WAGO WAGO-I/O-SYSTEM 750 Series User manual

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Manual
WAGO-I/O-SYSTEM 750
3-Phase Power Measurement Module
750-495(/xxx-xxx)
Version 1.0.0
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2 WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
© 2013 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.
WAGO Kontakttechnik GmbH & Co. KG
Hansastraße 27
D-32423 Minden
Phone: [phone] – 0
Fax: [phone] – 1 69
E-Mail: [email protected]om
Web: http://www.wago.com
Technical Support
Phone: [phone] – 5 55
Fax: [phone] – 85 55
E-Mail: [email protected]om
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: [e-mail]
We wish to point out that the software and hardware terms as well as the
trademarks of companies used and/or mentioned in the present manual are
generally protected by trademark or patent.
=== Ende d er Liste f ür T e xtmar ke Ei nb and _v orne = ==

WAGO-I/O-SYSTEM 750 Table of Contents 3
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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Table of Contents
1Notes about this Documentation................................................................. 5
1.1 Validity of this Documentation................................................................. 5
1.2 Revision History........................................................................................ 5
1.3 Copyright................................................................................................... 5
1.4 Symbols..................................................................................................... 6
1.5 Number Notation....................................................................................... 7
1.6 Font Conventions ...................................................................................... 7
2Important Notes........................................................................................... 8
2.1 Legal Bases ............................................................................................... 8
2.1.1 Subject to Changes............................................................................... 8
2.1.2 Personnel Qualifications....................................................................... 8
2.1.3 Use of the 750 Series in Compliance with Underlying Provisions...... 8
2.1.4 Technical Condition of Specified Devices........................................... 9
2.2 Safety Advice (Precautions)...................................................................... 9
3Device Description ..................................................................................... 12
3.1 View........................................................................................................ 13
3.2 Connectors............................................................................................... 14
3.2.1 Data Contacts/Internal Bus................................................................. 14
3.2.2 Power Jumper Contacts/Field Supply ................................................ 14
3.2.3 CAGE CLAMP®Connectors............................................................. 15
3.3 Display Elements .................................................................................... 17
3.4 Operating Elements................................................................................. 17
3.5 Schematic Diagram................................................................................. 18
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 Measured Values ................................................................................ 22
3.6.5 Internal Bus Communication.............................................................. 23
3.6.6 Connection Type ................................................................................ 23
3.6.7 Climatic Environmental Conditions................................................... 23
3.7 Approvals................................................................................................ 24
3.8 Standards and Guidelines........................................................................ 24
4Function Description ................................................................................. 25
4.1 Measuring Principle ................................................................................ 25
4.2 Measured Values..................................................................................... 25
4.3 Description of Measured Values............................................................. 27
4.4 Measuring Errors and Accuracy.............................................................. 33
5Process Image............................................................................................. 36
5.1 Overview of Process Data....................................................................... 36
5.2 Output Data............................................................................................. 37
5.2.1 Definition of Control Words .............................................................. 37
5.2.2 Definition of Output Data Words....................................................... 38
5.3 Input Data................................................................................................ 39
5.3.1 Definition of Status Words................................................................. 39

4 Table of Contents WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
5.3.2 Definition of Input Data Words.......................................................... 42
5.4 Process Image Descriptions .................................................................... 46
5.4.1 Collection AC Measured Values (010) .............................................. 47
5.4.2 Collections for Harmonics Analysis (020, 021, 022)......................... 48
5.4.3 Building-up the Measured Values...................................................... 50
5.5 Collections of Measured Values ............................................................. 51
5.5.1 Collection 010 – AC Measured Values.............................................. 51
5.5.2 Collection 020 – Harmonics Analysis on L1 ..................................... 56
5.5.3 Collection 021 – Harmonics Analysis on L2 ..................................... 57
5.5.4 Collection 022 – Harmonics Analysis on L3 ..................................... 58
5.6 Examples of Calculating the Measured Values from the Process Values59
6Mounting..................................................................................................... 63
6.1 Mounting Sequence................................................................................. 63
6.2 Inserting and Removing Devices ............................................................ 64
6.2.1 Inserting I/O Module.......................................................................... 64
6.2.2 Removing the I/O Module.................................................................. 65
7Connect Devices ......................................................................................... 66
7.1 Connecting a Conductor to the CAGE CLAMP®................................... 66
7.2 Voltage Measurement ............................................................................. 67
7.3 Current Measurement.............................................................................. 68
7.3.1 Current Measurement on a Motor ...................................................... 68
7.3.2 Current Transformers ......................................................................... 69
7.3.3 ‘Rogowski’ Coils................................................................................ 71
7.3.4 Additional Measuring Instruments in a Current Path......................... 71
7.4 Power Measurement................................................................................ 72
8Commissioning........................................................................................... 73
8.1 Configuration with WAGO-I/O-CHECK ............................................... 74
8.1.1 “Application“ Tab .............................................................................. 77
8.1.2 "Phase L1”, “Phase L2”, “Phase L3” Tabs ........................................ 79
8.1.3 “Neutral Conductor” Tab ................................................................... 81
8.1.4 “I/O Module“ Tab............................................................................... 82
8.1.5 “Energy“ Tab...................................................................................... 85
8.1.6 "Factory Settings" Tab ....................................................................... 87
8.2 Displaying the Measured Values via WAGO-I/O-CHECK.................... 89
9Diagnostics.................................................................................................. 98
10 Appendix..................................................................................................... 99
10.1 Examples of CSV Data Files................................................................... 99
10.1.1 Snapshot ............................................................................................. 99
10.1.2 Measurement Recording................................................................... 103
10.2 Factory Settings..................................................................................... 104
10.3 Register Assignment ............................................................................. 106
10.4 Parameter Assignment .......................................................................... 112
List of Figures.................................................................................................... 119
List of Tables...................................................................................................... 120
=== En de der Lis te für T extmar ke Verz eich nis_vor ne == =

WAGO-I/O-SYSTEM 750 Notes about this Documentation 5
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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1 Notes about this Documentation
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Keep this documentation!
The operating instructions are part of the product and shall be kept for the entire
lifetime of the device. They shall be transferred to each subsequent owner or user
of the device. Care must also be taken to ensure that any supplement to these
instructions are included, if applicable.
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1.1 Validity of this Documentation
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This documentation is only applicable to the I/O module 750-495 (3-Phase Power
Measurement Module) of the WAGO-I/O-SYSTEM 750 series and the variants
listed in the table below.
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Table 1: Variants
Item Number
Description
750-495
3-Phase Power Measurement Module 1 A
750-495/000-001
3-Phase Power Measurement Module 5 A
750-495/000-002
3-Phase Power Measurement Module R.C.
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The I/O module 750-495 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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Table 2: Revision history
Document
version
Device version
Description of change
Hardware
Software
1.0.0
01
01
First issue
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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

6 Notes about this Documentation WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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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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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WAGO-I/O-SYSTEM 750 Notes about this Documentation 7
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Important Note!
Indicates a potential malfunction which, if not avoided, however, will not result in
damage to property.
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Additional Information:
Refers to additional information which is not an integral part of this
documentation (e.g., the Internet).
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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:\Programme\WAGO-I/O-CHECK
Menu
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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8 Important Notes WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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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 Series 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 750 Series in Compliance with Underlying
Provisions
Couplers, 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 the actuators or higher-level control systems. Using programmable controllers,
the signals can also be (pre-) processed.
The components 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 components in wet and
dusty environments is prohibited.
Operating 750 Series components 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
on "WAGO-I/O-SYSTEM 750" "System Description" "Technical Data" in
the manual for the used fieldbus coupler/controller.

WAGO-I/O-SYSTEM 750 Important Notes 9
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Appropriate housing (per 94/9/EG) is required when operating the WAGO-I/O-
SYSTEM 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 components 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
components.
Please send your request for modified and new hardware or software
configurations directly to WAGO Kontakttechnik GmbH & Co. KG.
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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 components 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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Installation 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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10 Important Notes WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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!
Pos: 18.1 3.1 / Alle Seri en ( Allg em ein e D oku ment e) ( Allg em eine M o dul e)/ Wich tig e Er läut eru ngen /Sic h erh eits hin weise /Ac htu ng/ Acht ung : Defe kte oder besc hädig te Ger äte aus tausc hen! @ 6\mod_1260180857358_21.docx@ 46743@ @ 1
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.
Pos: 18.1 3.2 / Alle Seri en ( Allg em ein e D oku ment e) ( Allg em eine M o dul e)/ Wich tig e Er läut eru ngen /Sic h erh eits hin weise /Ac htu ng/ Acht ung : Gerä te vor kri eche nden u ndis olier end en Stoff en schüt zen! @ 6\mod_1260181036216_21.docx@ 46747@ @ 1
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.
Pos: 18.1 3.3 / Alle Seri en ( Allg em ein e D oku ment e) ( Allg em eine M o dul e)/ Wich tig e Er läut eru ngen /Sic h erh eits hin weise /Ac htu ng/ Acht ung : Rei ni gu ng n ur mi t zul äs sig en M at erial ien! @ 6\mod_1260181203293_21.docx@ 46751@ @ 1
Cleaning only with permitted materials!
Clean soiled contacts using oil-free compressed air or with ethyl alcohol and
leather cloths.
Pos: 18.1 3.4 / Alle Seri en ( Allg em ein e D oku ment e) ( Allg em eine M o dul e)/ Wich tig e Er läut eru ngen /Sic h erh eits hin weise /Ac htu ng/ Acht ung : K ein K o nta ktspr ay verwe nde n! @ 6\mod_1260181290808_21.docx@ 46755@ @ 1
Do not use any contact spray!
Do not use any contact spray. The spray may impair contact area functionality in
connection with contamination.
Pos: 18.1 3.5 / Alle Seri en ( Allg em ein e D oku ment e) ( Allg em eine M o dul e)/ Wich tig e Er läut eru ngen /Sic h erh eits hin weise /Ac htu ng/ Acht ung : V erp olung ver mei den! @ 6\mod_1260184045744_21.docx @ 46767@ @ 1
Do not reverse the polarity of connection lines!
Avoid reverse polarity of data and power supply lines, as this may damage the
devices involved.
Pos: 18.1 3.6 / Alle Seri en ( Allg em ein e D oku ment e) ( Allg em eine M o dul e)/ Wich tig e Er läut eru ngen /Sic h erh eits hin weise /Ac htu ng/ Acht ung : El ektr ost ati sch e E ntla dung ver meid en! @ 6\mod_1260181364729_21.docx@ 46759@ @ 1

WAGO-I/O-SYSTEM 750 Important Notes 11
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Avoid electrostatic discharge!
The devices are equipped with electronic components that you may destroy by
electrostatic discharge when you touch. Pay attention while handling the devices
to good grounding of the environment (persons, job and packing).
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12 Device Description WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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3 Device Description
Pos: 21 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /Ei nlei t ung /An alog ei nga ng skle mm en/ Ger äte bes chr eib ung - Einl eitu ng 750-049 5 @ 16\mod_1376321299425_21.docx@ 128508@ @ 1
The 3-Phase Power Measurement Module (also called I/O Module) measures the
electrical data in a 3-phase supply network.
The 3 phase voltages are measured via connection to L1, L2, L3 and N. The
currents are fed to I1+ and I1−, I2+ and I2−, I3+ and I3−, IN+ and IN−via current
transformers resp. via ‘Rogowski’ coils to RC1+ and RC1−, RC2+ and RC2−,
RC3+ and RC3−, RCN+ and RCN−. Based on these input signals the I/O module
calculates numerous AC values like voltages, currents, powers (active, reactive
and apparent), energies, power factors, phase shift angles and frequencies.
Furthermore, an analysis of harmonic waves is carried out up to the 41st harmonic.
The measured values are available in the process image. Therefore, no high
computing power is required from the higher-level controller.
The calculated values indicate whether the load is inductive or capacitive and
whether it consumes or generates energy. For this purpose a 4-quadrant display is
incorporated in WAGO-I/O-CHECK.
The I/O module provides a great number of measured values for a comprehensive
supply network analysis via the fieldbus. By means of the measured values the
operator can regulate the supply to a drive or machine in the best possible way
and protect the installation from damage/failure.
The I/O module 750-495 measures currents up to 1 A, 750-495/000-001 measures
currents up to 5 A and 750-495/000-002 measures currents via ‘Rogowski’ coils
RT500 up to 500 A or via RT2000 up to 2000 A.
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WAGO-I/O-SYSTEM 750 Device Description 13
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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3.1 View
Pos: 24 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /A nsic ht /A nal ogei ng ang skl em men/ Ans ich t 75 0-0495@ 16\mod_1376316917249_21.docx@ 128480@ @ 1
Figure 1: View of 750-495 and 750-495/000-001 (left) and 750-495/000-002 (right)
Pos: 25 /S erie 7 50 (WA GO-I/ O-SYST EM)/ Gerät ebesc hrei bung/A nsic ht/Ans icht C ageCl amp® _Leg ende mit LED s_ ohne Leis tung skont akte @ 1 6\mod_1371816091053_21.docx@ 124052@ @ 1
Table 5: Caption acc. to figure “View”
Pos.
Description
Details see section
1
Marking possibility with
Mini-WSB
---
2
Status LEDs
“Device Description” > “Display Elements”
3
Data contacts
“Device Description” > ”Connectors”
4
CAGE CLAMP®supplies
“Device Description” > ”Connectors”
5
Release tab
“Mounting” > ”Inserting and Removing
Devices”
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14 Device Description WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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3.2 Connectors
Pos: 28 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /A nsc hl üss e/Da te nko nta kt e/Kl em men bus - Ü bersc hrift 3 @ 6\mod_1256294684083_21.docx@ 43660@ 3 @ 1
3.2.1 Data Contacts/Internal Bus
Pos: 29 .1 /Ser ie 750 (W AGO-I/O-S YST EM )/ Ger äte besc hr ei bung /Ans chl üs se/ Da ten kon tak te - F eld bus kop pler/-c ontr oller ,A bbild ung und B eschr eibu ng @ 3\mod_1231771259187_21.docx@ 26002@ @ 1
Communication between the 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
Pos:29.2/Serie750(WAGO-I/O-SYST EM)/ Wichti ge Erlä uteru nge n/Si cher heits - und s onsti g e Hin wei se/ Ach tung /A chtu ng: Buskl em men nicht auf G oldf e derk onta kt e leg en! @ 7\mod_1266318463636_21.docx@ 50695 @ @ 1
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!
Pos:29.3/Serie750(WAGO-I/O-S YSTEM) /Wic htige Er läut erung en/Si cherh eits- undsonstigeHinweise/Achtung/Achtung:ESD - Auf g ute Erd ung der U mgeb ung acht en! @ 7\mod_1266318538667_21.docx @ 50708 @ @1
Ensure that the environment is well grounded!
The modules are equipped with electronic components that may be destroyed by
electrostatic discharge. When handling the modules, ensure that the environment
(persons, workplace and packing) is well grounded. Avoid touching conductive
components, e.g. data contacts.
Pos: 30 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /A nsc hl üss e/Lei st ung s kont akt e/F el dvers org u ng - Ü bersc hrift 3 @ 6\mod_1256294692864_21.docx@ 43664@ 3 @ 1
3.2.2 Power Jumper Contacts/Field Supply
Pos: 31 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /A nsc hl üss e/Lei st ung s kont akt e ni cht vorh and en @ 8\mod_1281073936319_21.docx@ 62530 @ @1
The I/O module 750-495 has no power jumper contacts.
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WAGO-I/O-SYSTEM 750 Device Description 15
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Pos: 33 /S erie 7 50 ( WAG O-I/O-S YST EM) / Ger äteb esc hrei bu ng /Ans chl üs se/C AG E C LAM P-Ans chl üss e - Ü bers chri ft 3@ 6\mod_1256296337770_21.docx@ 43674 @3 @ 1
3.2.3 CAGE CLAMP®Connectors
Pos: 34 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /A nsc hl üss e/A nalog ei ng ang skl em men /Ans chl üs se 750-0495 C AG E C LAM P @ 16 \mod_1376319713900_21.docx@ 128499@ @ 1
12 CAGE CLAMP® connectors make up the measuring inputs. The 3-phase
supply network and the loads/generators are clamped here. See also section
„Connect Devices“.
Three connectors each form the measuring channels:
• Channel 1: L1, I1+ and I1− (voltage and current of phase L1)
• Channel 2: L2, I2+ and I2− (voltage and current of phase L2)
• Channel 3: L3, I3+ and I3− (voltage and current of phase L3)
• Channel 4: IN+ and IN− (current of neutral conductor)
Figure 3: CAGE CLAMP®connectors 750-495 and 750-495/000-001
Table 6: CAGE CLAMP®connectors 750-495 and 750-495/000-001
Connector
Function
L1
Voltage L1
L2
Voltage L2
L3
Voltage L3
N
Neutral conductor
(reference for all measurements)
I1+ and I1−
Current L1
I2+ and I2−
Current L2
I3+ and I3−
Current L3
IN+ and IN−
Current N

16 Device Description WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Figure 4: CAGE CLAMP®connectors 750-495/000-002
Table 7: CAGE CLAMP®connectors 750-495/000-002
Connector
Function
L1
Voltage L1
L2
Voltage L2
L3
Voltage L3
N
Neutral conductor
(reference for all measurements)
RC1+ and RC1−
Current L1 via ‘Rogowski coil’
RC2+ and RC2−
Current L2 via ‘Rogowski coil’
RC3+ and RC3−
Current L3 via ‘Rogowski coil’
RCN+ and RCN−
Current N via ‘Rogowski coil’
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WAGO-I/O-SYSTEM 750 Device Description 17
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
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3.3 Display Elements
Pos: 37 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /A nz eige ele men te /Anal og ei nga ng skle mm en/ Anz eig eel eme nt e 7 50-0494 , -0495@ 16\mod_1371738731125_2 1.doc x @ 123880 @ @1
LED A indicates the operating status, LEDs B … H indicate possible errors.
Figure 5: LED-indicators
The meaning of these indications is as follows:
Status Message
LED A Off
No operational readiness or
the internal data bus communication is interrupted.
Note: If the watchdog was disabled, the LED is always
green. See section “Commissioning” > “Configuration
with WAGO-I/O-CHECK“.
Green
Operational readiness and correct internal data bus
communication
LED B
Off
No error
Red
General error message for L1:
Under-/overvoltage or overcurrent
LED C
Off
No error
Red
General error message: Clipping of a current measuring
path IL1, IL2 or IL3
LED D
Off
No error
Red
High measuring error, caused by undershooting the min.
voltage at L1, L2 or L3
LED E
Off
No error
Red
General error message for L2:
Under-/overvoltage or overcurrent
LED F
Off
No error
Red
General error message for L3:
Under-/overvoltage or overcurrent
LED G
Off
No error
Red
General error message: Clipping of a voltage measuring
path L1, L2 or L3
LED H
Off
No error
Yellow
Error of the phase sequence L1-L2-L3
Pos: 38 /A lle Ser ien (Al lge meine Mo dule)/ Über schrif ten für alle S erie n/Gerä tebes chr eib ung /Be die nele ment e - Ü ber schr ift 2 @ 4 \mod_1239191655456_21.docx@ 30439@ 2 @ 1
3.4 Operating Elements
Pos: 39 /S erie 7 50 (WA GO-I/O-SYS TEM )/ Ger ät ebes chr ei bung /B edi enel e men te/ Bedi en el eme nte Buskl em me 7 50-x xxx ni cht vor han den @ 4\mod_1236322031125_21.doc x @ 28063 @ @ 1
The I/O module 750-495 has no operating elements.
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18 Device Description WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Pos: 41 /A lle Ser ien (Al lge meine Mo dule)/ Über schrif ten für alle S erie n/Gerä tebes chrei bung /Sch ematis ches Sc haltbi ld - Über schri ft 2 @ 4\mod_1240984441312_21.docx@ 31967@ 2 @ 1
3.5 Schematic Diagram
Pos: 42 /S erie 7 50 (WA GO-I/O-SYS TEM) /Ger ätebes chrei bung /Sche matis che Sc haltbil der/ Anal ogeing angs klem men/Sc hemati sch es Schalt bild 7 50-049 5 @ 16\mod_1376382441894_21.docx@ 128560@ @ 1
Figure 6: Schematic circuit diagram for 750-495 and 750-495/000-001

WAGO-I/O-SYSTEM 750 Device Description 19
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Figure 7: Schematic circuit diagram for 750-495/000-002

20 Device Description WAGO-I/O-SYSTEM 750
750-495 3-Phase Power Measurement Module
Manual
Version 1.0.0
Function Earth FE!
In order to get a function earth, the connection N is 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.
The 3 voltage measuring paths are not isolated from the 4 current measuring
paths!
The connection N forms the internal reference for all electrical measurements.
Potential differences between N and the current inputs may result in measurement
errors or even destruction of the I/O module!
Do not connect the current inputs to PE!
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