WAGO SYSTEM 750 User Manual

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WAGO-I/O-SYSTEM 750

Manual

750-493(/xxx-xxx)

3-Phase Power Measurem

ent Module

Version 1.2.0

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2 WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

WAGO Kontakttechnik GmbH & Co. KG

Hansastraße 27 D-32423 Minden

Phone: +49 (0) 571/8 87 – 0 Fax: +49 (0) 571/8 87 – 1 69

E-Mail: info@wago.com

Web: http://www.wago.com

Technical Support

Phone: +49 (0) 571/8 87 – 5 55 Fax: +49 (0) 571/8 87 – 85 55

E-Mail: support@wago.com

Every conceivable measure has been taken to ensure the accuracy and completeness of this documentation. However, as errors can never be fully excluded, we always appreciate any information or suggestions for improving the documentation.

E-Mail: documentation@wago.com

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 protected by trademark or patent.

=== Ende der Lis te f ür T e xtmar ke E inb and _v orne = ==

WAGO-I/O-SYSTEM 750 Table of Contents 3 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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Table of Contents

1 Notes about this Documentation ................................................................. 6

1.1 Validity of this Documentation ................................................................. 6

1.2 Revision History ........................................................................................ 6

1.3 Copyright ................................................................................................... 7

1.4 Symbols ..................................................................................................... 8

1.5 Number Notation ..................................................................................... 10

1.6 Font Conventions .................................................................................... 10

2 Important Notes ......................................................................................... 11

2.1 Legal Bases ............................................................................................. 11

2.1.1 Subject to Changes ............................................................................. 11

2.1.2 Personnel Qualifications ..................................................................... 11

2.1.3 Use of the WAGO-I/O-SYSTEM 750 in Compliance with Underlying

Provisions ........................................................................................... 11

2.1.4 Technical Condition of Specified Devices ......................................... 12

2.2 Safety Advice (Precautions) .................................................................... 13

3 Device Description ..................................................................................... 15

3.1 View ........................................................................................................ 16

3.2 Connectors ............................................................................................... 17

3.2.1 Data Contacts/Internal Bus ................................................................. 17

3.2.2 Power Jumper Contacts/Field Supply ................................................ 17

3.2.3 CAGE CLAMP® Connectors ............................................................. 18

3.3 Display Elements .................................................................................... 19

3.4 Operating Elements ................................................................................. 19

3.5 Schematic Diagram ................................................................................. 20

3.6 Technical Data ........................................................................................ 21

3.6.1 Dimensions and Weight ..................................................................... 21

3.6.2 Voltage Supply ................................................................................... 21

3.6.3 Measuring Inputs ................................................................................ 21

3.6.4 Measuring Signal Processing ............................................................. 22

3.6.5 Internal Bus Communication .............................................................. 22

3.6.6 Connection Type ................................................................................ 22

3.6.7 Climatic Environmental Conditions ................................................... 23

3.7 Approvals ................................................................................................ 24

3.8 Standards and Guidelines ........................................................................ 25

4 Process Image ............................................................................................. 26

4.1 Input and Output Data ............................................................................. 26

4.2 Simple Process Image ............................................................................. 27

4.3 Flexible Process Image ........................................................................... 28

4.4 Control and Status Bytes ......................................................................... 29

5 Function Description ................................................................................. 35

5.1 Measuring Principle ................................................................................ 35

5.2 Measured Values and Measured Value Calculation ............................... 35

5.3 Representation of the Measured Values in the Process Image (PI) ........ 39

5.4 Measuring Errors and Accuracy .............................................................. 46

4 Table of Contents WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

6 Mounting ..................................................................................................... 47

6.1 Mounting Sequence ................................................................................. 47

6.2 Inserting and Removing Devices ............................................................ 48

6.2.1 Inserting the I/O Module .................................................................... 48

6.2.2 Removing the I/O Module .................................................................. 49

7 Connect Devices ......................................................................................... 50

7.1 Connecting a Conductor to the CAGE CLAMP® ................................... 50

7.2 Voltage Measurement ............................................................................. 51

7.3 Current Measurement .............................................................................. 52

7.3.1 Current Measurement on a Motor ...................................................... 52

7.3.2 Current Transformers ......................................................................... 53

7.3.2.1 Accuracy ........................................................................................ 53

7.3.2.2 Types of Current ............................................................................ 53

7.3.2.3 Overcurrent Limiting Factor FS .................................................... 53

7.3.2.4 Protection against Shock Hazard Voltages .................................... 54

7.3.3 Additional Measuring Instruments in the Current Path ...................... 55

7.4 Power Measurement ................................................................................ 56

7.4.1 Power Measurement on a Machine .................................................... 56

7.4.2 56

8 Commissioning ........................................................................................... 57

8.1 Configuration with WAGO-I/O-CHECK ............................................... 58

8.1.1 "Application" Tab ............................................................................... 61

8.1.2 "Phase L1”, “Phase L2”, “Phase L3” Tabs ........................................ 62

8.1.3 "I/O Module" Tab ............................................................................... 64

8.1.4 "Energy" Tab ...................................................................................... 65

8.1.5 "Factory Settings" Tab ....................................................................... 66

8.1.6 Register Assignment ........................................................................... 67

8.2 Displaying the Measured Values via WAGO-I/O-CHECK .................... 70

9 Diagnostics .................................................................................................. 77

10 Appendix ..................................................................................................... 78

10.1 CSV Data File “Snapshot” ...................................................................... 78

10.2 CSV Data File “Measurement Recording” ............................................. 80

11 Use in Hazardous Environments .............................................................. 81

11.1 Marking Configuration Examples ........................................................... 82

11.1.1 Marking for Europe According to ATEX and IEC-Ex ...................... 82

11.1.2 Marking for America According to NEC 500 .................................... 87

11.2 Installation Regulations ........................................................................... 88

11.2.1 Special Conditions for Safe Use (ATEX Certificate TÜV 07 ATEX

554086 X) ........................................................................................... 89

11.2.2 Special Conditions for Safe Use (ATEX Certificate TÜV 12 ATEX

106032 X) ........................................................................................... 90

11.2.3 Special Conditions for Safe Use (IEC-Ex Certificate TUN 09.0001 X)91

11.2.4 Special Conditions for Safe Use (IEC-Ex Certificate IECEx TUN

12.0039 X) .......................................................................................... 92

11.2.5 Special Conditions for Safe Use According to ANSI/ISA 12.12.01 .. 93

List of Figures ...................................................................................................... 94

WAGO-I/O-SYSTEM 750 Table of Contents 5 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

List of Tables ........................................................................................................ 95

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6 Notes about this Documentation WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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1 Notes about this Documentation

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Always retain this documentation!

This documentation is part of the product. Therefore, retain the documentation during the entire service life of the product. Pass on the documentation to any subsequent user. In addition, ensure that any supplement to this documentation is included, if necessary.

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1.1 Validity of this Documentation

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This documentation is only applicable to the I/O module 750-493 (3-Phase Power Measurement Module) and the variants listed in the table below.

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Table 1: Variants

Item Number

Description

750-493

3-Phase Power Measurement Module 1 A

750-493/000-001

3-Phase Power Measurement Module 5 A

750-493/025-000

3-Phase Power Measurement Module 1 A, Operating temperature -20 °C … +60 °C

750-493/025-001

3-Phase Power Measurement Module 5A, Operating temperature -20 °C … +60 °C

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Documentation Validity for Variants

Unless otherwise indicated, the information given in this documentation applies to listed variants.

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The I/O module 750-493 shall only be installed and operated according to the instructions in this manual and in the manual for the used fieldbus coupler/controller.

Consider power layout of the WAGO-I/O-SYSTEM 750!

In addition to these operating instructions, you will also need the manual for the used fieldbus coupler/controller, which can be downloaded at www.wago.com. There, you can obtain important information including information on electrical isolation, system power and supply specifications.

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1.2 Revision History

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WAGO-I/O-SYSTEM 750 Notes about this Documentation 7 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 2: Revision History

Document

Version

Device Version

Description of Change

Hardware

Software

1.0.1

‒

First issue

1.1.0

≥ 20

≥ 01

Total revision with new layout

1.2.0

≥ 20

≥ 01

Variants

750-493

/025-000 and

750-493

/025-

001 for extended temperature range added.

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1.3 Copyright

This Manual, including all figures and illustrations, is copyright-protected. Any further use of this Manual by third parties that violate pertinent copyright provisions is prohibited. Reproduction, translation, electronic and phototechnical filing/archiving (e.g., photocopying) as well as any amendments require the written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden, Germany. Non-observance will involve the right to assert damage claims.

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8 Notes about this Documentation WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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1.4 Symbols

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Personal Injury!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will result in death or serious injury.

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Personal Injury Caused by Electric Current!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will result in death or serious injury.

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Personal Injury!

Indicates a moderate-risk, potentially hazardous situation which, if not avoided, could result in death or serious injury.

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Personal Injury!

Indicates a low-risk, potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

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Damage to Property!

Indicates a potentially hazardous situation which, if not avoided, may result in damage to property.

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Damage to Property Caused by Electrostatic Discharge (ESD)!

Indicates a potentially hazardous situation which, if not avoided, may result in damage to property.

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Important Note!

Indicates a potential malfunction which, if not avoided, however, will not result in damage to property.

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WAGO-I/O-SYSTEM 750 Notes about this Documentation 9 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Additional Information:

Refers to additional information which is not an integral part of this documentation (e.g., the Internet).

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10 Notes about this Documentation WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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1.5 Number Notation

Table 3: Number Notation

Number Code

Example

Note

Decimal

100

Normal notation

Hexadecimal

0x64

C notation

Binary

'100' '0110.0100'

In quotation marks, nibble separated with dots (.)

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1.6 Font Conventions

Table 4: Font Conventions

Font Type

Indicates

italic

Names of paths and data files are marked in italic-type. e.g.: C:\Program Files\WAGO Software

Menu items are marked in bold letters. e.g.: Save

A greater-than sign between two names means the selection of a

menu item from a menu.

e.g.: File > New

Input

Designation of input or optional fields are marked in bold letters, e.g.: Start of measurement range

“Value”

Input or selective values are marked in inverted commas. e.g.: Enter the value “4 mA” under Start of measurement range.

[Button]

Pushbuttons in dialog boxes are marked with bold letters in square

brackets.

e.g.: [Input]

[Key]

Keys are marked with bold letters in square brackets. e.g.: [F5]

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WAGO-I/O-SYSTEM 750 Important Notes 11 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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2 Important Notes

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This section includes an overall summary of the most important safety requirements and notes that are mentioned in each individual section. To protect your health and prevent damage to devices as well, it is imperative to read and carefully follow the safety guidelines.

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2.1 Legal Bases

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2.1.1 Subject to Changes

WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any alterations or modifications that serve to increase the efficiency of technical progress. WAGO Kontakttechnik GmbH & Co. KG owns all rights arising from the granting of patents or from the legal protection of utility patents. Third-party products are always mentioned without any reference to patent rights. Thus, the existence of such rights cannot be excluded.

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2.1.2 Personnel Qualifications

All sequences implemented on WAGO-I/O-SYSTEM 750 devices may only be carried out by electrical specialists with sufficient knowledge in automation. The specialists must be familiar with the current norms and guidelines for the devices and automated environments.

All changes to the coupler or controller should always be carried out by qualified personnel with sufficient skills in PLC programming.

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2.1.3 Use of the WAGO-I/O-SYSTEM 750 in Compliance with Underlying Provisions

Fieldbus couplers, fieldbus controllers and I/O modules found in the modular WAGO-I/O-SYSTEM 750 receive digital and analog signals from sensors and transmit them to actuators or higher-level control systems. Using programmable controllers, the signals can also be (pre-) processed.

The devices have been developed for use in an environment that meets the IP20 protection class criteria. Protection against finger injury and solid impurities up to

12.5 mm diameter is assured; protection against water damage is not ensured. Unless otherwise specified, operation of the devices in wet and dusty environments is prohibited.

Operating the WAGO-I/O-SYSTEM 750 devices in home applications without further measures is only permitted if they meet the emission limits (emissions of interference) according to EN 61000-6-3. You will find the relevant information in the section “Device Description” > “Standards and Guidelines” in the manual for the used fieldbus coupler/controller.

12 Important Notes WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Appropriate housing (per 94/9/EG) is required when operating the WAGO-I/OSYSTEM 750 in hazardous environments. Please note that a prototype test certificate must be obtained that confirms the correct installation of the system in a housing or switch cabinet.

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2.1.4 Technical Condition of Specified Devices

The devices to be supplied ex works are equipped with hardware and software configurations, which meet the individual application requirements. WAGO Kontakttechnik GmbH & Co. KG will be exempted from any liability in case of changes in hardware or software as well as to non-compliant usage of devices.

Please send your request for modified and new hardware or software configurations directly to WAGO Kontakttechnik GmbH & Co. KG.

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WAGO-I/O-SYSTEM 750 Important Notes 13 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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2.2 Safety Advice (Precautions)

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For installing and operating purposes of the relevant device to your system the following safety precautions shall be observed:

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Install protection against electric shock!

All wiring for the measurement system shall be provided with protection against shock hazard voltages along with the corresponding safety signs!

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Do not work on devices while energized!

All power sources to the device shall be switched off prior to performing any installation, repair or maintenance work.

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Install the device only in appropriate housings, cabinets or in electrical operation rooms!

The WAGO-I/O-SYSTEM 750 and its components are an open system. As such, install the system and its components exclusively in appropriate housings, cabinets or in electrical operation rooms. Allow access to such equipment and fixtures to authorized, qualified staff only by means of specific keys or tools.

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Note the max. continuous measuring current of 1 A resp. 5 A!

The max. continuous measuring current of the module is 1 A resp. 5 A. If the used current transformers allow greater secondary currents than 1 A resp. 5 A install additional transformers with an appropriate transforming ratio!

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Replace defective or damaged devices!

Replace defective or damaged device/module (e.g., in the event of deformed contacts), since the long-term functionality of device/module involved can no longer be ensured.

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14 Important Notes WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Protect the components against materials having seeping and insulating properties!

The components are not resistant to materials having seeping and insulating properties such as: aerosols, silicones and triglycerides (found in some hand creams). If you cannot exclude that such materials will appear in the component environment, then install the components in an enclosure being resistant to the above-mentioned materials. Clean tools and materials are imperative for handling devices/modules.

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Clean only with permitted materials!

Clean soiled contacts using oil-free compressed air or with ethyl alcohol and leather cloths.

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Do not use any contact spray!

Do not use any contact spray. The spray may impair contact area functionality in connection with contamination.

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Do not reverse the polarity of connection lines!

Avoid reverse polarity of data and power supply lines, as this may damage the devices involved.

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Avoid electrostatic discharge!

The devices are equipped with electronic components that may be destroyed by electrostatic discharge when touched. Please observe the safety precautions against electrostatic discharge per DIN EN 61340-5-1/-3. When handling the devices, please ensure that environmental factors (personnel, work space and packaging) are properly grounded.

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WAGO-I/O-SYSTEM 750 Device Description 15 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3 Device Description

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The 3-phase power measurement module (also called I/O module) measures the electrical data in a 3-phase supply network. The voltages of the three phases are measured via network connection to L1, L2, L3 and N. The currents are fed to IL1, IL2, IL3 and IN via current transformers. The μC unit of the I/O module transmits the RMS (root mean square) values into the process image. Therefore, no high computing power is required from the controller. For each phase, the active power (P) and the energy consumption (W) are calculated by the I/O module using the root mean square values of all measured voltages (V) and currents (I). For example, both the apparent power (S) and phase shift angle (phi) can easily be derived from these values. Thus, the I/O module provides a comprehensive network analysis via the fieldbus. By means of values such as voltage, current, active and apparent power consumption or load condition, the operator can regulate the supply to a drive or machine in the best possible way and protect the installation from damage or failure.

The I/O modules 750-493 and 750-493/025-000 measure currents up to 1 A and the modules 750-493/000-001 and 750-493/025-001 measure up to 5 A.

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16 Device Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.1 View

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Figure 1: View

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Table 5: Legend for Figure “View”

Pos.

Description

Details See Section

Marking possibility with Mini-WSB

--2

Status LEDs

“Device Description” > “Display Elements”

Data contacts

“Device Description” > “Connectors”

CAGE CLAMP® connectors

“Device Description” > “Connectors”

Release tab

“Mounting” > ”Inserting and Removing Devices”

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WAGO-I/O-SYSTEM 750 Device Description 17 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.2 Connectors

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3.2.1 Data Contacts/Internal Bus

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Communication between the fieldbus coupler/controller and the I/O modules as well as the system supply of the I/O modules is carried out via the internal bus. It is comprised of 6 data contacts, which are available as self-cleaning gold spring contacts.

Figure 2: Data Contacts

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Do not place the I/O modules on the gold spring contacts!

Do not place the I/O modules on the gold spring contacts in order to avoid soiling or scratching!

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Ensure that the environment is well grounded!

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

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3.2.2 Power Jumper Contacts/Field Supply

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The I/O module 750-493 has no power jumper contacts.

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18 Device Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.2.3 CAGE CLAMP® Connectors

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8 CAGE CLAMP® connectors make up the measuring inputs. The 3-phase supply network and the loads are clamped here. See also section “Connect Devices“.

Two connectors each form the three measuring channels:

• L1 and IL1: voltage and current of phase L1

• L2 and IL2: voltage and current of phase L2

• L3 and IL3: voltage and current of phase L3

Figure 3: CAGE CLAMP

Connectors

Table 6: Legend for Figure “CAGE CLAMP® Connectors”

Channel

Designation

Connector

Function

Voltage L1

IL1

Current L1

Voltage L2

IL2

Current L2

Voltage L3

IL3

Current L3

−

N 4

Neutral wire for voltage measurement

IN 8

Neutral wire for current measurement

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WAGO-I/O-SYSTEM 750 Device Description 19 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.3 Display Elements

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8 LEDs A … H are used to indicate the operating status and possible errors. The meaning of these indications is listed in section „Diagnostics“.

Figure 4: LED-indicators

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3.4 Operating Elements

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The I/O module 750-493 has no operating elements.

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20 Device Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.5 Schematic Diagram

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Figure 5: Schematic Diagram

Function Earth FE!

In order to get a function earth, the connections N and IN are connected to the mounting rail via a 1 nF capacitor and a spring contact. If the rail is correctly connected to PE, the immunity to interference is increased.

WAGO-I/O-SYSTEM 750 Device Description 21 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.6 Technical Data

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3.6.1 Dimensions and Weight

Table 7: Technical Data ‒ Dimensions and Weight

Width

12 mm

Height (from upper edge of carrier rail)

64 mm

Length

100 mm

Weight

48 g

3.6.2 Voltage Supply

Table 8: Technical Data ‒ Voltage Supply

Voltage

System voltage DC 5 V (via internal bus)

Current consumption

100 mA

Category of overvoltage

III

Rated voltage impulse

4 kV

Degree of distortion

3.6.3 Measuring Inputs

Table 9: Technical Data ‒ Measuring Inputs

Number of inputs

6 (3 voltage inputs, 3 current inputs)

Rated measuring voltage max.

Input resistance typ.

Phase-to-phase voltage Lx - Ly:

480 VAC Phase voltage Lx - N: 277 VAC/DC

1072 kΩ

Measuring current max.

1 A for 750-493,

5 A for 750-493/000-001 1 A for 750-493,025-000

5 A for 750-493/025-001

Input resistance typ.

22 mΩ for 750-493,

5 mΩ for 750-493/000-001 22 mΩ for 750-493/025-000

5 mΩ for 750-493/025-001

Frequency range

- DC filter activated

- DC filter deactivated

10 … 2000 Hz

0 … 2000 Hz

Max. frequency

7.2 kHz

Signal form

any (in consideration of the frequency range and max. frequency)

22 Device Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

3.6.4 Measuring Signal Processing

Table 10: Technical Data ‒ Measuring Signal Processing

Measuring procedure

Calculation of true RMS for voltages

and currents, sample rate 8 kHz per

channel, resolution 24 bits

Measuring cycle time

Configurable for min. and max. values

Measuring error for current and voltage

For AC max. 0.5 %, for DC max. 1.0 % (of full-scale value)

Calculated values

Active power and energy, network frequency and cos phi

3.6.5 Internal Bus Communication

Table 11: Technical Data ‒ Internal Bus Communication

Bit width (internal bus)

Input and output data with 9 bytes each

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3.6.6 Connection Type

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Table 12: Technical Data – Data Contacts

Data contacts

Slide contact, hard gold plated, selfcleaning

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Table 13: Technical Data – Field Wiring

Wire connection

CAGE CLAMP®

Cross section

0.08 mm² … 2.5 mm², AWG 28 … 14

Stripped lengths

8 mm … 9 mm / 0.33 in

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WAGO-I/O-SYSTEM 750 Device Description 23 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

3.6.7 Climatic Environmental Conditions

Table 14: Technical Data – Climatic Environmental Conditions

Operating temperature range

0 °C … 55 °C

Operating temperature range for

components with extended

temperature range (750-xxx/025-xxx)

−20 °C … +60 °C

Storage temperature range

−25 °C … +85 °C

Storage temperature range for

components with extended

temperature range (750-xxx/025-xxx)

−40 °C … +85 °C

Relative humidity

Max. 5 % … 95 % without condensation

Resistance to harmful substances

Acc. to IEC 60068-2-42 and IEC 60068-2-43

Maximum pollutant concentration at

relative humidity < 75 %

SO2 ≤ 25 ppm H2S ≤ 10 ppm

Special conditions

Ensure that additional measures for

components are taken, which are used in an environment involving: – dust, caustic vapors or gases

– ionizing radiation

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24 Device Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.7 Approvals

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The following approvals have been granted to the basic version and all variants of 750-493 I/O modules:

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Conformity Marking

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CULUS

UL508

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The following approvals have been granted to the basic version of 750-493 I/O modules and the variation 750-493/000-001:

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Korea Certification MSIP-REM-W43-AIM750

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The following Ex approvals have been granted to the basic version and all variants of 750-493 I/O modules:

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TÜV 07 ATEX 554086 X

I M2 Ex d I Mb

II 3 G Ex nA IIC T4 Gc

II 3 D Ex tc IIIC T135°C Dc

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IECEx TUN 09.0001 X

Ex d I Mb

Ex nA IIC T4 Gc

Ex tc IIIC T135°C Dc

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CULUS

ANSI/ISA 12.12.01

Class I, Div2 ABCD T4

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WAGO-I/O-SYSTEM 750 Device Description 25 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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3.8 Standards and Guidelines

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750-493 I/O modules meet the following standards and guidelines:

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Explosive atmosphere EN 60079-0 Devices – General requirements

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Explosive atmosphere EN 60079-15 Equipment protection by type of protection "n"

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Explosive atmosphere EN 60079-31 Equipment dust ignition protection by enclosure "t"

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EMC CE-Immunity to interference acc. to EN 61000-6-2

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EMC CE-Emission of interference acc. to EN 61000-6-4

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26 Process Image WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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4 Process Image

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The 750-493 I/O module provides, on 3 logical channels, a maximum of 9 bytes input and 9 bytes output process data to a fieldbus coupler/controller. The data to be sent and received will be stored in up to 6 input and output bytes (D0 ... D5), i.e. in 3 data words. This means 3 process data are sent. 3 control bytes (C0 ... C2) and 3 status bytes (S0 … S2) are used for selecting process data and for setting parameters.

Notice that the process data image depends on the used fieldbus coupler/ controller!

Mapping the process data into the process image is specific for the fieldbus coupler/controller used. You will find both this information and the specific configuration of the relevant control/status bytes in the manual of the coupler/controller, section "Fieldbus Specific Configuration of Process Data" which describes the process image.

4.1 Input and Output Data

Table 15: Input and Output Data

9 Bytes Input Data

9 Bytes Output Data

Status byte 0

Control byte 0

Input data word 1 (LSB)

Output data word 1 (LSB)

Input data word 1 (MSB)

Output data word 1 (MSB)

Status byte 1

Control byte 1

Input data word 2 (LSB)

Output data word 2 (LSB)

Input data word 2 (MSB)

Output data word 2 (MSB)

Status byte 2

Control byte 2

Input data word 3 (LSB)

Output data word 3 (LSB)

Input data word 3 (MSB)

Output data word 3 (MSB)

WAGO-I/O-SYSTEM 750 Process Image 27 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

4.2 Simple Process Image

Each input data word in a simple process image is assigned to one channel and can only read measured values from this channel.

Table 16: Simple Process Image

Controlbyte

Input Data Word

Channel 1

Input data word 1

Channel 2

Input data word 2

Channel 3

Input data word 3

When entering a process data index into a control byte in the process data mode, the process data is returned in the associated process data word.

The process data indices are listed below in section “Control and Status Bytes”.

The channel index has no significance in the simple process image.

The simple process image is the default (factory) setting.

1st Example: Reading out the voltages (rms value) of phases L1, L2 and L3

Enter 0x01 (process data index = 1) into the control bytes C0, C1 and C2.

The voltage (rms value) of phase L1 is returned in process data word 1 (D0, D1), the voltage (rms value) of phase L2 is returned in process data word 2 (D2, D3) and the voltage (rms value) of phase L3 is returned in process data word 3 (D4, D5).

2nd Example: Reading out the voltage (rms value) of phase L1, the current (rms value) of phase L2 and the active power of phase L3

Enter 0x01 (channel index = 0, process data index = 1) into control byte C0, 0x00 (channel index = 0, process data index = 0) into control byte C1 and 0x02 (channel index = 0, process data index = 2) into control byte C2.

The voltage (rms value) of phase L1 is returned in input data word 1 (D0, D1), the current (rms value) of phase L2 is returned in input data word 2 (D2, D3) and the active power of phase L3 is returned in input data word 3 (D4, D5).

28 Process Image WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

4.3 Flexible Process Image

An input data word in a flexible process image can read measured values from any channel.

The flexible process image is enabled via WAGO-I/O-CHECK on the „Phase L1“, „Phase L2“ and „Phase L3“ tabs.

1st Example: Reading out the current (rms value), voltage (rms value) and active power of phase L2

Enter 0x10 (channel index 1, process data index 0) into control byte C0, 0x11 (channel index 1, process data index 1) into control byte C1 and 0x12 (channel index 1, process data index 2) into control byte C2.

The current (rms value) of phase L2 is returned in input data word 1 (D0, D1), the voltage (rms value) of phase L2 is returned in input data word 2 (D2, D3) and the active power of phase L2 is returned in input data word 3 (D4, D5).

2nd Example: Reading out the current (rms value) and voltage (rms value) of phase L1 and the voltage (rms value) of phase L2

Enter 0x00 (channel index 0, process data index 0) into control byte C0, 0x01 (channel index 0, process data index 1) into control byte C1 and 0x11 (channel index 1, process data index 1) into control byte C2.

The current (rms value) of phase L1 is returned in input data word 1 (D0, D1), the voltage (rms value) of phase L1 is returned in input data word 2 (D2, D3) and the voltage (rms value) of phase L2 is returned in input data word 3 (D4, D5).

WAGO-I/O-SYSTEM 750 Process Image 29 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

4.4 Control and Status Bytes

Table 17: Control Byte C0

Control Byte C0

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reg_Com

Reserved

Channel_ID

ProcDat_ID

ProcDat_

Here, enter the process data index for the physical variable you wish to read out using input data word 1.

Current (rms)

Voltage (rms)

Active power

Power factor

Active energy

Max. current

Max. voltage

Max. active power

Frequency

Min. current

10:

Min. voltage

11:

Min. active power

12 .... 15:

Reserved

Channel_

Simple

process

image

Always 0

(With the simple process image the channel index has no significance.)

Flexible

process image

Here, enter the channel index for the channel from which you wish to read out a measured value using input data word 1.

Channel 1

Channel 2

Channel 3

Calibration mode active

Reg_Com 0:

Process data communication

30 Process Image WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 18: Status Byte S0

Status Byte S0

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reg_Com

Err_L1

Channel_ID

ProcDat_ID

ProcDat_ ID

Process data index for the physical variable which was read out using input data word 1.

Channel_

Simple

process

image

Always 0

(With the simple process image the channel index has no significance.)

Flexible

process

image

Channel index for the channel from which a measured value was read

out using input data word 1

Err_L1

The voltage between L1 and N is greater than the set undervoltage threshold.

The voltage between L1 and N is less than the set undervoltage threshold. The LED „B“ lights up.

Reg_Com 0:

Process data communication

WAGO-I/O-SYSTEM 750 Process Image 31 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 19: Control Byte C1

Control Byte C1

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reg_Com

Reserved

Channel_ID

ProcDat_ID

ProcDat_

Here, enter the process data index for the physical variable you wish to read out using input data word 2.

Current (rms)

Voltage (rms)

Active power

Power factor

Active energy

Max. current

Max. voltage

Max. active power

Frequency

Min. current

10:

Min. voltage

11:

Min. active power

12 .... 15:

Reserved

Channel_

Simple

process

image

Always 0

(With the simple process image the channel index has no significance.)

Flexible

process image

Here, enter the channel index for the channel from which you wish to read out a measured value using input data word 2.

Channel 1

Channel 2

Channel 3

Calibration mode active

Reg_Com 0:

Process data communication

32 Process Image WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 20: Status Byte S1

Status Byte S1

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reg_Com

Err_L2

Channel_ID

ProcDat_ID

ProcDat_ ID

Process data index for the physical variable which was read out using input data word 2.

Channel_

Simple

process

image

Always 0

(With the simple process image the channel index has no significance.)

Flexible

process

image

Channel index for the channel from which a measured value was read

out using input data word 2

Err_L2

The voltage between L2 and N is greater than the set undervoltage threshold.

The voltage between L2 and N is less than the set undervoltage threshold. The LED „E“ lights up.

Reg_Com 0:

Process data communication

WAGO-I/O-SYSTEM 750 Process Image 33 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 21: Control Byte C2

Control Byte C2

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reg_Com

Reserved

Channel_ID

ProcDat_ID

ProcDat_

Here, enter the process data index for the physical variable you wish to read out using input data word 3.

Current (rms)

Voltage (rms)

Active power

Power factor

Active energy

Max. current

Max. voltage

Max. active power

Frequency

Min. current

10:

Min. voltage

11:

Min. active power

12 .... 15:

Reserved

Channel_

Simple

process

image

Always 0

(With the simple process image the channel index has no significance.)

Flexible

process image

Here, enter the channel index for the channel from which you wish to read out a measured value using input data word 3.

Channel 1

Channel 2

Channel 3

Calibration mode active

Reg_Com 0:

Process data communication

34 Process Image WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 22: Status Byte S2

Status Byte S2

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reg_Com

Err_L3

Channel_ID

ProcDat_ID

ProcDat_ ID

Process data index for the physical variable which was read out using input data word 3.

Channel_

Simple

process

image

Always 0

(With the simple process image the channel index has no significance.)

Flexible

process

image

Channel index for the channel from which a measured value was read

out using input data word 3

Err_L3

The voltage between L3 and N is greater than the set undervoltage threshold.

The voltage between L3 and N is less than the set undervoltage threshold. The LED „F“ lights up.

Reg_Com 0:

Process data communication

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WAGO-I/O-SYSTEM 750 Function Description 35 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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5 Function Description

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5.1 Measuring Principle

The 3-phase power measurement module operates using 6 analog/digital converters for acquiring the current and voltage levels in all three phases. The 3 phases are connected to the current measuring channels of the I/O module in "single-ended" measurement topology. Each of the 6 measurement inputs is scanned at a frequency of 8 kHz. The input filters on the measuring channels have a limit frequency of 7.2 kHz. The analog measured values are quantized with 24 bits and further processed digitally. Acquisition and processing of the measured values of all three phases is performed simultaneously in the very same way.

5.2 Measured Values and Measured Value Calculation

The 3-phase power measurement module makes the following AC measured values available per phase (Lx = L1, L2 or L3):

Voltage:

• RMS value voltage Lx – N

• Maximum RMS value voltage Lx – N

• Minimum RMS value voltage Lx – N

Current:

• RMS value current Lx

• Maximum RMS value current Lx

• Minimum RMS value current Lx

Power:

• Active power Lx

• Maximum value active power Lx

• Minimum value active power Lx

Energy:

• Active energy Lx

Frequency:

• Supply network frequency Lx

Power factor:

• cos phi Lx

Limit value:

• Undervoltage Lx: Threshold value undershot

Alternatively, the following DC measured values are available if DC measurement has been activated in the I/O module. See section "Commissioning" > "Configuration with WAGO-I/O-CHECK".

Voltage:

• DC voltage Lx – N

Current:

• DC current Lx

Power:

• Power (DC current) Lx

36 Function Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Calculating the RMS Values for Current and Voltage

The I/O module measures the true RMS of the voltages and currents applied to the measurement inputs per period. See figure below.

∑

N-1

eff

∑

N-1

eff

ik:

Scan value of the current

eff

RMS value of the current

uk:

Scan value of the voltage

eff

RMS value of the voltage

No. of scan values

Figure 6: RMS Value Calculation (Example, Not to Scale)

In a 50-Hz-supply network, the RMS value can be read with the specified measuring accuracy with every second period via the process image. Therefore, the default setting of the measuring cycle time is 39 ms.

For applications where voltage and current drops have to be evened out, a mean of the RMS values for current and voltage can be generated by the measuring cycle time setting. If a time of 40 ms is set in WAGO-I/O-CHECK, there is averaging of 2 RMS values, a value of 500 ms is set, there is averaging of 13 RMS values (500/39 = 12.82).

The maximum measuring cycle time can be 24375 ms. The update rate in the process image corresponds to the time set.

WAGO-I/O-SYSTEM 750 Function Description 37 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Calculating Power and Energy

The individual time-synchronous scan values for currents and voltages are used to calculate active power (P). Phase shifts between currents and voltages are taken into account when calculating power. The time integration of power yields the energy per phase.

Determining the Frequency

Phase frequencies are determined by zero-crossing detection of the scanned signals.

Calculating the Power Factor cos phi

The power factor cos phi is calculated from the phase shift between current and voltage of the fundamental wave of the respective phase.

The I/O module can be configured, so that the cos phi is output with or without sign (see section "Commissioning" > "Configuration with WAGO-I/O-CHECK"). If a sign is put out, it is not the information acquisition (+) or delivery (-) of active power (P), but a statement on the load on the network:

• A positive (+) sign of the cos phi means inductive load

• A negative (-) sign of the cos phi means capacitive load

Together with the sign of the active power, you can determine the quadrants in the 4-quadrant display for an AC network:

Figure 7: 4-Quadrant Display of Active and Reactive Power

38 Function Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Apparent Power and Reactive Power

Not all loads are purely resistive in real supply networks. Phase shifting therefore occurs between the current and the voltage. However, this does not affect the method for determining the RMS values for current and voltage previously described. They can both be obtained as measured values from the I/O module.

The apparent power (S) can be calculated from these measured values using the following equation:

S = U · I

The reactive power (Q) can then be calculated using the following equation:

Q −=

WAGO-I/O-SYSTEM 750 Function Description 39 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

5.3 Representation of the Measured Values in the Process Image (PI)

The I/O module records and calculates numerous measured values. Up to 3 measured values can be represented in the process image (PI). The selection of these ones is made with the process data indices in control bytes C0, C1 and C2 in the output data. The following table lists the available measured values:

Table

23: Measured Values in the Process Image (PI)

Measured Value

Data

Type

Scaling Factor PI

750-493

750-493/

025-000

(1A)

750-493/000

-001

750-493/025

-001

(5A)

Voltage

RMS value voltage L1 - N UInt16 0.1V / LSB 0.1V / LSB

RMS value voltage L2 - N

UInt16

0.1V / LSB

RMS value voltage L3 - N UInt16 0.1V / LSB 0.1V / LSB

Maximum RMS value voltage L1 - N

UInt16

0.1V / LSB

Maximum RMS value voltage L2 - N UInt16 0.1V / LSB 0.1V / LSB

Maximum RMS value voltage L3 - N

UInt16

0.1V / LSB

Minimum RMS value voltage L1 - N UInt16 0.1V / LSB 0.1V / LSB

Minimum RMS value voltage L2 - N

UInt16

0.1V / LSB

Minimum RMS value voltage L3 - N UInt16 0.1V / LSB 0.1V / LSB

Current

RMS value current L1 UInt16 0.001A / LSB 0.005A / LSB RMS value current L2 UInt16 0.001A / LSB 0.005A / LSB RMS value current L3 UInt16 0.001A / LSB 0.005A / LSB Maximum RMS value current L1 UInt16 0.001A / LSB 0.005A / LSB Maximum RMS value current L2 UInt16 0.001A / LSB 0.005A / LSB Maximum RMS value current L3 UInt16 0.001A / LSB 0.005A / LSB Minimum RMS value current L1 UInt16 0.001A / LSB 0.005A / LSB Minimum RMS value current L2 UInt16 0.001A / LSB 0.005A / LSB Minimum RMS value current L3 UInt16 0.001A / LSB 0.005A / LSB

Power

Active power L1

Int16

0.1W / LSB

0.5W / LSB

Active power L2 Int16 0.1W / LSB 0.5W / LSB

Active power L3

Int16

0.1W / LSB

0.5W / LSB

Maximum value active power L1 Int16 0.1W / LSB 0.5W / LSB

Maximum value active power L2

Int16

0.1W / LSB

0.5W / LSB

Maximum value active power L3 Int16 0.1W / LSB 0.5W / LSB

Minimum value active power L1

Int16

0.1W / LSB

0.5W / LSB

40 Function Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Minimum value active power L2 Int16 0.1W / LSB 0.5W / LSB Minimum value active power L3 Int16 0.1W / LSB 0.5W / LSB

Energy

Active energy L1 UInt16

Setup with WAGO-I/O-CHECK

or in Register 35

Active energy L2 UInt16

Setup with WAGO-I/O-CHECK

or in Register 35

Active energy L3 UInt16

Setup with WAGO-I/O-CHECK

or in Register 35

Frequency

Supply network frequency L1 UInt16 0.1Hz / LSB 0.1Hz / LSB Supply network frequency L2 UInt16 0.1Hz / LSB 0.1Hz / LSB Supply network frequency L3 UInt16 0.1Hz / LSB 0.1Hz / LSB

Power factor

cos phi L1

Int16

0.01

cos phi L2 Int16 0.01 0.01

cos phi L3

Int16

0.01

DC measured values

DC voltage L1 - N UInt16 0.1V / LSB 0.1V / LSB DC voltage L2 - N UInt16 0.1V / LSB 0.1V / LSB DC voltage L3 - N UInt16 0.1V / LSB 0.1V / LSB DC current L1 UInt16 0.001A / LSB 0.005A / LSB DC current L2 UInt16 0.001A / LSB 0.005A / LSB DC current L3 UInt16 0.001A / LSB 0.005A / LSB

Power (DC current) L1

Int16

0.1W / LSB

0.5W / LSB

Power (DC current) L2 Int16 0.1W / LSB 0.5W / LSB

Power (DC current) L3

Int16

0.1W / LSB

0.5W / LSB

The format of the measured values with sign (Int16) is the two's complement. Generally, use the following equation to calculate the measured values from the process values: Measured value = Process value x Scaling factor PI

Examples of Calculating the Measured Values

Voltage

750-493

750-493/000-001

Process value

0x07D0 (2000)

0x074A (1866)

Scaling factor PI

0.1 V / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

200.0 V

186.6 V

Frequency

750-493

750-493/000-001

Process value

0x01F5 (501)

0x0257 (599)

Scaling factor PI

0.1 Hz / LSB

Equation

Measured value = Process value x Scaling factor PI

WAGO-I/O-SYSTEM 750 Function Description 41 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Measured value

50.1 Hz

59.9 Hz

cos phi

750-493

750-493/000-001

Process value

0xFFB2 (-78)

0x0059 (89)

Scaling factor PI

0.01 / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

-0.78

0.89

When calculating current-dependent values, the current transformer ratio

(CTR) must be taken into account when using a current transformer.

Current transformers

Current transformers are available on the market in different designs. On the primary side, currents of 20 A, 25 A, 30 A, 35 A, 40 A, 45 A, 50 A, 75 A, 100 A … 5000 A are supported, on the secondary side 1 A or 5 A.

For example, transformation ratios of 45:1 A (750-493) or 200:5 A (750-493/000-

001) are possible. Thus, the corresponding current transformer ratios (CTR) are 1:45 and 1:40.

The I/O module allows you to set user scaling using WAGO-I/O-CHECK or via Register 32, bit 0. If the bit is set to 0, user scaling is disabled (off) and the transformation ratio of the current is 1:1. If the bit is set to 1, user scaling is enabled (on) and the transformation ratio is already taken into account in the I/O module. The transformation ratio is set using WAGO-I/O-CHECK or in Register 37. The divisor of the CTR (D-CTR) is set in the register, i.e. according to the examples above:

• 1A variants:

CTR = 1:45,

D-CTR = 45

=> Register 37

• 5A variants:

CTR = 1:40,

D-CTR = 40

=> Register 37

In the I/O module, the RMS values of the currents are represented in the process image according to the table "Measured values in the process image (PI)" above as UInt16 with the following scaling:

• 1A variants:

0.001 A / LSB

• 5A variants:

0.005 A / LSB

Only the following maximum currents can be represented in the process image and thus only the corresponding maximum CRT values can be supported:

1A variants:

0 ... 65535 at 1 mA/LSB => 0.000 ... 65.535 A and thus: D-CTR max. = 50, transformation ratios max. = 50:1 A

5A variants:

0 ... 65535 at 5 mA/LSB => 0.000 ... 327.675 A and thus: D-CTR max. = 50, transformation ratios max. = 250:5 A

42 Function Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

The decisive factor is the maximum representable current value in the process image.

If the transformation ratio is 500:1 A, for example, the resulting D-CTR of 500 cannot be taken into account in the I/O module 750-493 (1A) directly via active user scaling, likewise a D-CTR of 100 at a transformation ratio of 500:5 A in 750-493/000-001 (5A).

Therefore, the following setting options and calculations for the measured values result in the process image for the current-dependent variables:

A. User Scaling OFF, Measurement without Current Transformer

Current

750-493

750-493/000-001

0 0 Register 37 (D-CTR)

0x0001 (1)

Process value

0x01A9 (425)

0x033D (829)

Scaling factor PI

0.001 A / LSB

0.005 A / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

0.425 A

4.145 A

Active Power

750-493

750-493/000-001

0 0 Register 37 (D-CTR)

0x0001 (1)

Process value

0x03D2 (978)

0x0776 (1910)

Scaling factor PI

0.1 W / LSB

0.5 W / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

97.8 W

955.0 W

Active Energy

750-493

750-493/000-001

0 0 Register 37 (D-CTR)

0x0001 (1)

1 3 Process value

0x22ED (8941)

0 x 1126(4390)

Scaling factor PI

0.01 Wh / LSB

5 Wh / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

89.41 Wh

21950 Wh

* Register 35: Setting in the register defines the scaling factor PI for energy values

WAGO-I/O-SYSTEM 750 Function Description 43 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

B. User Scaling ON, Measurement with Current Transformer

Current

750-493

750-493/000-001

1 1 Register 37 (D-CTR)

0x002D (45)

0x0028 (40)

Process value

0x96A1 (38561)

0x60FB (24827)

Scaling factor PI

0.001 A / LSB

0.005 A / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

38.561 A

124.135 A

Active Power

750-493

750-493/000-001

1 1 Register 37 (D-CTR)

0x002D (45)

0x0028 (40)

Process value

0x22A5 (8869)

0x1648 (5704)

Scaling factor PI

0.1 W / LSB

0.5 W / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

886.9 W

2852.0 W

Active Energy

750-493

750-493/000-001

1 1 Register 37 (D-CTR)

0x002D (45)

0x0028 (40)

2 4 Process value

0x0D86 (3462)

0x2CA3 (11427)

Scaling factor PI

0.1 Wh / LSB

50 Wh / LSB

Equation

Measured value = Process value x Scaling factor PI

Measured value

346.2 Wh

571350 Wh

* Register 35: Setting in the register defines the scaling factor PI for energy values

C. User Scaling OFF, Measurement with Current Transformer 500:1 A

(1A Variants) and 500:5 A (5A Variants)

D-CTR values of 500 or 100 must be taken into account externally when user scaling is OFF, i.e. the transferred measured value must be multiplied by 500 or 100 in the high-level PLC.

Current

750-493

750-493/000-001

0 0 Register 37 (D-CTR)

0x0001 (1)

Process value

0x01A9 (425)

0x033D (829)

Scaling factor PI

0.001 A / LSB

0.005 A / LSB

Equation

Measured value = Process value x Scaling factor PI x D-CTR

Measured value

212.5 A

414.5 A

Note: Resolution of the current values in 500mA steps

44 Function Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Active Power

750-493

750-493/000-001

0 0 Register 37 (D-CTR)

0x0001 (1)

Process value

0x03D2 (978)

0x0776 (1910)

Scaling factor PI

0.1 W / LSB

0.5 W / LSB

Equation

Measured value = Process value x Scaling factor PI x D-CTR

Measured value

48900 W

95500 W

Active Energy

750-493

750-493/000-001

0 0 Register 37 (D-CTR)

0x0001 (1)

1 3 Process value

0x22ED (8941)

0 x 1126 (4390)

Scaling factor PI

0.01 Wh / LSB

5 Wh / LSB

Equation

Measured value = Process value x Scaling factor PI x D-CTR

Measured value

44705 Wh

2195000 Wh

* Register 35: Setting in the register defines the scaling factor PI for energy values

D. User Scaling ON, Measurement with Current Transformer 500:1 A

(1A Variants) and 500:5 A (5A Variants)

In this example, the D-CTR is divided into two parts: D-CTR1 is programmed in the I/O module and taken into account with the process value, the other one D-CTR 2 must be taken into account externally, in the high-level PLC, when calculating the measured value:

500:1 A => D-CTR = 500 - D-CTR1 = 50, D-CTR2 = 10 500:5 A => D-CTR = 100 - D-CTR1 = 50, D-CTR2 = 2

Due to the high internal resolution of the current measurement in the I/O module, the process values are available with mA resolution. The resolution and data type of other measured values must be observed, so that the measured values do not exceed the range limits (e.g. for the measured power values).

Current

750-493

750-493/000-001

1 1 Register 37 (D-CTR1)

0x0032 (50)

Process value

0xA6AF (42671)

0x2103 (8451)

Scaling factor PI

0.001 A / LSB

0.005 A / LSB

Equation

Measured value = Process value x Scaling factor PI x D-CTR2

Measured value

426.71 A

84.51 A

Note: Resolution of the current values in 10mA steps

WAGO-I/O-SYSTEM 750 Function Description 45 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Active Power

750-493

750-493/000-001

1 1 Register 37 (D-CTR1)

0x0032 (50)

Process value

0x5486 (21638)

0xFFFF (65535)

Scaling factor PI

0.1 W / LSB

0.5 W / LSB

Equation

Measured value = Process value x Scaling factor PI x D-CTR2

Measured value

21638 W

65535 W

Active Energy

750-493

750-493/000-001

1 1 Register 37 (D-CTR1)

0x0032 (50)

4 5 Process value

0x2CFD (11517)

0x0593 (1427)

Scaling factor PI

10 Wh / LSB

500 Wh / LSB

Equation

Measured value = Process value x Scaling factor PI x D-CTR2

Measured value

1151700 Wh

1427000 Wh

* Register 35: Setting in the register defines the scaling factor PI for energy values

46 Function Description WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

5.4 Measuring Errors and Accuracy

The measuring errors of the I/O module are specified in the table below. The values already take into account the errors caused by the connection method (single-ended 0.1%) and the calibration tolerance (0.1%). They apply to the entire temperature range of 0 to 55 °C and to frequencies of 45 to 65 Hz. Outside this frequency range, the error is max. 2%.

Table 24: AC Measuring Errors

AC Measuring Errors

750-493, 750-493/025-000, 750493/000-001 and 750-493/025-001

Voltage

<= 0.3% of full-scale value

Current

<= 0.5% of full-scale value

Active power

<= 0.5%

Frequency

0.01 Hz

The measuring accuracy of the I/O module falls when an RMS voltage falls below 45 V. This state is called ZC limit and is displayed via the "D" LED (SAG LED). The following conditions can also degrade the measuring accuracy of the I/O module:

1. If only one or two phases of the three-phase supply network are connected,

higher measuring errors can occur in the voltage measurement (+0.1%).

2. In AC networks only:

If all phases fall below the ZC limit, accurate measurement of phase angle, frequency and current are no longer possible. The measuring accuracy of all current-depending variables (current, power, energy) falls off by 0.4%.

3. Near the ZC limit, the accuracy of the phase angle measurement decreases

to a value of ± 1.5 °.

4. If a current measuring input operates near no-load, higher measuring errors

can occur for this measuring path. Therefore, the measured current should be min. 75 mA for 750-493 resp. 100 mA for 750-493/000-001.

For DC measurements, the error is <= 1% of the full-scale value for current, voltage and power.

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WAGO-I/O-SYSTEM 750 Mounting 47 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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6 Mounting

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6.1 Mounting Sequence

Fieldbus couplers/controllers and I/O modules of the WAGO-I/O-SYSTEM 750/753 are snapped directly on a carrier rail in accordance with the European standard EN 50022 (DIN 35).

The reliable positioning and connection is made using a tongue and groove system. Due to the automatic locking, the individual devices are securely seated on the rail after installation.

Starting with the fieldbus coupler/controller, the I/O modules are mounted adjacent to each other according to the project design. Errors in the design of the node in terms of the potential groups (connection via the power contacts) are recognized, as the I/O modules with power contacts (blade contacts) cannot be linked to I/O modules with fewer power contacts.

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Risk of injury due to sharp-edged blade contacts!

The blade contacts are sharp-edged. Handle the I/O module carefully to prevent injury.

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Insert I/O modules only from the proper direction!

All I/O modules feature grooves for power jumper contacts on the right side. For some I/O modules, the grooves are closed on the top. Therefore, I/O modules featuring a power jumper contact on the left side cannot be snapped from the top. This mechanical coding helps to avoid configuration errors, which may destroy the I/O modules. Therefore, insert I/O modules only from the right and from the top.

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Don't forget the bus end module!

Always plug a bus end module 750-600 onto the end of the fieldbus node! You must always use a bus end module at all fieldbus nodes with WAGO-I/OSYSTEM 750 fieldbus couplers/controllers to guarantee proper data transfer.

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48 Mounting WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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6.2 Inserting and Removing Devices

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Perform work on devices only if they are de-energized!

Working on energized devices can damage them. Therefore, turn off the power supply before working on the devices.

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6.2.1 Inserting the I/O Module

1. Position the I/O module so that the tongue and groove joints to the fieldbus

coupler/controller or to the previous or possibly subsequent I/O module are engaged.

Figure 8: Insert I/O Module (Example)

2. Press the I/O module into the assembly until the I/O module snaps into the

carrier rail.

Figure 9: Snap the I/O Module into Place (Example)

With the I/O module snapped in place, the electrical connections for the data contacts and power jumper contacts (if any) to the fieldbus coupler/controller or to the previous or possibly subsequent I/O module are established.

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WAGO-I/O-SYSTEM 750 Mounting 49 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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6.2.2 Removing the I/O Module

1. Remove the I/O module from the assembly by pulling the release tab.

Figure 10: Removing the I/O Module (Example)

Electrical connections for data or power jumper contacts are disconnected when removing the I/O module.

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50 Connect Devices WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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7 Connect Devices

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7.1 Connecting a Conductor to the CAGE CLAMP®

The WAGO CAGE CLAMP® connection is appropriate for solid, stranded and finely stranded conductors.

Only connect one conductor to each CAGE CLAMP®!

Only one conductor may be connected to each CAGE CLAMP®. Do not connect more than one conductor at one single connection!

If more than one conductor must be routed to one connection, these must be connected in an up-circuit wiring assembly, for example using WAGO feedthrough terminals.

Exception:

If it is unavoidable to jointly connect 2 conductors, then you must use a ferrule to join the wires together. The following ferrules can be used: Length: 8 mm Nominal cross section

max.

: 1 mm2 for 2 conductors with 0.5 mm2 each

WAGO product: 216-103 or products with comparable properties

1. For opening the CAGE CLAMP® insert the actuating tool into the opening

above the connection.

2. Insert the conductor into the corresponding connection opening.

3. For closing the CAGE CLAMP® simply remove the tool. The conductor is

now clamped firmly in place.

Figure 11: Connecting a Conductor to a CAGE CLAMP

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WAGO-I/O-SYSTEM 750 Connect Devices 51 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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7.2 Voltage Measurement

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In order to measure the 3 phase voltages of a supply network, connect its 4 wires with the CAGE CLAMPS® L1, L2, L3 and N.

Figure 12: Voltage Measurement

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52 Connect Devices WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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7.3 Current Measurement

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7.3.1 Current Measurement on a Motor

For measuring the currents of a 3 phase electrical motor connect it with the CAGE CLAMPS® IL1, IL2, IL3 and IN via current transformers.

Connect CAGE CLAMP® N to earth, if not connected to the neutral wire!

If you do not connect the CAGE CLAMP® N with the neutral wire of the supply network (e.g. using the module for pure current measurement) you must connect N to earth PE to avoid hazardous voltages in the event of faults!

Figure 13: Current Measurement on a Motor

WAGO-I/O-SYSTEM 750 Connect Devices 53 750-493 3-Phase Power Measurement Module

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7.3.2 Current Transformers

For measuring currents greater than 1 A resp. 5 A you have to use external current transformers. Normally, the selection of the current transformers is not a critical factor. The internal resistance in the current path of the 3-phase power measurement module is so low that it can be neglected when considering the overall resistance of the current loop. The transformers must provide a rated secondary current of 1 A resp. 5 A. The rated primary current Ipn shall be equal or higher than the currents to be measured. The normal, permissible overload level of 1.2 x Ipn presents no problem for the 3-phase power measurement module, but can, however, lead to minor measurement inaccuracies.

Do not operate with open load!

Please note that current transformers from some manufacturers shall not be operated with an open output circuit! Connect the I/O module to the current transformers’ secondary windings before commissioning the current transformers!

7.3.2.1 Accuracy

Please note that the overall accuracy of the measuring setup consisting of the 3-phase power measurement modules and the current transformers essentially depends on the transformers’ accuracy category.

Do not use transformers of class 0.5 for accounting purposes!

A measuring system with a class 0.5 current transformer cannot be approved or certified for accounting purposes as the 3-phase power measurement module is not an approved utility billing meter as defined in the standard for electricity meters (DIN 43 586).

7.3.2.2 Types of Current

The 3-phase power measurement module can measure any types of current up to a frequency of 2 kHz. As currents are frequently generated by power inverters and can contain frequencies lower than 50 Hz or even a DC portion, an electronic transformer should be used for these applications.

7.3.2.3 Overcurrent Limiting Factor FS

The overcurrent limiting factor (FS) for current transformers indicates at which multiple of its rated primary current saturation occurs which protects the

54 Connect Devices WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

connected measuring instruments. FS shall be max. 10 for the 1 A module resp. max. 5 for the 5 A module.

Note the max. continuous measuring current of 1 A resp. 5 A!

The max. continuous measuring current of the module is 1 A resp. 5 A. If the used transformers allow greater secondary currents than 1 A resp. 5 A install additional transformers with an appropriate transforming ratio!

7.3.2.4 Protection against Shock Hazard Voltages

No hazardous voltage is produced when the 3-phase power measurement module is used as specified, with appropriate current transformers. Secondary voltage is only a few Volts. Nevertheless, the following faults can result in high voltage levels:

• Open current path for one or more transformers

• Disconnected/cut N conductor at the voltage measuring end of the 3-phase

power measurement module

• General insulation faults

Install protection against electric shock!

All wiring for the measurement system shall be equipped with protection against shock hazard voltages along with the corresponding safety signs!

The 3-phase power measurement module permits a maximum voltage of 480 V for normal operating conditions. The voltages at the voltage inputs shall not exceed 480 V. For higher voltages use a transformer stage. This one however, shall not produce a phase angle shift (Yy0)!

The 3-phase power measurement module is equipped with a protective impedance of 1072 kΩ at the voltage measurement end. If the N conductor is not connected, and only one of the three voltage measuring terminals is under power, a voltage of 230 VAC to ground is yielded in a 3-phase system with a phase-to-phase voltage of 400 VAC. This voltage is also present at the current measuring end and can be measured using a multimeter with 10 MΩ input resistance. This does not represent an insulation fault.

WAGO-I/O-SYSTEM 750 Connect Devices 55 750-493 3-Phase Power Measurement Module

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7.3.3 Additional Measuring Instruments in the Current Path

Please note that adding measuring instruments (such as ammeters) in the current path can substantially increase the total apparent power. In addition, the CAGE CLAMP® IN of the I/O module must form a star point (neutral) for the three secondary windings. See figure above. Therefore, additional measuring instruments must be potential-free and wired accordingly.

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56 Connect Devices WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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7.4 Power Measurement

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7.4.1 Power Measurement on a Machine

For measuring power, all of the eight CAGE CLAMPS® have to be connected according to the figure below.

Do not confuse current and voltage clamps!

When making the connections do not confuse the current and voltage paths, as connecting the phase voltages directly to the low impedance current clamps IL1 … IL3 shall destroy the I/O module!

Figure 14: Power Measurement on a Machine

Negative power values!

If you measure negative power values, check the connection of the associated current transformer circuit in the proper direction.

7.4.2

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WAGO-I/O-SYSTEM 750 Commissioning 57 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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8 Commissioning

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The I/O module latched in the bus node and wired for the measurement can be put into operation using the WAGO-I/O-CHECK software for Windows. For that, the fieldbus coupler/controller of the node is connected, for example, to the USB port of a PC using the WAGO USB communication cable. WAGO-I/O-CHECK provides the following functions:

• Graphic display of the bus node

• Display of the process data (measured values)

• Application settings

• Settings for the measurements for each of the three phases

• I/O module settings

• Settings for saving the energy values

WAGO-I/O-CHECK

You can obtain the WAGO-I/O-CHECK software on a CD under Item No. 759-

302. This CD contains all the application program files and a description. The description is also available in the Internet at http://www.wago.com under Documentation > WAGO Software > WAGO-I/O-CHECK.

To display the bus node on the PC, use the USB communication cable to connect coupler/controller and PC and launch WAGO-I/O-CHECK.

58 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

8.1 Configuration with WAGO-I/O-CHECK

Right-click on the image of the I/O module and select the [Settings] menu item.

See the figure below:

Figure 15: WAGO-I/O-CHECK User Interface, Bus Node with I/O Module

The "3-phase power measurement" dialog opens. See figure below.

WAGO-I/O-SYSTEM 750 Commissioning 59 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Figure 16: "3-Phase Power Measurement" Dialog

The following buttons appear in the Home (1) ribbon:

[Disconnect]

Separates the fieldbus coupler/controller from the PC

[Snapshot]

Opens a "Save as" dialog to save all current measured

values and I/O module settings as a CSV file. In this dialog, enter a file name and select a location to save the file, e.g. see section "Appendix".

[Settings]

Opens the settings dialog.

[Calibration]

Opens the calibration dialog. More information is

available from the WAGO Support.

The buttons for the individual measured value views appear in the menu (2).

The status bar (3) displays the connection icon and IP address of the fieldbus coupler/controller or the name of the COM port.

Click [Settings] to open the "Settings" dialog in which you can configure the application and I/O module.

60 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Figure 17: "Settings" Dialog

The main menu (1) with the Application, Phase L1, Phase L2, Phase L3, I/O Module, Energy and Factory Settings tabs are on the left side. These are explained in more detail in the following sections.

At the window’s bottom you can find the command bar (2) with 4 buttons. Use [Import] to load the settings from your hard drive that you may have already saved when setting up another I/O module. You can change these settings if necessary and then [Save] them to the I/O module. Use [Export] to save the current settings to your computer to simplify future configurations.

Pay attention to energy values!

The energy values are not taken into account when importing and exporting!

[Save] writes any changed settings to registers, i.e. the configuration of the I/O module and the application settings are changed. The "Settings" dialog closes. To not save and discard the changed settings, click [Close]. The "Settings" dialog closes.

WAGO-I/O-SYSTEM 750 Commissioning 61 750-493 3-Phase Power Measurement Module

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8.1.1 "Application" Tab

Make application settings in the "Application" tab. These settings are not stored in the I/O module, but on the connected PC.

You specify again the decimal multiples for displaying the measuring units for the various measured variables or keep them: 10-3=milli or 100=1 or 103=kilo.

In addition, you specify the storage path for the measured value records. See "Measurement Recording" in the following section "Displaying the Measured Values via WAGO-I/O-CHECK".

Figure 18: "Application" Tab

62 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

8.1.2 "Phase L1”, “Phase L2”, “Phase L3” Tabs

Use the "Phase L1", "Phase L2", "Phase L3" tabs to configure user scaling, energy, min.-/max. values and general parameters. These settings are saved to the I/O module.

Figure 19: "Phase L1" Tab

WAGO-I/O-SYSTEM 750 Commissioning 63 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

In the event that you use current transformers to measure high currents, specify in user scaling whether you want to take into account the current transformer ratio when calculating the measured values in the respective phase or not. If yes, specify the divisor of the current transformer ratio D-CTR, e.g. "40". The maximum possible value is "50". If no, you must take the divisor into account in the higher-level PLC as a factor. Register 32 and 37 are written. For details, see section "Functional Description".

For "Energy", specify whether you want to measure a motor, i.e. a load or a generator and select the scaling factor for energy measurement, e.g. 0.01 kWh. The Register 35 is written.

For "Min.-/Max. values", specify the undervoltage threshold value and define whether the min.-/max. values are automatically reset after a specific time or not. In addition, you can reset specific min.-/max. values by selecting them and clicking [Delete].

You can also enable two checkboxes: "Enable flexible process image" and "Show cos phi with leading sign". For flexible process image, see also section "Process Image" > "Flexible Process Image".

64 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

8.1.3 "I/O Module" Tab

On the "I/O Module" tab you can do two general settings for the entire I/O module. These are "Enable watchdog" and "Enable DC measurement". The watchdog deactivates the green status LED "A" if no process data is received within 100 ms.

You can also specify the measuring cycle time. The minimum value is 39 ms, default is also 39 ms. The maximum value is 24375 ms.

Figure 20: "I/O Module" Tab

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Manual Version 1.2.0

8.1.4 "Energy" Tab

After entering a password, you can set or reset the energy values per phase on the "Energy" tab. The initial password is: wago. Please change this password on first use by clicking [Change password]. The energy values are saved automatically every 15 minutes. Use the [Save] and [Delete] commands to save the actual value or set it to 0. These actions are carried out immediately and cannot be undone. Therefore, the [Save] button is disabled at the bottom of the window.

Figure 21: "Energy" Tab

66 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

8.1.5 "Factory Settings" Tab

After entering a password (see "Energy" tab above), you can reset all parameters of the I/O module to their factory settings on the "Factory Settings" tab.

Use I/O Module Settings [Restore] to reset the I/O module settings only. Calibration data remains unchanged. Use Calibration Data [Restore] to reset the calibration data only. The I/O module settings remain unchanged. Use Total [Restore] to reset all I/O module settings and calibration data. These actions are carried out immediately and cannot be undone. Therefore, the [Save] button is disabled at the bottom of the window.

Figure 22: "Factory Settings" Tab

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8.1.6 Register Assignment

The following tables display the assignments and factory settings for the individual registers written by setting the parameters. The factory settings are the same for all three channels.

Table 25: Register 0

Function

Data type

Access

Factory setting

Overflow register for energy consumption

UINT

R/W

----

This overflow register is incremented when the register for energy consumption (can be read

out via process data index 4) starts to overrun. The overflow register can only be read out via register communication.

When the energy consumption data is deleted, this register is likewise deleted.

Table 26: Register 7

Function

Data type

Access

Factory setting

Command register

UINT

R/W

0x0000

No function. If needed, enter the value 0x0000 into the command register to delete it.

0x1004

Deleting energy consumption data (user password must be set).

Write the value 0x1004 to the command register to delete the energy consumption value stored in the process data (process data index 4) and the

overflow register for energy consumption (R0).

0x1005

Deleting the maximum current value.

Write the value 0x1005 to the command register to delete the maximum current

value stored in the process data (process data index 5).

0x1006

Deleting the maximum voltage value.

Write the value 0x1006 to the command register to delete the maximum voltage

value stored in the process data (process data index 6).

0x1009

Deleting the minimum current value.

Write the value 0x1009 to the command register to delete the minimum current

value stored in the process data (process data index 9).

0x100A

Deleting the minimum voltage value.

Write the value 0x100A to the command register to delete the minimum voltage

value stored in the process data (process data index 10).

0x1014

Intermediate saving of energy consumption value (user password must be set).

The I/O module registers the energy consumption in the RAM and only saves these values to the EEPROM in 15 minute cycles. If you wish to deactivate the I/O module without losing the energy consumption value measured since the last storage cycle, you can store the actual value

manually to the EEPROM using this command.

Lifetime of EEPROM!

If the energy values are stored in 60 s cycles, the lifetime of the EEPROM amounts to 19

years. Storing every 30 s the lifetime decreases to 9.5 years!

0x1020

Deleting all minimum and maximum values.

Write the value 0x1020 to the command register to delete all minimum and

maximum values.

0x7000

Restoring factory settings (user password must be set).

Write the value 0x7000 to the command register to restore the factory settings of registers 32 and 35 … 39. Resetting one channel automatically resets the two

other channels.

68 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 27: Register 32

Function

Data type

Access

Factory setting

Mode setting

Flags

R/W

0x0020

Bit 0: enUserScaling

0: *

User scaling deactivated; the transformation ratio is 1:1.

User scaling activated; the transformation ratio is 1: (divisor for the current transformer ratio).

Bit 1: reserved

Bit 2: disWdTimer

0: *

Watchdog timer activated: The watchdog trips and deactivates the green status LED “A” if no process data is received within 100 ms.

Watchdog timer not activated.

Bit 3: enFlexProcImage

0: *

Simple process image (compatibility mode)

Flexible process image

Bit 4: skipDCFilter

0: *

DC filter activated

DC filter is bypassed

Bit 5: reserved

Bit 6: invEnergySign

0: *

Energy consumption measurement not inverted.

Energy consumption measurement inverted (generating operation)

Bit 7: enClrMinMaxValues

0: *

Automatic deleting of minimum and maximum current, voltage and power values deactivated.

Automatic deleting of minimum and maximum current, voltage and power values activated.

Bit 8 … 15: reserved

* Factory setting

Table 28: Register 35

Function

Data type

Access

Factory setting

Scaling factor for measuring energy

UINT

R/W

0x0004

750-493

750-493/000-001

1 mWh

5 mWh

0.01 Wh

0.05 Wh

0.1 Wh

0.5 Wh

1 Wh

5 Wh

4: *

0.01 kWh

0.05 kWh

0.1 kWh

0.5 kWh

1 kWh

5 kWh

≥7:

reserved

* Factory setting

Table 29: Register 36

Function

Data type

Access

Factory setting

Undervoltage threshold;

resolution 0.1 V

UINT R/W 0x0064 (10 V)

WAGO-I/O-SYSTEM 750 Commissioning 69 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 30: Register 37

Function

Data type

Access

Factory setting

Divisor for current transformer ratio;

must be activated via register 32, bit 0

UINT R/W

0x0001

(D-CTR = 1)

Table 31: Register 38

maximum values

Function

Data type

Access

Factory setting

Time constant for automatic deleting of

minimum and maximum values;

resolution 10 ms;

must be activated via register 32, bit 7

UINT R/W 0x00C8 (2000 ms)

Table 32: Register 39

Function

Data type

Access

Factory setting

Measuring cycle period;

resolution 1 ms

UINT R/W 0x0027 (39 ms)

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70 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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8.2 Displaying the Measured Values via WAGO-I/OCHECK

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The measured values are displayed in the "3-phase power measurement" dialog in several views.

The Overview view displays the measured values of all three phases continuously. These are:

• Current, voltage Lx-N, active power, cos phi and frequency.

An undervoltage is identified as a red square.

Change of the Measuring Units!

Specify the prefixes of the measuring units by selecting Home > Settings > Application. See section "Configuration with WAGO-I/O-CHECK" > "Application" Tab. The units can only be changed in the lists with the same physical variables. For lists with different variables, base units are always used!

Figure 23: Measured Values, Overview

WAGO-I/O-SYSTEM 750 Commissioning 71 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Selecting Phase L1 (resp. L2 or L3) Measurements, the measured values of the respective phase are displayed in detailed including min. and max. values and active energy.

Figure 24: Measured Values, Phases

72 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Currents/Voltages displays all three currents with min. and max. values, all three voltages with min. and max. values, undervoltages and all three frequencies.

Figure 25: Measured Values, Currents and Voltages

WAGO-I/O-SYSTEM 750 Commissioning 73 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

If you select Power, the active power of the three phases is displayed with min. and max. values and the power factor cos phi.

Figure 26: Measured Values, Power

74 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

If you select Energies, the three total active energies are displayed that have been consumed/generated since the beginning of the measurement.

Figure 27: Measured Values, Energies

WAGO-I/O-SYSTEM 750 Commissioning 75 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Selecting DC Measurements, you can see the measured DC components of the three measuring signals, i.e. current, voltage and power of each measuring signal is displayed. Select DC mode on the "I/O Module" tab. The AC variables are then not measured and displayed.

Figure 28: Measured Values, DC

76 Commissioning WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

On the Measurement Recording view, 3 measured variables are represented in chronological sequence. You can select the measured variables you want to see in the 3 drop-down lists.

Figure 29: Measured Values, Recording

In general, you can select in the 3 waveforms whether:

• The samples are displayed over a certain period of time (with ). or

• A certain number of samples is displayed (with ).

You can then enter the duration by start and end time or the number of samples. In both cases, the measurement interval, i.e. sample rate, can also be selected from 250 to 300,000 ms.

Clicking the arrow, the [Start] button generates a drop-down list in which you can select "No Export". By doing this, no export CSV file is generated. If you click [Start] as usual, a "Save" window opens in which you can specify the storage location for the CSV file. After you have specified the storage location the measurement starts. Use [Stop] to stop the measurement prematurely. For examples of CSV files, see section "Appendix".

Use the mouse wheel to zoom in and out within the three graphic waveforms. Hold down the left mouse button to move the displayed range.

Click again to follow the current waveform.

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WAGO-I/O-SYSTEM 750 Diagnostics 77 750-493 3-Phase Power Measurement Module

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9 Diagnostics

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8 LEDs A … H indicate the operation status and possible errors.

The meaning of the indications is as follows:

Table 33: LED Diagnosis

LED

Status

Message

Off

No operational readiness or the internal data bus communication is interrupted.

Green

Operational readiness and correct internal data bus communication

Off

No error

Red

Undervoltage L1 – N *

Off

No error

Red

Override of a current measuring path

Off

No error

Red

High measuring error, caused by undervoltage of a voltage measuring path

Off

No error

Red

Undervoltage L2 – N *

Off

No error

Red

Undervoltage L3 – N *

Off

No error

Red

Override of a voltage measuring path

Off

No error

Yellow

Error of the phase sequence L1-L2-L3

*The undervoltage threshold is set on the tabs „Phase L1“, „Phase L2“ and „Phase L3“.

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78 Appendix WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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10 Appendix

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10.1 CSV Data File “Snapshot”

The following table is an example CSV data file generated in WAGO-I/OCHECK with the function [Snapshot]. All actual measured values and set parameters are listed.

7/30/2013 11:50:46 AM

WAGO Kontakttechnik

GmbH & Co. KG

I/O-Check-

3 Phase Power Measurement

(1.3.3.366)

0750-0493

/0000-0000

Measurements

Current (eff.) L1 0.261 A

Current (eff.) L3 0.188 A

Current (eff.) L2 0.48 A

Voltage (eff.) L1-N 230.4 V

Voltage (eff.) L2-N 230.4 V

Voltage (eff.) L3-N 230.4 V

Active Power L1 38.1 W

Active Power L2 18 W

Active Power L3 -25.8 W

cos phi L1 0.75

cos phi L2 0.11

cos phi L3 -0.84

Frequency L1 50 Hz

Frequency L2 50 Hz

Frequency L3 49.9 Hz

Minimum Current (eff.) L1 0.162 A

Minimum Current (eff.) L2 0.107 A

Minimum Current (eff.) L3 0.378 A

Maximum Current (eff.) L1 3.049 A

Maximum Current (eff.) L2 4.727 A

Maximum Current (eff.) L3 25.615 A

Minimum Voltage (eff.) L1-N 0 V

Minimum Voltage (eff.) L2-N 0 V

Minimum Voltage (eff.) L3-N 0 V

Maximum Voltage (eff.) L1-N 230.6 V

WAGO-I/O-SYSTEM 750 Appendix 79 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Maximum Voltage (eff.) L2-N 230.6 V

Maximum Voltage (eff.) L3-N 230.6 V

Minimum Active Power L1 -0.1 W

Minimum Active Power L2 -0.2 W

Minimum Active Power L3 -28.2 W

Maximum Active Power L1 42.8 W

Maximum Active Power L2 30.2 W

Maximum Active Power L3 3276.7 W

Active Energy L1 60 Wh

Active Energy L2 17.812 Wh

Active Energy L3 0 Wh

Parameter Phase L1

Transformer ratio 300

Heed transformer ratio True

Flexible process image active False

Leading sign cos phi positive and negative True

Energy measurement generator operation False

Automatic reset of the min./max. values False

Scaling factor energy values 1 Wh

Undervoltage threshold 0 V

Interval - reset: min./max. values 2000 ms

Parameter Phase L2

Transformer ratio 700

Heed transformer ratio True

Flexible process image active False

Leading sign cos phi positive and negative True

Energy measurement generator operation False

Automatic reset of the min./max. values False

Scaling factor energy values 1 mWh

Undervoltage threshold 0 V

Interval - reset: min./max. values 2000 ms

Parameter Phase L3

80 Appendix WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Transformer ratio 200

Heed transformer ratio True

Flexible process image active False

Leading sign cos phi positive and negative True

Energy measurement generator operation False

Automatic reset of the min./max. values False

Scaling factor energy values 1 mWh

Undervoltage threshold 0 V

Interval - reset: min./max. values 2000 ms

I/O Module Parameters

DC current measurement active False

Watchdog process data communication active False

Measuring cycle time 50 ms

10.2 CSV Data File “Measurement Recording”

The following table shows an example CSV data file generated in the view “Measurement Recording” with [Start]. In this example the variable “Voltage (eff.) L1-N” was selected shown as measuring series with 10 values.

04.07.2013 07:47:24

WAGO Kontakttechnik GmbH & Co.

I/O-Check-

3 Phase Power Measurement

(1.3.3.366)

0750-0493

/0000-0000

Voltage

(eff.) L1-N

04.07.2013 07:47:24 230

04.07.2013 07:47:25 230

04.07.2013 07:47:25 229.9

04.07.2013 07:47:26 230

04.07.2013 07:47:26 229.9

04.07.2013 07:47:27 230

04.07.2013 07:47:27 229.9

04.07.2013 07:47:28 230

04.07.2013 07:47:29 230

WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 81 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11 Use in Hazardous Environments

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The WAGO-I/O-SYSTEM 750 (electrical equipment) is designed for use in Zone 2 hazardous areas.

The following sections include both the general identification of components (devices) and the installation regulations to be observed. The individual subsections of the “Installation Regulations” section must be taken into account if the I/O module has the required approval or is subject to the range of application of the ATEX directive.

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82 Use in Hazardous Environments WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.1 Marking Configuration Examples

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11.1.1 Marking for Europe According to ATEX and IEC-Ex

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Figure 30: Side Marking Example for Approved I/O Modules According to ATEX and IECEx

Figure 31: Text Detail – Marking Example for Approved I/O Modules According to ATEX and IECEx.

WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 83 750-493 3-Phase Power Measurement Module

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Table 34: Description of Marking Example for Approved I/O Modules According to ATEX and IECEx

Printing on Text

Description

TÜV 07 ATEX 554086 X IECEx TUN 09.0001 X

Approving authority and certificate numbers

Dust

Equipment group: All except mining

Category 3 (Zone 22)

Explosion protection mark

tc Dc

Type of protection and equipment protection level (EPL):protection by enclosure

IIIC

Explosion group of dust

T 135°C

Max. surface temperature of the enclosure (without a dust layer)

Mining

Equipment group: Mining

Category: High level of protection

Explosion protection mark

d Mb

Type of protection and equipment protection level (EPL): Flameproof enclosure

Explosion group for electrical equipment for mines susceptible to firedamp

Gases

Equipment group: All except mining

Category 3 (Zone 2)

Explosion protection mark

nA Gc

Type of protection and equipment protection level (EPL): Non-sparking equipment

nC Gc

Type of protection and equipment protection

level (EPL): Sparking apparatus with protected contacts. A device which is so constructed that the external atmosphere cannot gain access to the

interior

IIC

Explosion group of gas and vapours

Temperature class: Max. surface temperature 135°C

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84 Use in Hazardous Environments WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

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Figure 32: Side Marking Example for Approved Ex i I/O Modules According to ATEX and IECEx.

Figure 33: Text Detail – Marking Example for Approved Ex i I/O Modules According to ATEX and IECEx.

WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 85 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 35: Description of Marking Example for Approved Ex i I/O Modules According to ATEX and IECEx

Inscription Text

Description

TÜV 07 ATEX 554086 X

IECEx TUN 09.0001X

TÜV 12 ATEX 106032 X

IECEx TUN 12.0039 X

Approving authority and certificate numbers

Dust

Equipment group: All except mining

3(1)D

Category 3 (Zone 22) equipment containing a safety device for a category 1 (Zone 20) equipment

3(2)D

Category 3 (Zone 22) equipment containing a safety device for a category 2 (Zone 21) equipment

Explosion protection mark

tc Dc

Type of protection and equipment protection level (EPL): protection by enclosure

[ia Da]

Type of protection and equipment protection level

(EPL): associated apparatus with intrinsic safety

circuits for use in Zone 20

[ib Db]

Type of protection and equipment protection level

(EPL): associated apparatus with intrinsic safety

circuits for use in Zone 21

IIIC

Explosion group of dust

T 135°C

Max. surface temperature of the enclosure (without a dust layer)

Mining

Equipment Group: Mining

M2 (M1)

Category: High level of protection with electrical circuits which present a very high level of protection

Ex d Mb

Explosion protection mark with Type of protection

and equipment protection level (EPL): Flameproof

enclosure

[ia Ma]

Type of protection and equipment protection level

(EPL): associated apparatus with intrinsic safety

electrical circuits

I Explosion group for electrical equipment for mines susceptible to firedamp

86 Use in Hazardous Environments WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

Table 35: Description of Marking Example for Approved Ex i I/O Modules According to ATEX and IECEx

Gases

Equipment group: All except mining

3(1)G

Category 3 (Zone 2) equipment containing a safety device for a category 1 (Zone 0) equipment

3(2)G

Category 3 (Zone 2) equipment containing a safety device for a category 2 (Zone 1) equipment

Explosion protection mark

nA Gc

Type of protection and equipment protection level (EPL): Non-sparking equipment

[ia Ga]

Type of protection and equipment protection level

(EPL): associated apparatus with intrinsic safety

circuits for use in Zone 0

[ia Gb]

Type of protection and equipment protection level

(EPL): associated apparatus with intrinsic safety

circuits for use in Zone 1

IIC

Explosion group of gas and vapours

Temperature class: Max. surface temperature 135°C

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WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 87 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.1.2 Marking for America According to NEC 500

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Figure 34: Side Marking Example for I/O Modules According to NEC 500

Figure 35: Text Detail – Marking Example for Approved I/O Modules According to NEC 500

Table 36: Description of Marking Example for Approved I/O Modules According to NEC 500

Printing on Text

Description

CL I

Explosion protection group (condition of use category)

DIV 2

Area of application

Grp. ABCD

Explosion group (gas group)

Op temp code T4

Temperature class

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88 Use in Hazardous Environments WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.2 Installation Regulations

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For the installation and operation of electrical equipment in hazardous areas, the valid national and international rules and regulations which are applicable at the installation location must be carefully followed.

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WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 89 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.2.1 Special Conditions for Safe Use (ATEX Certificate TÜV 07 ATEX 554086 X)

1. For use as Gc- or Dc-apparatus (in zone 2 or 22) the Field bus Independent

I/O Modules WAGO-I/O-SYSTEM 750-*** shall be erected in an enclosure that fulfils the requirements of the applicable standards (see the marking) EN 60079-0, EN 60079-11, EN 60079-15 and EN 60079-31. For use as group I electrical apparatus M2 the apparatus shall be erected in an enclosure that ensures a sufficient protection according to EN 60079-0 and EN 60079-1 and the degree of protection IP64. The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by an ExNB.

2. Measures have to be taken outside of the device that the rating voltage is not

being exceeded of more than 40 % because of transient disturbances.

3. Dip-switches, binary-switches and potentiometers, connected to the module

may only be actuated when explosive atmosphere can be excluded.

4. The connecting and disconnecting of the non-intrinsically safe circuits is

only permitted during installation, for maintenance or for repair purposes. The temporal coincidence of explosion hazardous atmosphere and installation, maintenance resp. repair purposes shall be excluded. This is although and in particular valid for the interfaces “Memory-Card”, “USB”, “Fieldbus connection”, “Configuration and programming interface”, “antenna socket”, “D-Sub”, “DVI-port” and the “Ethernet interface”. These interfaces are not energy limited or intrinsically safe circuits. An operating of those circuits is in the behalf of the operator.

5. For the types 750-606, 750-625/000-001, 750-487/003-000, 750-484 and

750-633 the following shall be considered: The Interface circuits shall be limited to overvoltage category I/II/III (non mains/mains circuits) as defined in EN 60664-1.

6. For replaceable fuses the following shall be considered: Do not remove or

replace the fuse when the apparatus is energized.

7. The following warnings shall be placed nearby the unit:

WARNING – DO NOT REMOVE OR REPLACE FUSE WHEN ENERGIZED WARNING – DO NOT SEPARATE WHEN ENERGIZED WARNING – SEPARATE ONLY IN A NON-HAZARDOUS AREA

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90 Use in Hazardous Environments WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.2.2 Special Conditions for Safe Use (ATEX Certificate TÜV 12 ATEX 106032 X)

1. For use as Gc- or Dc-apparatus (in zone 2 or 22) the Field bus Independent

I/O Modules WAGO-I/O-SYSTEM 750-*** Ex i shall be erected in an enclosure that fulfils the requirements of the applicable standards (see the marking) EN 60079-0, EN 60079-11, EN 60079-15 and EN 60079-31. For use as group I electrical apparatus M2 the apparatus shall be erected in an enclosure that ensures a sufficient protection according to EN 60079-0 and EN 60079-1 and the degree of protection IP64. The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by an ExNB.

2. Measures have to be taken outside of the device that the rating voltage is not

being exceeded of more than 40 % because of transient disturbances.

3. The connecting and disconnecting of the non-intrinsically safe circuits is

4. For the type the following shall be considered: The Interface circuits shall

be limited to overvoltage category I/II/III (non mains/mains circuits) as defined in EN 60664-1.

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WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 91 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.2.3 Special Conditions for Safe Use (IEC-Ex Certificate TUN

09.0001 X)

1. For use as Gc- or Dc-apparatus (in zone 2 or 22) the Field bus Independent

I/O Modules WAGO-I/O-SYSTEM 750-*** shall be erected in an enclosure that fulfils the requirements of the applicable standards (see the marking) IEC 60079-0, IEC 60079-11, IEC 60079-15 and IEC 60079-31. For use as group I electrical apparatus M2 the apparatus shall be erected in an enclosure that ensures a sufficient protection according to IEC 60079-0 and IEC 60079-1 and the degree of protection IP64. The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by an ExCB.

2. Measures have to be taken outside of the device that the rating voltage is not

being exceeded of more than 40 % because of transient disturbances.

3. DIP-switches, binary-switches and potentiometers, connected to the module

may only be actuated when explosive atmosphere can be excluded.

4. The connecting and disconnecting of the non-intrinsically safe circuits is

5. For the types 750-606, 750-625/000-001, 750-487/003-000, 750-484 and

750-633 the following shall be considered: The Interface circuits shall be limited to overvoltage category I/II/III (non mains/mains circuits) as defined in IEC 60664-1.

6. For replaceable fuses the following shall be considered: Do not remove or

replace the fuse when the apparatus is energized.

7. The following warnings shall be placed nearby the unit:

WARNING – DO NOT REMOVE OR REPLACE FUSE WHEN ENERGIZED WARNING – DO NOT SEPARATE WHEN ENERGIZED WARNING – SEPARATE ONLY IN A NON-HAZARDOUS AREA

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92 Use in Hazardous Environments WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.2.4 Special Conditions for Safe Use (IEC-Ex Certificate IECEx TUN 12.0039 X)

1. For use as Gc- or Dc-apparatus (in zone 2 or 22) the Field bus independent

I/O Modules WAGO-I/O-SYSTEM 750-*** Ex i shall be erected in an enclosure that fulfils the requirements of the applicable standards (see the marking) IEC 60079-0, IEC 60079-11, IEC 60079-15, IEC 60079-31. For use as group I electrical apparatus M2 the apparatus shall be erected in an enclosure that ensures a sufficient protection according to IEC 60079-0 and IEC 60079-1 and the degree of protection IP64. The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by an ExCB.

2. Measures have to be taken outside of the device that the rating voltage is not

being exceeded of more than 40 % because of transient disturbances.

3. The connecting and disconnecting of the non-intrinsically safe circuits is

4. For the type the following shall be considered: The Interface circuits shall

be limited to overvoltage category I/II/III (non mains/mains circuits) as defined in IEC 60664-1.

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WAGO-I/O-SYSTEM 750 Use in Hazardous Environments 93 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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11.2.5 Special Conditions for Safe Use According to ANSI/ISA

12.12.01

A. “This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D

or non-hazardous locations only.” B. “This equipment is to be fitted within tool-secured enclosures only.” C. “WARNING Explosion hazard - substitution of components may impair

suitability for Class I, Div. 2.” D. “WARNING – Do not disconnect equipment unless power has been

switched off or the area is known to be non-hazardous” has to be placed

near each operator accessible connector and fuse holder. E. When a fuse is provided, the following information shall be provided: “A

switch suitable for the location where the equipment is installed shall be

provided to remove the power from the fuse.” F. For devices with EtherCAT/Ethernet connectors “Only for use in LAN, not

for connection to telecommunication circuits.” G. “WARNING - Use Module 750-642 only with antenna module 758-910.” H. For Couplers/Controllers and Economy bus modules only: The instructions

shall contain the following: “The configuration interface Service connector

is for temporary connection only. Do not connect or disconnect unless the

area is known to be non-hazardous. Connection or disconnection in an

explosive atmosphere could result in an explosion.” I. Modules containing fuses only: “WARNING - Devices containing fuses

must not be fitted into circuits subject to over loads, e.g. motor circuits.” J. Modules containing SD card reader sockets only: “WARNING - Do not

connect or disconnect SD-Card while circuit is live unless the area is known

to be free of ignitable concentrations of flammable gases or vapors.”

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Additional Information

Proof of certification is available on request. Also take note of the information given on the operating and assembly instructions. The manual, containing these special conditions for safe use, must be readily available to the user.

=== Ende der Lis te f ür T e xtmar ke I nh alt _mitt e == =

94 List of Figures WAGO-I/O-SYSTEM 750 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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List of Figures

Figure 1: View ....................................................................................................... 16

Figure 2: Data Contacts ......................................................................................... 17

Figure 3: CAGE CLAMP® Connectors................................................................. 18

Figure 4: LED-indicators ....................................................................................... 19

Figure 5: Schematic Diagram ................................................................................ 20

Figure 6: RMS Value Calculation (Example, Not to Scale) ................................. 36

Figure 7: 4-Quadrant Display of Active and Reactive Power ............................... 37

Figure 8: Insert I/O Module (Example) ................................................................. 48

Figure 9: Snap the I/O Module into Place (Example) ........................................... 48

Figure 10: Removing the I/O Module (Example) ................................................. 49

Figure 11: Connecting a Conductor to a CAGE CLAMP® ................................... 50

Figure 12: Voltage Measurement .......................................................................... 51

Figure 13: Current Measurement on a Motor ........................................................ 52

Figure 14: Power Measurement on a Machine ...................................................... 56

Figure 15: WAGO-I/O-CHECK User Interface, Bus Node with I/O Module ...... 58

Figure 16: "3-Phase Power Measurement" Dialog ................................................ 59

Figure 17: "Settings" Dialog ................................................................................. 60

Figure 18: "Application" Tab ................................................................................ 61

Figure 19: "Phase L1" Tab .................................................................................... 62

Figure 20: "I/O Module" Tab ................................................................................ 64

Figure 21: "Energy" Tab ....................................................................................... 65

Figure 22: "Factory Settings" Tab ......................................................................... 66

Figure 23: Measured Values, Overview ................................................................ 70

Figure 24: Measured Values, Phases ..................................................................... 71

Figure 25: Measured Values, Currents and Voltages ............................................ 72

Figure 26: Measured Values, Power ..................................................................... 73

Figure 27: Measured Values, Energies .................................................................. 74

Figure 28: Measured Values, DC .......................................................................... 75

Figure 29: Measured Values, Recording ............................................................... 76

Figure 30: Side Marking Example for Approved I/O Modules According to

ATEX and IECEx ........................................................................................ 82

Figure 31: Text Detail – Marking Example for Approved I/O Modules According

to ATEX and IECEx. ................................................................................... 82

Figure 32: Side Marking Example for Approved Ex i I/O Modules According to

ATEX and IECEx. ....................................................................................... 84

Figure 33: Text Detail – Marking Example for Approved Ex i I/O Modules

According to ATEX and IECEx. ................................................................. 84

Figure 34: Side Marking Example for I/O Modules According to NEC 500 ....... 87

Figure 35: Text Detail – Marking Example for Approved I/O Modules According

to NEC 500 .................................................................................................. 87

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WAGO-I/O-SYSTEM 750 List of Tables 95 750-493 3-Phase Power Measurement Module

Manual Version 1.2.0

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List of Tables

Table 1: Variants ..................................................................................................... 6

Table 2: Revision History ........................................................................................ 7

Table 3: Number Notation ..................................................................................... 10

Table 4: Font Conventions .................................................................................... 10

Table 5: Legend for Figure “View” ...................................................................... 16

Table 6: Legend for Figure “CAGE CLAMP® Connectors” ................................ 18

Table 7: Technical Data ‒ Dimensions and Weight .............................................. 21

Table 8: Technical Data ‒ Voltage Supply ........................................................... 21

Table 9: Technical Data ‒ Measuring Inputs ........................................................ 21

Table 10: Technical Data ‒ Measuring Signal Processing .................................... 22

Table 11: Technical Data ‒ Internal Bus Communication .................................... 22

Table 12: Technical Data – Data Contacts ............................................................ 22

Table 13: Technical Data – Field Wiring .............................................................. 22

Table 14: Technical Data – Climatic Environmental Conditions ......................... 23

Table 15: Input and Output Data ........................................................................... 26

Table 16: Simple Process Image ........................................................................... 27

Table 17: Control Byte C0 .................................................................................... 29

Table 18: Status Byte S0 ....................................................................................... 30

Table 19: Control Byte C1 .................................................................................... 31

Table 20: Status Byte S1 ....................................................................................... 32

Table 21: Control Byte C2 .................................................................................... 33

Table 22: Status Byte S2 ....................................................................................... 34

Table 23: Measured Values in the Process Image (PI) ......................................... 39

Table 24: AC Measuring Errors ............................................................................ 46

Table 25: Register 0 .............................................................................................. 67

Table 26: Register 7 .............................................................................................. 67

Table 27: Register 32 ............................................................................................ 68

Table 28: Register 35 ............................................................................................ 68

Table 29: Register 36 ............................................................................................ 68

Table 30: Register 37 ............................................................................................ 69

Table 31: Register 38 ............................................................................................ 69

Table 32: Register 39 ............................................................................................ 69

Table 33: LED Diagnosis ...................................................................................... 77

Table 34: Description of Marking Example for Approved I/O Modules According

to ATEX and IECEx .................................................................................... 83

Table 35: Description of Marking Example for Approved Ex i I/O Modules

According to ATEX and IECEx .................................................................. 85

Table 36: Description of Marking Example for Approved I/O Modules According

to NEC 500 .................................................................................................. 87

=== Ende der Lis te f ür T e xtmar ke V erz eic hni s_hi nte n ===

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WAGO Kontakttechnik GmbH & Co. KG

Postfach 2880 •

D-32385 Minden

Hansastraße 27 •

D-32423 Minden

Phone:

05 71/8 87 – 0

Fax:

05 71/8 87 – 1 69

E-Mail:

info@wago.com

Internet:

http://www.wago.com

=== Ende der Lis te f ür T e xtmar ke E inb and _hi nte n == =

WAGO SYSTEM 750 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual