WAGO 750-555 User guide

Fieldbus Independent
I/O Modules

4 AO DC 4-20 mA
750-555

Manual

Version 1.0.1

ii • General

Copyright © 2006 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.

WAGO Kontakttechnik GmbH & Co. KG

Hansastraße 27
D-32423 Minden

Phone: [phone] – 0
Fax: [phone] – 1 69

E-Mail: [e-mail]
Web: http://www.wago.com

Technical Support

Phone: [phone] – 5 55
Fax: [phone] – 85 55

E-Mail: [e-mail]

Every conceivable measure has been taken to ensure the correctness and com­pleteness of this documentation. However, as errors can never be fully ex­cluded, we would appreciate any information or ideas at any time.

E-Mail: [e-mail]
We wish to point out that the software and hardware terms as well as the

trademarks of companies used and/or mentioned in the present manual are
generally trademark or patent protected.

WAGO-I/O-SYSTEM 750
I/O Modules

Content • iii

Content

1 Important Comments ................................................................................. 4

1.1 Legal Principles........................................................................................4

1.1.1 Copyright............................................................................................. 4

1.1.2 Personnel Qualification .......................................................................4

1.1.3 Intended Use........................................................................................ 4

1.2 Symbols....................................................................................................5

1.3 Number Notation......................................................................................5

1.4 Safety Notes ............................................................................................. 6

1.5 Scope ........................................................................................................6

2 I/O Modules .................................................................................................7

2.1 Analog Output Modules ........................................................................... 7

2.1.1 750-555 [4 AO DC 4-20 mA].............................................................. 7

2.1.1.1 View................................................................................................7

2.1.1.2 Description......................................................................................7

2.1.1.3 Display Elements ............................................................................ 8

2.1.1.4 Schematic Diagram.........................................................................9

2.1.1.5 Technical Data .............................................................................. 10

2.1.1.6 Process Image ...............................................................................11

2.1.1.6.1 Standard Format....................................................................... 11

WAGO-I/O-SYSTEM 750
I/O Modules

4 • Copyright View

1 Important Comments

To ensure fast installation and start-up of the units described in this manual,
we strongly recommend that the following information and explanations are
carefully read and abided by.

1.1 Legal Principles

1.1.1 Copyright

This manual is copyrighted, together with all figures and illustrations
contained therein. Any use of this manual which infringes the copyright
provisions stipulated herein, is not permitted. Reproduction, translation and
electronic and photo-technical archiving and amendments require the written
consent of WAGO Kontakttechnik GmbH & Co. KG. Non-observance will
entail the right of claims for damages.

WAGO Kontakttechnik GmbH & Co. KG reserves the right to perform
modifications allowed by technical progress. In case of grant of a patent or
legal protection of utility patents all rights are reserved by WAGO
Kontakttechnik GmbH & Co. KG. Products of other manufacturers are always
named without referring to patent rights. The existence of such rights can
therefore not be ruled out.

1.1.2 Personnel Qualification

The use of the product detailed in this manual is exclusively geared to
specialists having qualifications in PLC programming, electrical specialists or
persons instructed by electrical specialists who are also familiar with the valid
standards. WAGO Kontakttechnik GmbH & Co. KG declines all liability
resulting from improper action and damage to WAGO products and third party
products due to non-observance of the information contained in this manual.

1.1.3 Intended Use

For each individual application, the components supplied are to work with a
dedicated hardware and software configuration. Modifications are only
permitted within the framework of the possibilities documented in the
manuals. All other changes to the hardware and/or software and the non­conforming use of the components entail the exclusion of liability on part of
WAGO Kontakttechnik GmbH & Co. KG.

Please direct any requirements pertaining to a modified and/or new hardware
or software configuration directly to WAGO Kontakttechnik GmbH & Co.
KG.

WAGO-I/O-SYSTEM 750
I/O Modules

Intended Use • 5
View

1.2 Symbols

Danger
Always abide by this information to protect persons from injury.

Warning
Always abide by this information to prevent damage to the device.

Attention
Marginal conditions must always be observed to ensure smooth operation.

ESD (Electrostatic Discharge)
Warning of damage to the components by electrostatic discharge. Observe
the precautionary measure for handling components at risk.

Note
Routines or advice for efficient use of the device and software optimization.

More information
References on additional literature, manuals, data sheets and INTERNET
pages

1.3 Number Notation

Number Code Example Note

Decimal 100 normal notation
Hexadecimal 0x64 C notation
Binary '100'

'0110.0100'

Within ',
Nibble separated with dots

WAGO-I/O-SYSTEM 750
I/O Modules

6 • Intended Use
View

1.4 Safety Notes

Warning
Switch off the system prior to working on bus modules!

In the event of deformed contacts, the module in question is to be replaced, as
its functionality can no longer be ensured on a long-term basis.

The components are not resistant against materials having seeping and
insulating properties. Belonging to this group of materials is: e.g. aerosols,
silicones, triglycerides (found in some hand creams).

If it cannot be ruled out that these materials appear in the component
environment, then additional measures are to be taken:

- installation of the components into an appropriate enclosure

- handling of the components only with clean tools and materials.

Attention
Cleaning of soiled contacts may only be done with ethyl alcohol and leather
cloths. Thereby, the ESD information is to be regarded.

1.5 Scope

Do not use any contact spray. The spray may impair the functioning of the
contact area.

The WAGO-I/O-SYSTEM 750 and its components are an open system. It
must only be assembled in housings, cabinets or in electrical operation
rooms. Access must only be given via a key or tool to authorized qualified
personnel.

The relevant valid and applicable standards and guidelines concerning the
installation of switch boxes are to be observed.

ESD (Electrostatic Discharge)
The modules are equipped with electronic components that may be destroyed
by electrostatic discharge. When handling the modules, ensure that the
environment (persons, workplace and packing) is well grounded. Avoid
touching conductive components, e.g. gold contacts.

This manual describes the Analog Output Module 750-555
4 AO DC 4-20 mA of the modular WAGO-I/O-SYSTEM 750.

Handling, assembly and start-up are described in the manual of the Fieldbus
Coupler. Therefore this documentation is valid only in the connection with the
appropriate manual.

WAGO-I/O-SYSTEM 750
I/O Modules

750-555 [4 AO DC 4-20 mA] • 7 View

2 I/O Modules

2.1 Analog Output Modules

2.1.1 750-555 [4 AO DC 4-20 mA]

4-Channel Analog Output Module 4 – 20 mA

2.1.1.1 View

13 14

Function

Error

A

C

B

D

A1

A2

Datacontacts

AO 1

0V 0V

AO 3

0V 0V

Fig. 2.1.1-1: View g055500e

2.1.1.2 Description

The analog output module 750-555 creates a standardized signal of 4 – 20
mA.

The module has four output channels and enables, for example, the direct
wiring of four 2-conductor actuators to the connections AO 1 and Common
(ground) or AO 2, AO 3, AO 4 and each with Common (ground). The signals
are transmitted via AO 1, AO 2, AO 3 or AO 4.
The channels have a common ground.

M

M

A3 A4

MM

750-555

AO 2

AO 4

Power jumper
contacts

Attention

All load impedances connected to the outputs of one I/O module have to be
either in the range of 0 ... 300 Ω or 300 ... 600 Ω.
The load impedances are checked by the I/O module and inadmissible load
combinations will cause an error message.

The input signal is electrically isolated and will be transmitted with a
resolution of 12 bits.

WAGO-I/O-SYSTEM 750
I/O Modules

8 • 750-555 [4 AO DC 4-20 mA]
Display Elements

The operational readiness and the trouble-free internal data bus
communication of the channels are indicated via a green function LED.
In addition, a red error LED will show if there are any broken wire or
inadmissible load combinations.

Any configuration of the output modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.

The field side supply voltage is used for the power supply of the module.

The field side supply voltage of 0 V and 24 V to downstream I/O modules is
derived from adjacent I/O modules or from a supply module. The supply
voltage for the field side is made automatically through the individual I/O
modules by means of power jumper contacts.

Warning

The maximum current of the internal power jumper contacts is 10 A. When
configuring the system it is important not to exceed the maximum/sum
current. However, if such a case should occur, another supply module must be
added.

The analog output module 750-555 can be used with all couplers/controllers
of the WAGO-I/O-SYSTEM 750 (except for the economy types 750-320, ­323,

-324 and -327).

2.1.1.3 Display Elements

13 14

A

A
B

Fig. 2.1.1-2: Display
elements

C

B

D

g055702x

LED Designation State Function

No operational readiness or the

off

internal data bus communication is

A
green

B
red

Function

Error

interrupted

Operational readiness and trouble-

on

free internal data bus
communication

off No Error

Broken wire or inadmissible load

on

combination

WAGO-I/O-SYSTEM 750
I/O Modules

750-555 [4 AO DC 4-20 mA] • 9
Schematic Diagram

2.1.1.4 Schematic Diagram

AO 1

0V

24V

AO 3

0V

1

2

AO 2

6

AO

0V

24V

10nF

3

7

AO 4

4

8

0V

10nF

AI

DU

Function

Logic

Error

5

0V

750-555

10nF

Fig. 2.1.1-3: Schematic diagram g055501e

WAGO-I/O-SYSTEM 750
I/O Modules

10 • 750-555 [4 AO DC 4-20 mA]
Technical Data

2.1.1.5 Technical Data

Module Specific Data

Number of outputs 4

Voltage supply via power jumper contacts

DC 24 V (-15% ... +20%)

Current consumption

Signal voltage 4 … 20 mA

Load impedance

Resolution 12 bit

Conversion time

Output filter settle time

Measuring error

Temperature coefficient

Isolation 500 V (Field / System)

Bit width 4 x 16 bits data

Dimensions W x H* x L
* from upper edge of 35 DIN rail

Weight ca. 55 g

Standards and Regulations (cf. Chapter 2.2 of the Coupler/Controller Manual)

EMC-Immunity to interference (CE) acc. to EN 50082-2 (96)

. (internal) 60 mA

typ

either 0 ... 300 Ω or 300 ... 600 Ω
(use same range of impedances for all loads!)

. 10 ms

typ

. 100 ms

typ

25°C

<± 0.1 % of the full scale value

<± 0.01 % /K of the full scale value

4 x 8 bits control / status (option)

12 mm x 64 mm x 100 mm

EMC-Emission of interference (CE) acc. to EN 50081-1 (93)

Approvals (cf. Chapter 2.2 of the Coupler/Controller Manual)

(UL508)

CULUS

ABS (American Bureau of Shipping)

BV (Bureau Veritas) (applied for)

GL (Germanischer Lloyd) (applied for) Cat. A, B, C, D

KR (Korean Register of Shipping)

LR (Lloyd's Register) (applied for) Env. 1, 2, 3, 4

NKK (Nippon Kaiji Kyokai)

(UL1604) Class I Div2 ABCD T4A

CULUS

KEMA II 3 G EEx nA II T4

Conformity Marking

WAGO-I/O-SYSTEM 750
I/O Modules

750-555 [4 AO DC 4-20 mA] • 11 Process Image

More Information
Detailed references to the approvals are listed in the document "Overview
Approvals WAGO-I/O-SYSTEM 750", which you can find on the CD ROM
ELECTRONICC Tools and Docs (Item-No.: 0888-0412)
or in the internet under:

www.wago.com ! Documentation ! WAGO-I/O-SYSTEM 750 !

System Description

2.1.1.6 Process Image

The analog output module 750-555 transmits 16-bit data and 8 status bits per
channel.

The digitalized output value is transmitted in a data word (16 bits) as output
byte 0 (low) and output byte 1 (high) via the process image of the coupler /
controller.
This value is represented with a 12 bit resolution on bit B3 ... B14.
The three least significant bits (B0 ... B2) are not parsed.

Some fieldbus systems can process the status information using by means of a
status byte.
However, processing of the status byte via the coupler / controller is optional,
which means that accessing or parsing the status information depends on the
fieldbus system.

2.1.1.6.1 Standard Format

For the standard module 750-555, the numerical values ranging from 0x0000
to 0x7FFF are scaled on the output current ranging from 4 mA to 20 mA.

current

4 – 20 mA output value

4 '0000.0000.0000.0000' 0x0000 0 0x00 off

8 '0001.1111.1111.1111' 0x1FFF 8191 0x00 off
12 '0011.1111.1111.1111' 0x3FFF 16383 0x00 off
16 '0101.1111.1111.1111' 0x5FFF 24575 0x00 off
20 '0111.1111.1111.1111' 0x7FFF 32767 0x00 off

Broken wire

or
inadmissible
load
combination

'XXXX.XXXX.XXXX.XXXX' 0xXXXX X 0x40 on

Process values of module 750-555

numerical value Output-

binary

hex. dec.

Status-

byte
hex.

Error-

LED

WAGO-I/O-SYSTEM 750
I/O Modules

WAGO Kontakttechnik GmbH & Co. KG
Postfach 2880 • D-32385 Minden
Hansastraße 27 • D-32423 Minden
Phone: [phone] – 0
Fax: [phone] – 1 69
E-Mail: [e-mail]

Internet: http://www.wago.com