WAGO 750-451 User manual

Manual
WAGO-I/O-SYSTEM 750
750-451(/xxx-xxx)
8 AI RTD
8
-Channel Analog Input Module for Resistance
Sensors
Version 1.2.0

2 WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
© 2019 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]
Web: www.wago.com
Technical Support
Phone: [phone] – 4 45 55
Fax: [phone] – 84 45 55
E-Mail: [email protected]
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: [email protected]
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.
WAGO is a registered trademark of WAGO Verwaltungsgesellschaft mbH.

WAGO-I/O-SYSTEM 750 Table of Contents 3
750-451 8 AI RTD
Manual
Version 1.2.0
Table of Contents
1Notes 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
2Important 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 750 Series in Compliance with Underlying Provisions.....11
2.1.4 Technical Condition of Specified Devices.........................................12
2.1.4.1 Disposal ......................................................................................12
2.1.4.1.1 Electrical and Electronic Equipment........................................12
2.1.4.1.2 Packaging...............................................................................13
2.2 Safety Advice (Precautions) .................................................................14
3Device Description..................................................................................16
3.1 View .....................................................................................................18
3.2 Connectors...........................................................................................19
3.2.1 Data Contacts/Local Bus..................................................................19
3.2.2 Power Jumper Contacts/Field Supply ..............................................20
3.2.3 Push-in CAGE CLAMP®Connectors................................................21
3.3 Display Elements..................................................................................22
3.4 Operating Elements..............................................................................23
3.5 Schematic Diagram ..............................................................................23
3.6 Technical Data .....................................................................................24
3.6.1 Device Data .....................................................................................24
3.6.2 Power Supply...................................................................................24
3.6.3 Communication................................................................................24
3.6.4 Inputs...............................................................................................25
3.6.5 Measuring Accuracy at 25 °C...........................................................25
3.6.6 Connection Type..............................................................................26
3.6.7 Climatic Environmental Conditions...................................................26
3.7 Approvals .............................................................................................27
3.8 Standards and Guidelines ....................................................................28
4Process Image.........................................................................................29
4.1 Overview ..............................................................................................29
4.2 Control Bytes and Status Bytes ............................................................30
4.3 Process Data........................................................................................32
4.3.1 Overview of Sensor Types ...............................................................32
4.3.2 Pt100 (IEC 751), ID 0.......................................................................33
4.3.2.1 Default Format.............................................................................33
4.3.2.2 S5-FB250 Format........................................................................34
4.3.3 Ni100 (DIN 43760), ID 1
...................................................................35

4 Table of Contents WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
4.3.3.1 Default Format.............................................................................35
4.3.3.2 S5-FB250 Format........................................................................36
4.3.4 Pt1000 (IEC 751), ID 2.....................................................................37
4.3.4.1 Default Format.............................................................................37
4.3.4.2 S5-FB250 Format........................................................................38
4.3.5 Pt500 (IEC 751), ID 3.......................................................................39
4.3.5.1 Default Format.............................................................................39
4.3.5.2 S5-FB250 Format........................................................................40
4.3.6 Pt200 (IEC 751), ID 4.......................................................................41
4.3.6.1 Default Format.............................................................................41
4.3.6.2 S5-FB250 Format........................................................................42
4.3.7 Ni1000 (TK6180, DIN 43760), ID 5 ..................................................43
4.3.7.1 Default Format.............................................................................43
4.3.7.2 S5-FB250 Format........................................................................44
4.3.8 Ni120 (Minco), ID 6 ..........................................................................45
4.3.8.1 Default Format.............................................................................45
4.3.8.2 S5-FB250 Format........................................................................46
4.3.9 Ni1000 (TK5000), ID 7 .....................................................................47
4.3.9.1 Default Format.............................................................................47
4.3.9.2 S5-FB250 Format........................................................................48
4.3.10 Ni1000 (TK6180, DIN 43760), high-resolution, ID 8 .........................49
4.3.10.1 Default Format.............................................................................49
4.3.10.2 S5-FB250 Format........................................................................50
4.3.11 Ni1000 (TK5000), high-resolution, ID 9 ............................................51
4.3.11.1 Default Format.............................................................................51
4.3.11.2 S5-FB250 Format........................................................................52
4.3.12 Pt1000 (IEC 751), high-resolution, ID 10..........................................53
4.3.12.1 Default Format.............................................................................53
4.3.12.2 S5-FB250 Format........................................................................54
4.3.13 Pt100 (IEC 751), High-Resolution, ID 11..........................................55
4.3.13.1 Standard Format .........................................................................55
4.3.13.2 S5-FB250 Format........................................................................56
4.3.14 Resistance Measurement 1, 0 Ohm … 5.0 kOhm, ID 14..................57
4.3.14.1 Default Format.............................................................................57
4.3.14.2 S5-FB250 Format........................................................................58
4.3.15 Resistance Measurement 2, 0 Ohm … 1.2 kOhm, ID 15..................59
4.3.15.1 Default Format.............................................................................59
4.3.15.2 S5-FB250 Format........................................................................60
5Mounting..................................................................................................61
5.1 Mounting Sequence..............................................................................61
5.2 Inserting and Removing Devices ..........................................................62
5.2.1 Inserting the I/O Module...................................................................62
5.2.2 Removing the I/O Module ................................................................63
6Connect Devices .....................................................................................64
6.1 Connecting a Conductor to the Push-in CAGE CLAMP®......................64
6.2 Connection Examples...........................................................................65
6.2.1 8 × 2-wire.........................................................................................65

WAGO-I/O-SYSTEM 750 Table of Contents 5
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Manual
Version 1.2.0
7Commissioning .......................................................................................66
7.1 Parameterization with WAGO-I/O-CHECK............................................66
7.1.1 Parameterization Dialog...................................................................68
7.1.1.1 Toolbar........................................................................................68
7.1.1.1.1 Main Menu..............................................................................69
7.1.1.1.2 Application Menu ....................................................................70
7.1.1.2 Navigation Area...........................................................................71
7.1.1.3 Application Area ..........................................................................72
7.1.1.3.1 Importing/Exporting Parameter File.........................................73
7.1.1.3.2 “Settings” Menu Item...............................................................74
7.1.1.3.3 “Scaling” Menu Item................................................................79
7.1.1.3.4 Application Examples of Scaling .............................................81
7.1.1.3.5 “Calibration” Menu Item...........................................................83
7.1.1.3.6 Application Example of Calibration..........................................84
7.1.1.4 Status Bar ...................................................................................86
7.2 Configuration and Parameterization using a GSD File with
PROFIBUS DP and PROFINET IO.......................................................87
8Diagnostics..............................................................................................88
8.1 Error Response ....................................................................................88
9Appendix .................................................................................................90
9.1 Configuration and Parameterization using a GSD File with
PROFIBUS DP and PROFINET IO.......................................................90
9.1.1 Configuration 8 AI RTD....................................................................90
9.1.1.1 PROFIBUS DP (750-333, 750-833) Fieldbus Coupler
PROFINET IO (750-370) Fieldbus Coupler .................................90
9.1.1.2 PROFINET IO (750-375, 750-377) Fieldbus Coupler...................90
9.1.2 Parameterization 8 AI RTD ..............................................................91
9.1.2.1 All PROFIBUS DP and PROFINET IO Fieldbus Couplers ...........94
9.1.2.2 PROFIBUS DP (750-333, 750-833) Fieldbus Coupler .................95
9.1.2.3 PROFINET IO (750-370, 750-375, 750-377) Fieldbus Coupler....95
10 Use in Hazardous Environments ...........................................................97
10.1 Marking Configuration Examples ..........................................................98
10.1.1 Marking for Europe According to ATEX and IECEx..........................98
10.1.2 Marking for the United States of America (NEC) and
Canada (CEC) ...............................................................................102
10.2 Installation Regulations.......................................................................105
10.2.1 Special Notes Regarding Explosion Protection ..............................105
10.2.2 Special Notes Regarding ANSI/ISA Ex ..........................................107
List of Figures ................................................................................................108
List of Tables..................................................................................................109

6 Notes about this Documentation WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
1 Notes about this Documentation
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.
1.1 Validity of this Documentation
This documentation is only applicable to the I/O module 750-451 (8 AI RTD) and
the variants listed in the table below.
Table 1: Variants
Item Number/Variant
Designation
750-451
8 AI RTD
750-451/025-000
8 AI RTD/T
The I/O module 750-451 shall only be installed and operated according to the
instructions in this manual and in the manual for the used fieldbus coupler or
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 or 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.
1.2 Revision History
Table 2: Revision History
Document
version
Device version
Description of change
Hardware
Firmware
1.0.0
01
01
First issue
1.1.0
01
01
Changes to approvals
1.2.0
01
02
Changes to approvals, Pt100
(EN 60751), ID 11 added; changes to
WAGO-I/O-CHECK parametrization
dialog

WAGO-I/O-SYSTEM 750 Notes about this Documentation 7
750-451 8 AI RTD
Manual
Version 1.2.0
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.

8 Notes about this Documentation WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
1.4 Symbols
Personal Injury!
Indicates a high-risk, imminently hazardous situation which, if not avoided, will
result in death or serious injury.
Personal Injury Caused by Electric Current!
Indicates a high-risk, imminently hazardous situation which, if not avoided, will
result in death or serious injury.
Personal Injury!
Indicates a moderate-risk, potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Personal Injury!
Indicates a low-risk, potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
Damage to Property!
Indicates a potentially hazardous situation which, if not avoided, may result in
damage to property.
Damage to Property Caused by Electrostatic Discharge (ESD)!
Indicates a potentially hazardous situation which, if not avoided, may result in
damage to property.
Important Note!
Indicates a potential malfunction which, if not avoided, however, will not result in
damage to property.

WAGO-I/O-SYSTEM 750 Notes about this Documentation 9
750-451 8 AI RTD
Manual
Version 1.2.0
Additional Information:
Refers to additional information which is not an integral part of this
documentation (e.g., the Internet).

10 Notes about this Documentation WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
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 (.)
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
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]

WAGO-I/O-SYSTEM 750 Important Notes 11
750-451 8 AI RTD
Manual
Version 1.2.0
2 Important Notes
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.
2.1 Legal Bases
2.1.1 Subject to Changes
WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any
alterations or modifications. 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.
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.
2.1.3 Use of the 750 Series in Compliance with Underlying
Provisions
Fieldbus 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 actuators or higher-level control systems. Using 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 or controller.
Appropriate housing (per 2014/34/EU) is required when operating the
WAGO-I/O-SYSTEM 750 in hazardous environments. Please note that a

12 Important Notes WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
prototype test certificate must be obtained that confirms the correct installation of
the system in a housing or switch cabinet.
The implementation of safety functions such as EMERGENCY STOP or safety
door monitoring must only be performed by the F-I/O modules within the modular
WAGO-I/O-SYSTEM 750. Only these safe F-I/O modules ensure functional
safety in accordance with the latest international standards. WAGO's
interference-free output modules can be controlled by the safety function.
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. These
modules contain no parts that can be serviced or repaired by the user. The
following actions will result in the exclusion of liability on the part of WAGO
Kontakttechnik GmbH & Co. KG:
• Repairs,
• Changes to the hardware or software that are not described in the
operating instructions,
• Improper use of the components.
Further details are given in the contractual agreements. Please send your
request for modified and new hardware or software configurations directly to
WAGO Kontakttechnik GmbH & Co. KG.
2.1.4.1 Disposal
2.1.4.1.1 Electrical and Electronic Equipment
Electrical and electronic equipment may not be disposed of
with household waste. This also applies to products without
this symbol.
Electrical and electronic equipment contain materials and substances that can be
harmful to the environment and health. Electrical and electronic equipment must
be disposed of properly after use.
WEEE 2012/19/EU applies throughout Europe. Directives and laws may vary
nationally.

WAGO-I/O-SYSTEM 750 Important Notes 13
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Environmentally friendly disposal benefits health and protects
the environment from harmful substances in electrical and
electronic equipment.
• Observe national and local regulations for the disposal of electrical and
electronic equipment.
• Clear any data stored on the electrical and electronic equipment.
• Remove any added battery or memory card in the electrical and
electronic equipment.
• Have the electrical and electronic equipment sent to your local
collection point.
Improper disposal of electrical and electronic equipment can be harmful to the
environment and human health.
2.1.4.1.2 Packaging
Packaging contains materials that can be reused.
PPWD 94/62/EU and 2004/12/EU packaging guidelines apply throughout
Europe. Directives and laws may vary nationally.
Environmentally friendly disposal of the packaging protects the environment and
allows sustainable and efficient use of resources.
• Observe national and local regulations for the disposal of packaging.
• Dispose of packaging of all types that allows a high level of recovery,
reuse and recycling.
Improper disposal of packaging can be harmful to the environment and wastes
valuable resources.

14 Important Notes WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
2.2 Safety Advice (Precautions)
For installing and operating purposes of the relevant device to your system the
following safety precautions shall be observed:
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.
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.
Ensure disconnect and overcurrent protection!
The device is intended for installation in automation technology systems.
Disconnect protection is not integrated. Connected systems must be protected by
a fuse.
Provide suitable disconnect and overcurrent protection on the system side!
Ensure a standard connection!
To minimize any hazardous situations resulting in personal injury or to avoid
failures in your system, the data and power supply lines shall be installed
according to standards, with careful attention given to ensuring the correct
terminal assignment. Always adhere to the EMC directives applicable to your
application.
Ensure proper contact with the DIN-rail!
Proper electrical contact between the DIN-rail and device is necessary to
maintain the EMC characteristics and function of the device.

WAGO-I/O-SYSTEM 750 Important Notes 15
750-451 8 AI RTD
Manual
Version 1.2.0
Replace defective or damaged devices!
Replace defective or damaged device/module (e.g., in the event of deformed
contacts).
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.
Clean only with permitted materials!
Clean housing and soiled contacts with propanol.
Do not use any contact spray!
Do not use any contact spray. The spray may impair contact area functionality in
connection with contamination.
Do not reverse the polarity of connection lines!
Avoid reverse polarity of data and power supply lines, as this may damage the
devices involved.
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.

16 Device Description WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
3 Device Description
The I/O module 750-451 (8 AI RTD) measures resistance at field level or
evaluates platinum or nickel resistance sensors.
The resistance values are converted into temperature values. A microprocessor
in the I/O module linearizes the measured resistance values and converts them
into a numeric value proportional to the temperature of the selected resistance
sensor.
The WAGO-I/O-CHECK commissioning tool can be used to set the required
operating mode.
The I/O module has eight input channels, providing a direct connection to 2-wire
resistance sensors.
The sensors are connected to Push-in CAGE CLAMP®terminals +A1/−A1 ...
+A8/−A8.
The assignment of the connections is described in the “Connectors” section.
Connection examples are shown in section “Connect Devices” > … >
“Connection Example(s)”.
The operating status of the channels is indicated by a green status LED per
channel.
A red error LED per channel indicates a wire break, a short circuit or that the
signal is outside the measuring range.
The meaning of the LEDs is described in the “Display Elements” section.
Do not exceed maximum values via power contacts!
The maximum current that can flow through the power jumper contacts is 10 A.
The power jumper contacts can be damaged and the permissible operating
temperature can be exceeded by higher current values.
When configuring the system, do not exceed the permissible maximum current
value. If there is a higher power requirement, you must use an additional supply
module to provide the field voltage.
Use supply modules for ground (earth)!
The I/O module has no power jumper contacts for receiving and transmitting the
earth potential. Use a supply module when an earth potential is needed for the
subsequent I/O modules.
With consideration of the power jumper contacts, the individual modules can be
arranged in any combination when configuring the fieldbus node.
An arrangement in groups within the group of potentials is not necessary.

WAGO-I/O-SYSTEM 750 Device Description 17
750-451 8 AI RTD
Manual
Version 1.2.0
The 750-451 module can be used with the fieldbus couplers and controllers of
the WAGO-I/O-SYSTEM 750 of the specified version or higher listed in the
“Compatibility list” table.
Table 5: Compatibility List 750-451
Bus System
Fieldbus Coupler/Controller
Item No..
Firmware Version
PROFINET Fieldbus coupler
750-375
03
750-377
03
PROFIBUS
Fieldbus coupler
750-333
17
Programmable fieldbus controller
750-833
16
ETHERNET
Fieldbus coupler
750-342
18
750-352
04
750-362
02
Programmable fieldbus controller
750-841
20
750-842
19
750-843
03
750-852
01
750-862
02
750-871
08
750-872
04
750-873
04
750-880
04
750-881
04
750-882
04
750-885
04
750-890
02
750-891
02
Fieldbus controller PFC100
750-810x
04
Fieldbus controller PFC200
750-82xx
01
DeviceNet
Fieldbus coupler
750-306
4L
ECO Fieldbus coupler
750-346
11
Programmable fieldbus controller
750-806
11
CANopen
Fieldbus coupler
750-337
20
750-338
20
ECO Fieldbus coupler
750-347
10
750-348
10
Programmable fieldbus controller
750-837
15
750-838
15
Modbus®
Fieldbus coupler
750-315/300-000
01
750-316/300-000
01
Programmable Fieldbus controller
750-815/300-000
01
750-816/300-000
01
EtherCat
Fieldbus coupler
750-354
03
SERCOS III
Fieldbus coupler
750-351
04
CC-Link
Fieldbus coupler
750-310
03
BACnet
Programmable Fieldbus controller
750-831
03
KNX
Programmable Fieldbus controller
750-889
07
The field voltage and the system voltage are electrically isolated from each other.

18 Device Description WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
3.1 View
Figure 1: View
Table 6: Legend for 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
Push-in CAGE CLAMP®
connectors
“Device Description” > “Connectors”
5
Power jumper contacts
“Device Description” > “Connectors”
6
Release tab
“Mounting” > “Inserting and Removing
Devices”

WAGO-I/O-SYSTEM 750 Device Description 19
750-451 8 AI RTD
Manual
Version 1.2.0
3.2 Connectors
3.2.1 Data Contacts/Local Bus
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 local bus. It is
comprised of 6 data contacts, which are available as self-cleaning gold spring
contacts.
Figure 2: Data Contacts
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!
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.

20 Device Description WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
Manual
Version 1.2.0
3.2.2 Power Jumper Contacts/Field Supply
Risk of injury due to sharp-edged blade contacts!
The blade contacts are sharp-edged. Handle the I/O module carefully to prevent
injury. Do not touch the blade contacts.
The I/O module 750-451 has 2 self-cleaning power jumper contacts that supply
and transmit power for the field side. The contacts on the left side of the I/O
module are designed as blade contacts and those on the right side as spring
contacts.
Figure 3: Power Jumper Contacts
Table 7: Legend for Figure “Power Jumper Contacts”
Contact
Type
Function
1
Spring contact
Potential transmission (Uv) for field supply
2
Spring contact
Potential transmission (0 V) for field supply
3
Blade contact
Potential feed-in (0 V) for field supply
4
Blade contact
Potential feed-in (Uv) for field supply
Do not exceed maximum values via power contacts!
The maximum current that can flow through the power jumper contacts is 10 A.
The power jumper contacts can be damaged and the permissible operating
temperature can be exceeded by higher current values.
When configuring the system, do not exceed the permissible maximum current
value. If there is a higher power requirement, you must use an additional supply
module to provide the field voltage.