Festo CPX-CMPX User Manual

CPX terminal

Description

Electronics

System manual

Installing and commissioning CPX terminals

Description

526 446 en 0902e [742939]

Contents and general safety instructions

Original . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . en
Edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . en 0902e
Designation . . . . . . . . . . . . . . . . . . . . . . . .	P.BE−CPX−SYS−EN
Order no. . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . 526 446

E (Festo AG & Co. KG, D 73726 Esslingen, Germany, 2009)

Internet: http://www.festo.com

E−mail: [e-mail]

The copying, distribution and utilisation of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for compensation of damages. All rights are reserved, in particular the right to carry out patent, registered design or ornamental design registration.

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Contents and general safety instructions

HARAX®, INTEL®, Interbus®, Modbus®, MOTOROLA®, PROFIBUS®, Push−Pull®, TÜV® and VDE® are registered trademarks of the respective trademark owners in certain countries.

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Contents and general safety instructions

Contents

Intended use . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	VII
Range of application and certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			VIII
Target group . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	IX
Service	. . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	IX
Important user instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			X
Notes on the use of this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			XII
1.	Overview of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		1−1
1.1	Structure of the CPX terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		1−3
	1.1.1	Mode of operation of the CPX terminal . . . . . . . . . . . . . . . . . . . . . .	1−7
	1.1.2	Structure of the electric CPX modules . . . . . . . . . . . . . . . . . . . . . . .	1−17
	1.1.3	The power supply concept of the CPX terminal . . . . . . . . . . . . . . . .	1−19
1.2	Commissioning, diagnosis and operational functions . . . . . . . . . . . . . . . . . .		1−24
2.	Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		2−1
2.1	General instructions on assembly and dismantling . . . . . . . . . . . . . . . . . . . .		2−3
2.2	Assembling electric modules with plastic interlinking blocks . . . . . . . . . . . .		2−6

2.2.1Replacing a complete module or interlinking block with tie rod

interlinking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2−7 2.2.2 Increasing or reducing the number of electric modules . . . . . . . . . 2−10 2.2.3 Fitting the right−hand end plates with Midi/Maxi valves . . . . . . . . . 2−15

2.3 Assembling electric modules with metal interlinking blocks . . . . . . . . . . . . . 2−17 2.3.1 Replacing a complete module or interlinking block . . . . . . . . . . . . 2−18 2.4 Fitting the CPX terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2−21 2.4.1 Fitting CPX terminals without pneumatics onto a H−rail . . . . . . . . . 2−21 2.4.2 Fitting CPX terminals with pneumatics onto an H−rail . . . . . . . . . . . 2−22 2.4.3 Fitting CPX terminals with Midi/Maxi pneumatics onto an H−rail . . 2−26 2.4.4 Wall mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2−29

3.	Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		3−1
3.1	General installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		3−3
	3.1.1	Connecting cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3−3

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	3.1.2	Configuration of the CPX bus node . . . . . . . . . . . . . . . . . . . . . . . . .	3−6
	3.1.3	Configuration of the pneumatics . . . . . . . . . . . . . . . . . . . . . . . . . . .	3−7
	3.1.4	Selecting the power supply unit . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3−8
	3.1.5	Power supply of the CPX terminal . . . . . . . . . . . . . . . . . . . . . . . . . .	3−12
4.	Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4−1
4.1	Procedure for commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4−3
4.2	Preparing the CPX terminal for commissioning . . . . . . . . . . . . . . . . . . . . . . .		4−4
	4.2.1	Parameter types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4−6
	4.2.2	Possibilities of parametrisation . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4−9
4.3	Start−up behaviour of the CPX terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4−10
5.	Diagnostics and error handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		5−1
5.1	General notes on diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		5−3
	5.1.1	On the spot diagnosis with LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . .	5−5
	5.1.2	CPX−specific LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5−6
5.2	Diagnosis via status bits or the I/O diagnostic interface . . . . . . . . . . . . . . . .		5−11
	5.2.1	Structure of the status bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5−12
	5.2.2	The I/O diagnostic interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5−14
	5.2.3	Error numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5−19
A.	Technical appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		A−1
A.1	Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		A−3
A.2	Cable length and cross−sectional area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		A−7
B.	Parameters and data of the CPX terminal . . . . . . . . . . . . . . . . . . . . . . . . . . .		B−1
B.1	Access to internal parameters and data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		B−3
B.2	Description of the parameters and data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		B−4
	B.2.1	Overview of the function numbers . . . . . . . . . . . . . . . . . . . . . . . . . .	B−5
	B.2.2	System parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	B−8
	B.2.3	Module parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	B−15
	B.2.4	Diagnostic memory parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . .	B−23
	B.2.5	Diagnostic memory data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	B−29

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B.2.6 System diagnostic data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B−32 B.2.7 Module diagnostic data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B−34 B.2.8 System data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B−36 B.2.9 Module data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B−42

C.	General information on parametrisation . . . . . . . . . . . . . . . . . . . . . . . . . . .		C−1
C.1	Input debounce time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		C−3
C.2	Signal extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		C−5
C.3	Influence of signal states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		C−8
	C.3.1	Force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	C−11
	C.3.2	Signal status in the event of a fault (Fail safe) . . . . . . . . . . . . . . . . .	C−15
	C.3.3	Signal status in Idle status (Idle mode) . . . . . . . . . . . . . . . . . . . . . .	C−18
C.4	Diagnostic memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		C−20
C.5	Monitoring errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		C−23
D.	Index . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	D−1

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Contents and general safety instructions

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Contents and general safety instructions

Intended use

CPX terminals are intended for installation in machines or automation systems. Depending on the CPX bus node used, they can be connected to a special field bus system and serve to interrogate sensor signals and to control pneumatic and electric actuators.

The individual CPX modules of the CPX terminal are docu mented in specific manuals. The safety instructions listed in the manuals must always be observed and the relevant CPX module must only be used as intended. CPX modules and cables are only to be used as follows:

Only in an industrial environment

As intended

In original status without unauthorised modifications. Only the conversions or modifications described in the documentation supplied with the product are permitted.

In perfect technical condition.

When used together with commercially available compo nents, such as sensors and actuators, the specified limits for pressures, temperatures, electrical data, torques etc. must be observed. Also observe the standards specified in the rele vant chapters, as well as national and local laws and technical regulations.

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Contents and general safety instructions

Range of application and certification

The product fulfils the requirements of the EU directives and is marked with the CE marking symbol.

Standards and test values, which the product must comply with and fulfil, can be found in the section •Technical data". The product−relevant EU directive can be found in the decla ration of conformance.

Certain configurations of the product have been certified by

Underwriters Laboratories Inc. (UL) for the USA and Canada.

These configurations are marked as follows:

UL Recognized Component Mark for Canada and the United

States

Note

Observe the following if the UL requirements are to be complied with in your application:

Rules for observing the UL certification can be found in the separate UL−specific documentation. The relevant technical specifications listed there also apply here.

The technical specifications in this documentation may show different values.

VIII	Festo P.BE−CPX−SYS−EN en 0902e

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Target group

This manual is directed exclusively at technicians trained in control and automation technology.

Service

Please consult your local Festo repair service if you have any technical problems.

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Contents and general safety instructions

Important user instructions

Danger categories

This manual contains instructions on the possible dangers which can 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

... means that failure to observe this instruction may result in serious personal injury or material damage.

Caution

... means that failure to observe this instruction may result in personal injury or material damage.

Note

... means that failure to observe this instruction may result in material damage.

The following pictogram marks passages in the text which describe activities with electrostatically sensitive devices:

Electrostatically sensitive devices: inappropriate handling can result in damage to components.

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Contents and general safety instructions

Identification of specific information

The following pictograms designate texts that contain special information.

Pictograms

Information:

Recommendations, tips and references to other sources of information

Accessories:

Information about necessary or useful accessories for the

Festo product.

Environment:

Information on the environmentally friendly use of

Festo products.

Text designations

·Bullet points indicate activities that may be carried out in any order.

1.Numerals denote activities which must be carried out in the numerical order specified.

Arrowheads indicate general lists.

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Contents and general safety instructions

Notes on the use of this manual

This manual contains general basic information on the me thod of operation, on fitting, installing and commissioning CPX terminals.

Special information on commissioning, parameterising and diagnosing a CPX terminal with the CPX bus node you are using can be found in the appropriate manual for the CPX bus node.

Information about further CPX modules can be found in the manual for the relevant module. An overview is provided in Table 0/1.

Conventions

The parameters and data of the CPX terminal are described in

Appendix B.2. These appear in English on the handheld type

CPX−MMI−1.

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Contents and general safety instructions

Type	Title			Description
Description	•System description"			Overview of structure, components and mode
Electronics	Type P.BE−CPX−SYS−...			of operation of CPX terminals;
				installation and commissioning instructions as
				well as basic principles of parametrisation
	•CPX bus node"			Instructions on assembly, installation, commis
	Type P.BE−CPX−FB...			sioning and diagnostics of the relevant bus
				nodes
	•CPX I/O modules"			Notes on connections and instructions on fit
	Type P.BE−CPX−EA−...			ting, installing and commissioning input and
				output modules of type CPX−.... and the MPA,
				CPA and Midi/Maxi pneumatic interfaces
	•CPX analogue I/O mo			Notes about connection types and instructions
	dules"			for fitting, installing and commissioning CPX
	Type P.BE−CPX−AX−...			analogue I/O modules
	"CPX−CP interface"			Instructions on fitting, installing, commissio
	Type P.BE−CPX−CP−..			ning and diagnosing CP systems with the
				CP interface type CPX−CP−4−FB
	•Handheld"			Instructions for commissioning and diagnosing
	Type P.BE−CPX−MMI−1−..			CPX terminals with the handheld type CPX−
				MMI−1
	•MPA electronics modu			Instructions on assembly, installation, commis
	les"			sioning and diagnostics of the MPA pneumatic
	Type P.BE−MPA−			and electronic modules.
	ELEKTRONIK−...
Manual	•CPX−FEC"			Instructions for fitting, installing,
Electronics	Type P.BE−CPX−FEC−...			commissioning and diagnosing the
				CPX Front End Controller.
Software	•FST"			Programming in statement list and ladder
package				diagram for the FEC

Table 0/1: Descriptions for the CPX terminal part 1

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Type	Title			Description
Description	•Valve terminals with			Instructions for fitting, installing, commissio
Pneumatics	MPA pneumatics"			ning, maintaining and converting the MPA
	Type P.BE−MPA−...			pneumatics
	•Valve terminals with			Instructions for fitting, installing, commissio
	CPA pneumatics"			ning, maintaining and converting the CPA
	Type P.BE−CPA−...			pneumatics (type 12)
	•Valve terminals with			Instructions for fitting, installing, commissio
	Midi/Maxi pneumatics"			ning, maintaining and converting the Midi/
	Type P.BE−Midi/			Maxi pneumatics (type 03)
	Maxi−03−...

Table 0/2: Descriptions for the CPX terminal part 2

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Contents and general safety instructions

Term/abbreviation	Meaning
Connection block	Exchangeable housing upper part of modules with connection technology.
CP	Compact Performance
CPX bus node	Provides the connection to specific fieldbuses. Transmits control signals
	to the connected modules and monitors their ability to function.
CPX terminal	Modular, electric terminal type 50
CPX modules	Collective term for the various modules which can be integrated in a CPX
	terminal.
DIL switch	Dual−in−line switches consist of several logic elements with which settings
	can be made.
Fieldbus	Data bus via which the CPX modules communicate with each other and
	are supplied with the necessary operating voltage.
Function modules	Function modules are also known as technology modules (e.g. CPX−CP
	interface)
Input module	CPX input module
Interlinkingblock	Lower part of the housing of a module or block for interlinking the module
	electrically with the terminal
I	Digital input
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 digital inputs and out
	puts (CPX input modules and CPX output modules).
I/Os	Digital inputs and outputs
NBR	Nitrile butadiene rubber, material for seals
O	Digital output
Output module	CPX output module
PLC/IPC	Programmable logic controller/industrial PC
Pneumatic interface	The pneumatic interface is the interface between the modular electrical
	peripherals and the pneumatics.

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Term/abbreviation	Meaning
Status bits	Internal inputs that supply coded common diagnostic messages
Technology modules	Function modules are also known as technology modules (e.g. CPX−CP
	interface)

Table 0/3: Product−specific terms and abbreviations

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Overview of components

Chapter 1

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1−1

1.

1.1

1. Overview of components

Contents

Overview of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1−1

Structure of the CPX terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1−3 1.1.1 Mode of operation of the CPX terminal . . . . . . . . . . . . . . . . . . . . . . 1−7 1.1.2 Structure of the electric CPX modules . . . . . . . . . . . . . . . . . . . . . . . 1−17 1.1.3 The power supply concept of the CPX terminal . . . . . . . . . . . . . . . . 1−19

1.2 Commissioning, diagnosis and operational functions . . . . . . . . . . . . . . . . . . 1−24

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1. Overview of components

1.1Structure of the CPX terminal

CPX terminals consist of electric and pneumatic modules for

controlling pneumatic actuators and low−current consuming

electric devices (further valves, bulbs, etc.). They are usually

placed decentrally directly on the machine or system.

Design variants

CPX terminals are available in plastic version (type CPX−...)

and in metal version (type CPX−M−...) with various different

functions. They can be fitted with different electric and pneu

matic modules (valves) in accordance with the customer’s

wishes. The equipment fitted on the CPX terminal in this man

ual may therefore differ from the equipment you are using.

2

1

1 Electric modules (electric side)	2 Pneumatic modules (pneumatic side);
	optional

Fig. 1/1: Structure of a CPX terminal with CPA pneumatics (example in plastic version)

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1. Overview of components

Fieldbus connection	CPX terminals with fieldbus connection permit communica
	tion with remotely−situated higher−order control systems.
	CPX terminals are constructed on a modular basis and can
	consist of the following modules, for example:
	Modules	Brief description
		CPX bus node for connecting to
		higher−order control systems via the
		fieldbus;
		Connections depend on the design of
		the CPX bus node
		CPX Front End Controller for control
		ling pneumatic and electric actua
		tors; communication via Ethernet
		(web server, e−mail, Modbus TCP,
		EasyIP etc.)
		CPX I/O modules for evaluating pro
		cess signals;
		Selectable connection technology
		(M12 connections here)
		CPX−CP interface for connecting de
		centrally arranged CP I/O modules
		and CP valve terminals (technology
		module)

Tab. 1/1: Electrical modules of a CPX terminal (examples in plastic version)

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1. Overview of components

Modules	Brief description
	Pneumatic interface for connecting
	the modular electrical peripherals of
	type 50 (CPX) to valve terminals of
	type 32 (MPA)
	Pneumatic interface for connecting
	the modular electrical peripherals of
	type 50 (CPX) to VTSA/ISO valves
	(type 44)

Pneumatic interface for connecting the modular electrical periphery type 50 (CPX) to valve terminals of type 03 (Midi/Maxi).

Pneumatic interface for connecting the modular electrical peripherals of type 50 (CPX) to valve terminals of type 12 (CPA)

Tab. 1/2: Pneumatic interface modules for CPX terminals

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1. Overview of components

Modules	Brief description
	MPA

VTSA

CPA

Tab. 1/3: Valve terminal pneumatics for CPX terminals

The electric and pneumatic side of the CPX terminal can be adapted to various requirements. The electric side can be fitted with various electric CPX modules, e.g. a CPX bus node, digital and analogue CPX I/O modules etc. (see Tab. 1/1).

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1. Overview of components

The pneumatic side can be fitted with pneumatics of type MPA, VTSA, Midi/Maxi or CPA (see Tab. 1/3). Different sizes of valves are possible here. Pneumatic modules are not abso lutely necessary. CPX terminals can consist exclusively of electric modules. If pneumatic modules are to be used, the pneumatic interface appropriate to the pneumatics in ques tion is required (see Tab. 1/2).

1.1.1Mode of operation of the CPX terminal

1Fieldbus incoming

2Fieldbus continuing

3Compressed air supply

4 Supply air (2/4)

5 CPX bus node

12

3

4

5

Fig. 1/2: Function overview of CPX terminal (here with MPA pneumatics)

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1. Overview of components

CPX bus node

The node point of a CPX terminal with fieldbus connection is the CPX bus node, which controls the following functions:

The connection of the terminal to the relevant field bus

The control of data transfer to/from the field bus module of your control system

Read and write access (depending on the CPX bus node) to system−relevant parameters and diagnostic data (access to internal data and parameters)

Internal control of the terminal

CPX bus nodes provide the connection to certain fieldbuses, pass control signals on to the other CPX modules and monitor their ability to function. Basic settings for fieldbus communi cation can usually be made by DIL switch directly on the CPX bus node.

Detailed information on the CPX bus node you are using can be found in the manual for the relevant CPX bus node.

CPX Front End Controller (CPX−FEC)

The CPX Front End Controller can be used together with a CPX bus node or independently of a CPX bus node. It offers the following functions, for example:

Independent control of the CPX valve terminal (Stand Alone)

Communication via Ethernet (e.g. web server, e−mail, EasyIP)

Ethernet slave function (via Modbus TCP)

Communication via fieldbus (only in conjunction with the appropriate CPX bus node)

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1. Overview of components

CPX I/O modules

Processing signals can be evaluated with the CPX I/O mod ules. Input modules provide inputs for connecting sensors and enable cylinder positions to be scanned, for example.

Output modules provide universally usable electric outputs for controlling low−current consuming devices (further valves, bulbs, etc.).

Note

Including the CPX bus node, a maximum of 10 electric CPX modules plus a pneumatic interface are permitted on the electric side.

The CPX I/O modules have various types of connections. The connections are on a sub−base which can be removed from the module. This offers the following advantages:

The CPX terminal can be fitted with the desired con nections. It can be adapted easily to various applica tions and operating conditions.

When servicing is required, the electronics of the I/O modules can be replaced without the need to dis mantle the CPX terminal, or to loosen individual con nections on the I/O modules.

The following types of connection can be used:

M12 connection, 5− or 8−pin

M8 connection, 3− or 4−pin

Terminal strips, 16−pin

Sub−D connection, 25−pin

HARAX connection, 4−pin

Further information on the CPX I/O modules can be found in the

manual •CPX I/O modules", type P. BE−CPX−EA−...

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1. Overview of components

CPX−CP interface

The CPX−CP interface serves for connecting decentrally ar ranged CP modules (CP valve terminals and CP I/O modules). It transmits control signals to the connected CP modules and monitors their ability to function. Maximum 128 external I/Os are possible per CPX−CP interface.

Detailed information on the CPX−CP interface can be found in

the manual for the CPX−CP interface type P. BE−CPX−CP−...

Pneumatic interface

If the CPX terminal is to be fitted with valves, a pneumatic interface will be required (see Tab. 1/2). The pneumatic inter face is the interface between the electric and pneumatic pe ripherals. It forms the mechanical connection between the pneumatic and electric modules and transmits the electric signals.

The CPX pneumatic interface is mounted on the right−hand side of the last electric module. Pneumatic interfaces can be used for e.g.:

Pneumatics of type MPA (maximum 128 solenoid coils)

Pneumatics of type VTSA (maximum 32 solenoid coils)

Pneumatics of type Midi/Maxi (maximum 26 solenoid coils)

Pneumatics of type CPA (maximum 22 solenoid coils)

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1. Overview of components

Pneumatic interface for		The pneumatic interface for MPA pneumatics provides the
MPA pneumatics		mechanical and electrical connection to the MPA pneumatic
		modules. Therefore, from the point of view of the CPX termi
		nal, the MPA pneumatic interface does not count as an elec
		tric module. Instead, the individual MPA pneumatic modules
		each represent an electric module with digital outputs for
		triggering the integrated valves.
Pneumatic interfaces for		From a technical point of view, the pneumatic interfaces
VTSA pneumatics,		for VTSA pneumatics, Midi/Maxi pneumatics or CPA pneu
Midi/Maxi pneumatics		matics represent electrical modules with a variable (configu
or CPA pneumatics		rable) number of digital outputs for activating the integrated
		valves.
		Detailed information on the CPX pneumatic interfaces and
		MPA pneumatic modules can be found in the manual for the
		CPX I/O modules of type P. BE−CPX−EA−...

Valve terminal pneumatics

The valve terminal pneumatics provide the following:Common channels for supply and exhaust air

Electric signals for all valve solenoid coils

Working lines 2 and 4 are provided for each valve position on the individual pneumatic modules. The valves are supplied with compressed air via the common channels or via special supply modules. Both the air and auxiliary pilot air from the valves are also exhausted via these common channels. Further modules for pressure supply are also available,

e.g. in order to permit work to be carried out with different work pressures.

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1. Overview of components

CPX terminals without pneumatics

CPX terminals without pneumatic modules possess an end plate instead of the pneumatic interface. This design provides digital and analogue inputs and outputs on the relevant fieldbus. A maximum of 10 electric modules (including the CPX bus node) are permitted on a CPX terminal.

1	CPX bus node	1	2
2	I/O modules
3	Right end plate
4	Left end plate

X 1

X 3

X 1

X 3

X 1

X 3

X 2

X 4

X 2

X 4

X 2

X 4

4

3

Fig. 1/3: CPX terminal as fieldbus I/O slave

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