . . . . . . . . . . . . . . . . . . . . . . . .
2. Analogue input moduleCPX−2AE−U−I 2−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Function of the analogue input modules 2−4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Fitting 2−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Installation 2−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1 DIL switch settings 2−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 Pin assignment 2−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.3 Connecting the analogue intputs 2−11. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Instructions on commissioning 2−12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1 Processing analogue input signals 2−12. . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2 General information on parametrizing 2−16. . . . . . . . . . . . . . . . . . . . . . .
2.4.3 Parameters of the analogue input module type CPX−2AE−U−I 2−18. . . . .
2.4.4 Module parameter Input analogue−value data format" 2−26. . . . . . . .
2.4.5 Channel−specific module parameters  Limits 2−28. . . . . . . . . . . . . . . . .
2.4.6 Channel−specific module parameters  Filter measured value 2−31. . . .
2.4.7 Channel−specific module parameters  Monitor of wire fracture 2−31. .

Contents and general instructions
IV Festo P.BE−CPX−AX−EN en 0503b
2.5 Diagnosis 2−32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5.1 Fault messages of the analogue input modules 2−33. . . . . . . . . . . . . . .
2.5.2 LED display 2−35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5.3 Fault treatment and parametrizing 2−37. . . . . . . . . . . . . . . . . . . . . . . . . .
3. Analogue input moduleCPX−4AE−I 3−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Function of the analogue input modules 3−4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Fitting 3−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Installation 3−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 DIL switch settings 3−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 Pin assignment 3−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.3 Connecting the analogue intputs 3−11. . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Instructions on commissioning 3−12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 Processing analogue input signals 3−12. . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.2 General information on parametrizing 3−16. . . . . . . . . . . . . . . . . . . . . . .
3.4.3 Parameters of the analogue input module type CPX−4AE−I 3−18. . . . . . .
3.4.4 Module parameter Input analogue−value data format" 3−27. . . . . . . .
3.4.5 Channel−specific module parameters  Limits 3−29. . . . . . . . . . . . . . . . .
3.4.6 Channel−specific module parameters  Filter measured value 3−32. . . .
3.4.7 Channel−specific module parameters  Monitor of wire fracture 3−32. .
3.5 Diagnosis 3−33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.1 Fault messages of the analogue input modules 3−34. . . . . . . . . . . . . . .
3.5.2 LED display 3−36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.3 Fault treatment and parametrizing 3−38. . . . . . . . . . . . . . . . . . . . . . . . . .
4. Analogue input moduleCPX−4AE−T 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Function of analogue input module CPX−4AE−T 4−4. . . . . . . . . . . . . . . . . . . . . . .
4.2 Fitting 4−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Installation 4−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 DIL switch settings 4−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Pin assignment 4−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3 Connecting temperature sensors to the analogue inputs 4−11. . . . . . . .

Contents and general instructions
V
Festo P.BE−CPX−AX−EN en 0503b
4.4 Instructions on commissioning 4−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Processing the input signals of temperature sensors 4−14. . . . . . . . . . .
4.4.2 General information on parametrizing 4−17. . . . . . . . . . . . . . . . . . . . . . .
4.4.3 Parameters of the analogue input module type CPX−4AE−T 4−18. . . . . .
4.4.4 Monitoring wire fracture/short circuit 4−26. . . . . . . . . . . . . . . . . . . . . . .
4.4.5 Limit value monitoring by parametrizing 4−26. . . . . . . . . . . . . . . . . . . . .
4.4.6 Measured value smoothing by parametrizing 4−27. . . . . . . . . . . . . . . . .
4.5 Diagnosis 4−28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.1 Error messages of the analogue input modules 4−29. . . . . . . . . . . . . . .
4.5.2 LED display 4−31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.3 Error treatment and parametrizing 4−33. . . . . . . . . . . . . . . . . . . . . . . . . .
5. Analogue output moduleCPX−2AA−U−I 5−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Function of the analogue output modules 5−4. . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Fitting 5−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Installation 5−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 DIL switch settings 5−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Pin assignment 5−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Connecting the analogue outputs 5−11. . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Instructions on commissioning 5−12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.1 Processing analogue output signals 5−12. . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 General information on parametrizing 5−15. . . . . . . . . . . . . . . . . . . . . . .
5.4.3 Parameter with analogue output module type CPX−2AA−U−I 5−17. . . . .
5.4.4 Module parameter Output analogue−value data format" 5−27. . . . . . .
5.4.5 Channel−specific module parameter  Limits 5−29. . . . . . . . . . . . . . . . . .
5.4.6 Channel−specific module parameters  Monitor wire fracture 5−31. . . .
5.5 Diagnosis 5−32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5.1 Fault messages of the anaolgue output modules 5−33. . . . . . . . . . . . . .
5.5.2 LED display 5−37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5.3 Fault treatment and parametrizing 5−39. . . . . . . . . . . . . . . . . . . . . . . . . .

Contents and general instructions
VI Festo P.BE−CPX−AX−EN en 0503b
A. Technical appendix A−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1 Technical specifications of analogue input module CPX−2AE−U−I A−3. . . . . . . . .
A.2 Technical specifications of analogue input module CPX−4AE−I A−5. . . . . . . . . . .
A.3 Technical specifications of analogue input module CPX−4AE−T
(temperature module) A−7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.4 Technical specifications of analogue output module CPX−2AA−U−I A−9. . . . . . . .
A.5 Technical specifications of the sub−bases A−11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.6 Internal structure of the CPX modules A−12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.7 Connection examples A−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.7.1 Analogue input and output modules A−14. . . . . . . . . . . . . . . . . . . . . . . .
A.7.2 Connecting temperature sensors to the CPX−4AE−T A−17. . . . . . . . . . . .
A.8 Accessories A−19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. Index B−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents and general instructions
VII
Festo P.BE−CPX−AX−EN en 0503b
Designated use
The CPX analogue I/O modules described in this manual have
been designed exclusively for use in conjunction with CPX
terminals from Festo. The analogue I/O modules are only to
be used as follows:
inaccordance with designated use
infaultless technical condition
 without any modifications by the user.
If additional commercially−available components such as
sensors and actuators are connected, the specified limits for
pressures, temperatures, electrical data, torques, etc. must
not be exceeded.
Please observe the standards specified in the relevant
chapters and comply with technical regulations, as well as
with national and local regulations.
Warning
·In order to provide the electric power supply, use only
PELV circuits as per IEC/DIN EN 60204−1 (Protective
Extra−Low Voltage, PELV).
Take into account also the general requirements for
PELV circuits as per IEC/DIN EN 60204−1.
·Use only power packswhich guarantee reliable electri
cal isolation of the operating voltage as per IEC/DIN
EN60204−1.
By the use of PELV power units, protection against electric
shock (protection against direct and indirect contact) is guar
anteed in accordance with IEC/DIN EN 60204−1 (electrical
equipment of machines, general requirements).

Contents and general instructions
VIII Festo P.BE−CPX−AX−EN en 0503b
Target group
This manual is intended exclusively for technicians trained in
control and automation technology, who have experience in
installing, commissioning, programming and diagnosing
programmable logic controllers (PLC) and field bus systems.
Service
Please consult your local Festo repair service if you have any
technical problems.

Contents and general instructions
IX
Festo P.BE−CPX−AX−EN en 0503b
Important user instructions
Danger categories
This manual contains instructions on the possible dangers
which may occur if the product is not used correctly. These
instructions are marked (Warning, Caution, etc.), printed on a
shaded background and marked additionally with a picto
gram. A distinction is made between the following danger
warnings:
Warning
This means that failure to observe this instruction may
result in serious personal injury or damage to property.
Caution
This means that failure to observe this instruction may
result in personal injury or damage to property.
Please note
This means that failure to observe this instruction may
result in damage to property.
The following pictogram marks passages in the text which
describe activities with electrostatically sensitive compo
nents.
Electrostatically sensitive components may be damaged if
they are not handled correctly.

Contents and general instructions
XFesto P.BE−CPX−AX−EN en 0503b
Marking special information
The following pictograms mark passages in the text contain
ing special information.
Pictograms
Information:
Recommendations, tips and references to other sources of
information.
Accessories:
Information on necessary or sensible accessories for the
Festo product.
Environment:
Information on environment−friendly use of Festo products.
Textmarkings
·The bullet indicates activities which may be carried out in
any order.
1. Figures denote activities which must be carried out in the
numerical order specified.
 Hyphens indicate general activities.

Contents and general instructions
XI
Festo P.BE−CPX−AX−EN en 0503b
CPXanalogue I/O modules
Analogue I/O modules for CPX terminals are available as
input or output modules. This manual contains information
on the method of operation, the fitting and installation of the
following modules:
Analogue I/O modules Type
designation
DescriptionSub−bases and
manifold sub−bases
CPX−2AE−U−I Input module with
2analogue inputs,
signal range can be
selected per input
channel:
0... 10 V
0... 20 mA
4... 20 mA
The I/O modules each
consist of the electronic
module as well as a
sub−base and a manifold
sub−base.
Sub−bases:
(Note the possible combina
tions in section 1 2 2)
CPX−4AE−I Input module with
4analogue inputs,
signal range can be
selected per input
channel:
0... 20 mA
4... 20 mA
tions in section 1.2.2).
 CPX−AB−4−M12x2−5POL
 CPX−AB−4−M12x2−5POL−R
 CPX−AB−8−KL−4POL
 CPX−AB−1−SUB−BU−25POL
 CPX−AB−4−HARX2−4POL
CPX−4AE−T Input module with up to
4 analogue inputs for
registering the
temperature. Number
of inputs can be
selected with DIL
switch (2 or 4).
Manifold sub−bases:
 CPX−GE−EV
 CPX−GE−EV−...
CPX−2AA−U−I Output module with
2analogue outputs,
signal range can be
selected per output
channel:
0... 10 V
0... 20 mA
4... 20 mA
Tab.0/1: Overview of analogue I/O modules

Contents and general instructions
XII Festo P.BE−CPX−AX−EN en 0503b
Diagnosis via thefield bus
Depending on the parametrizing, CPX I/O modules register
the specific faults via the field bus.
These can be evaluated via the:
 status bits (system status)
 I/O diagnostic interface (system diagnosis)
 module diagnosis
 fault numbers.
Further information on diagnosis can be found in the CPX
system manual or in the manual for the field bus node.

Contents and general instructions
XIII
Festo P.BE−CPX−AX−EN en 0503b
Structureof aCPXterminal
CPX terminals consist of electric function modules, individual
modules and components. The diagram below shows an
example:
ÖÖ
ÖÖ
ÖÖ
Ö
Ö
Ö
ÖÖÖÖ
ÖÖÖÖ
ÖÖÖÖ
Ö
Ö
Ö
Ö
Ö
ÖÖ
ÖÖ
ÖÖ
Ö
Ö
ÖÖ
ÖÖ
ÖÖ
ÖÖÖ
ÖÖÖ
12 3 4
5
6
7
8
1Field bus node
2I/O modules
3Pneumatic interface
4Pneumatic modules
(example CPA  type 12)
5Interlinking block with additional power
supply
6Manifold sub−base without supply
7Interlinking block with system supply
8End plate
Fig.0/1: Example of CPX terminal

Contents and general instructions
XIV Festo P.BE−CPX−AX−EN en 0503b
VersionTitle Electronics
Electronics
Manual
System manual"
type P.BE−CPX−SYS−...
Overview of structure, components and
method of operation of CPX terminals;
installation and commissioning instructions
as well as basic principles of parametrizing
CPX field bus node"
type P.BE−CPX−FB...
Instructions on the assembly, installation,
commissioning and diagnosis of the relevant
field bus nodes
CPX I/O modules"
type P.BE−CPX−EA−...
Notes on connection types and instructions
on fitting, installing and commissioning input
and output modules of type CPX−... , the MPA
pneumatic modules, as well as MPA, CPA and
Midi/Maxi pneumatic interfaces
CPX analogue I/O modules"
type P.BE−CPX−AX−...
Notes on connection types and instructions
on fitting, installing and commissioning CPX
analogue I/O modules
CPX−CP interface"
type P.BE−CPX−CP−...
Instructions on commissioning and
diagnosing CPX terminals with the CP
interface type CPX−CP−4−FB
Handheld"
type P.BE−CPX−MMI−1−...
Instructions on commissioning and
diagnosing CPX terminals with the handheld
type CPX−MMI−1
CPX−FEC"
Type P.BE−CPX−FEC−...
Instructions on fitting, installing,
commissioning and diagnosing for the CPX
Front End Controller.
Software
package
FST" Programming in Statement List and Ladder
Diagram for the FEC
Pneumatics
Manual
Valve terminals with MPA
pneumatics"
type P.BE−MPA−...
Instructions on fitting, installing and
commissioningMPA pneumatics (type 32)
Valve terminals with CPA
pneumatics"
type P.BE−CPA−...
Instructions on fitting, installing and
commissioningCPA pneumatics (type 12)
Valve terminals with
Midi/Maxipneumatics"
type P.BE−MIDI/MAXI−03−...
Instructions on fitting, installing and commis
sioning Midi/Maxi pneumatics (type 03)
Tab.0/2: Manuals on the CPX terminal

Contents and general instructions
XV
Festo P.BE−CPX−AX−EN en 0503b
The following product−specific terms and abbreviations are
used in this manual:
Term/abbreviationMeaning
AI Analogue input (input channel, 16 bits)
Analogue I/Os Analogue inputs and outputs
Analogue input module CPX input module with analogue inputs
Analogue output module CPX output module with analogue outputs
AO Analogue output (output channel, 16 bits)
CPX modules Common term for the various modules which can be incorporated in a
CPX terminal
CPX terminal Modular electric terminal type 50
Data The CPX terminal provides settings and diagnostic information in the
form of data. Data can be read but not modified
DIL switch Dual−in−line switches consist of several switch elements with which set
tings can be made
I/O diagnostic interface The I/O diagnostic interface is a bus−independent diagnostic interface at
I/O level, permitting access to internal data of the CPX terminal
I/O modules Common term for the CPX modules which provide inputs and outputs
(CPX input modules and CPX output modules)
IU / II Analogue voltage / current input
OU / OI Analogue voltage / current output
Sub−base Replaceable upper part of housing om modules with connection design
Tab.0/3: Product−specific abbreviations  part 1

Contents and general instructions
XVI Festo P.BE−CPX−AX−EN en 0503b
Term/abbreviation Meaning
Field bus node Provides the connection to specific field buses. Transmits control signals
to the connected modules and monitors their ability to function
Manifold sub−base Lower part of the housing of a module or block for linking the module
electrically with the terminal
Parameter With the aid of parametrizing, the reaction of the CPX terminal or the
reaction of the individual modules and I/O channels can be adapted to
each particular application. Parameters can be read and modified
PLC/IPC Programmable logic controller/industrial PC
Status bits Internal inputs which supply coded common diagnostic messages
Tab.0/4: Product−specific abbreviations  part 2

Overview and connectiontechnology I/O modules
1−1Festo P.BE−CPX−AX−EN en 0503b
Chapter 1

1. Overview and connection technology I/O modules
1−2 Festo P.BE−CPX−AX−EN en 0503b
Contents
1. Overview and connectiontechnology I/O modules 1−1. . . . . . . . . . . . . . . . . . .
1.1 Components of an I/O module 1−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Connections 1−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Display and connecting elements 1−7. . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 Combinations of I/O modules and sub−bases 1−8. . . . . . . . . . . . . . . . .
1.2.3 Connecting the cables and plugs to the sub−bases 1−9. . . . . . . . . . . . .
1.3 Assembly 1−19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1 Fitting the sub−bases 1−20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.2 Fitting the screening/shield plates 1−23. . . . . . . . . . . . . . . . . . . . . . . . . .