WAGO 750-637 User manual

Public
Manual
WAGO I/O System 750
750-637(/xxx-xxx)
Incremental Enco
der Interfaces
Version 1.6.1

2 WAGO I/O System 750
750-637 Incremental Encoder Interfaces
Manual
Version 1.6.1
Public
© 2021 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
750-637 Incremental Encoder Interfaces
Manual
Version 1.6.1
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Table of Contents
1Notes about this Documentation .............................................................5
1.1 Validity of this Documentation.................................................................5
1.2 Copyright................................................................................................5
1.3 Symbols .................................................................................................7
1.4 Number Notation ....................................................................................9
1.5 Font Conventions ...................................................................................9
2Important Notes ......................................................................................10
2.1 Legal Bases..........................................................................................10
2.1.1 Subject to Changes..........................................................................10
2.1.2 Personnel Qualifications ..................................................................10
2.1.3 Use of the 750 Series in Compliance with Underlying Provisions.....10
2.1.4 Technical Condition of Specified Devices.........................................11
2.1.4.1 Disposal ......................................................................................11
2.1.4.1.1 Electrical and Electronic Equipment........................................11
2.1.4.1.2 Packaging...............................................................................12
2.2 Safety Advice (Precautions) .................................................................13
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 ..............................................19
3.2.3 CAGE CLAMP®Connectors.............................................................20
3.2.3.1 Versions 750-637 and 750-637/000-003......................................20
3.2.3.2 Version 750-637/000-001 ............................................................21
3.2.3.3 Versions 750-637/000-002 and 750-637/000-004........................22
3.3 Display Elements..................................................................................23
3.4 Operating Elements..............................................................................25
3.5 Schematic Diagram ..............................................................................25
3.6 Technical Data .....................................................................................27
3.6.1 Device Data .....................................................................................27
3.6.2 Power Supply...................................................................................27
3.6.3 Communication................................................................................27
3.6.4 Inputs/Outputs..................................................................................28
3.6.5 Digital Outputs (N1, N2) ...................................................................28
3.6.6 Digital Inputs (Latch, Gate, Ref) .......................................................28
3.6.7 Quadrature Inputs (A, /A, B, /B, C, /C) .............................................29
3.6.8 Quadrature Decoder ........................................................................30
3.6.9 Climatic Environmental Conditions...................................................31
3.7 Approvals .............................................................................................32
3.7.1 Ex Approvals....................................................................................32
3.8 Standards and Guidelines ....................................................................34
4Process Image.........................................................................................35
4.1 Control/Status Byte...............................................................................37
5Function Description ..............................................................................44

4 Table of Contents WAGO I/O System 750
750-637 Incremental Encoder Interfaces
Manual
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6Mounting..................................................................................................47
6.1 Mounting Sequence..............................................................................48
6.2 Inserting and Removing Devices ..........................................................48
6.2.1 Inserting the I/O Module...................................................................48
6.2.2 Removing the I/O Module ................................................................50
7Connect Devices .....................................................................................51
7.1 Connecting a Conductor to the CAGE CLAMP®...................................51
8Use in Hazardous Environments ...........................................................52
8.1 Marking Configuration Examples ..........................................................53
8.1.1 Marking for Europe According to ATEX and IECEx..........................53
8.1.2 Marking for the United States of America (NEC) and Canada
(CEC)...............................................................................................57
8.2 Installation Regulations.........................................................................60
8.2.1 Special Notes including Explosion Protection...................................60
8.2.2 Special Notes Regarding UL Hazardous Location............................62
List of Figures ..................................................................................................63
List of Tables....................................................................................................64

WAGO I/O System 750 Notes about this Documentation 5
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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 750-637 (Incremental
Encoder Interfaces) and the variants listed in the table below.
Tabelle 1: Varianten
Bestellnummer/Variante
Bezeichnung
750-637
Incremental Encoder Interfaces
750-637/000-001
Incremental Encoder Interfaces 24 V/32 Bit
differential
750-637/000-002
Incremental Encoder Interfaces 24 V/32 Bit single
ended
750-637/000-003
Incremental Encoder Interfaces RS-422/32Bit/Single
Interpreter
750-637/000-004
Incremental Encoder Interfaces 24 V/32 Bit single
ended/cam outputs
Documentation Validity for Variants
Unless otherwise indicated, the information given in this documentation applies
to listed variants.
The I/O module 750-637 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 Copyright

6 Notes about this Documentation WAGO I/O System 750
750-637 Incremental Encoder Interfaces
Manual
Version 1.6.1
Public
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.

WAGO I/O System 750 Notes about this Documentation 7
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1.3 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.

8 Notes about this Documentation WAGO I/O System 750
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Manual
Version 1.6.1
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Additional Information:
Refers to additional information which is not an integral part of this
documentation (e.g., the Internet).

WAGO I/O System 750 Notes about this Documentation 9
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1.4 Number Notation
Table 2: 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 (.)
1.5 Font Conventions
Table 3: 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]

10 Important Notes WAGO I/O System 750
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Manual
Version 1.6.1
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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 fulfill the requirements of protection type IP20 and are designed for
use in dry interior spaces. There is protection against finger injury and solid
impurities up to 12.5 mm diameter is assured; protection against water damage is
not ensured.
The devices represent open-type devices. They may only be installed in
enclosures (tool-secured enclosures or operating rooms) which fulfil the listed
requirements specified in the safety instructions in chapter “Safety Advice
(Precautions)”. Use without additional protective measures in environments within
which dust, corrosive fumes, gases or ionized radiation can occur is considered
improper use.
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

WAGO I/O System 750 Important Notes 11
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the section “Device Description” > “Standards and Guidelines” in the manual for
the used device.
Appropriate housing (per 2014/34/EU) is required when operating the WAGO I/O
System 750 in hazardous environments. Please observe the installation
regulations! Please note that a 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.

12 Important Notes WAGO I/O System 750
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Manual
Version 1.6.1
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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.

WAGO I/O System 750 Important Notes 13
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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 device in only one suitable enclosure!
The device is an open system. Install the device in a suitable enclosure. This
enclosure must:
• Guarantee that the max. permissible degree of pollution is not exceeded.
• Offer adequate protection against contact.
• Prevent fire from spreading outside of the enclosure.
• Offer adequate protection against UV irradiation.
• Guarantee mechanical stability
• Restrict access to authorized personnel and may only be opened with 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.

14 Important Notes WAGO I/O System 750
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Inadequate wire cross sections can cause temperature increases!
To avoid increasing thermal risks, only use conductor cross-sections sufficient for
the required maximum load current. The conductor cross-sections specified in
the technical data refer exclusively to the mechanical connection capacity of the
clamping points.
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.
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.

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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.

16 Device Description WAGO I/O System 750
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Manual
Version 1.6.1
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3 Device Description
This module is an interface for different versions of incremental encoders with
various connections (RS-422, differential, single-ended).
The data width for the encoder module is 32 bits. Either the current counter
value, the latch value, the set value or the current rate can be shown in the
process data.
The table below provides an overview of the different versions and their
connections:
Table 4: Inputs/Outputs – Versions 750-637 and 750-637/000-003
Inputs/Outputs
A, /A, B, /B
Quadrature inputs, 24 V, RS-422
C, /C
Initial point input, 24 V, RS-422
Latch, Gate, Ref
Input, 24 V
N1, N2
Output, 24 V
Table 5: Inputs/Outputs – Versions 750-637/000-001
Inputs/Outputs
A, /A, B, /B
Quadrature inputs, 24 V, differential
C, /C
Initial point input, 24 V, differential
Latch, Gate, Ref
Input, 24 V
N1, N2
Output, 24 V
Table 6: Inputs/Outputs – Versions 750-637/000-002 and 750-637/000-004
Inputs/Outputs
A, B
Quadrature inputs, 24 V, single-ended
C
Initial point input, 24 V, single-ended
Latch, Gate, Ref
Input, 24 V
N1, N2
Output, 24 V
A counter with quadrature decoder as well as a latch for the zero impulse can be
read or enabled by the control. The control can set the counter. Depending on
the operating mode, the counter value is added to the latch register on a positive
edge at the “C” or “Latch” input.
The rate (increments/ms) is automatically acquired and can also be transmitted to
the control as an alternative to the latch value.
A counter lock-out is possible using the “Gate” input. Input “Ref” can be used to
activate the initial point “C” function.
The cam outputs N1 and N2 indicate whether the counter value is within a
defined range of values. The range can be adjusted for each cam via the control
unit.

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Starting with the software version XXXX03XX, the cam outputs can be disabled
by the control unit and the states of the cam outputs can be queried.
The signal status for inputs A, B and C, Latch and Gate and the operating status
of the I/O module are each indicated by a dedicated green status LED.
The meaning of the LEDs is described in the “Display Elements” section.
Power supply for 24 V encoders is provided via the 24 V field supply connections.
The encoder ground must be connected with the 0 V module.
Power supply for 5 V encoders can be tapped directly at connections Veand V0of
the standard module 750-637.
Use a power supply module!
Use a power supply module for field-side power supply of downstream I/O
modules.
The field voltage and the system voltage are electrically isolated from each other.
The I/O module 750-637 can be used with all fieldbus couplers/controllers of the
WAGO I/O System 750 (except for the economy types 750-320, -323, -324
and -327).

18 Device Description WAGO I/O System 750
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3.1 View
Figure 1: View
Table 7: 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
CAGE CLAMP®connectors
“Device Description” > “Connectors”
5
Release tab
“Mounting” > ”Inserting and Removing
Devices”

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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. The
contacting for the local bus consists 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!
Pay attention to potential equalization from the environment!
The devices are equipped with electronic components that may be destroyed by
electrostatic discharge. When handling the devices, please ensure that
environmental factors (personnel, work space and packaging) are properly
equalized. Do not touch any conducting parts, e.g., data contacts.
3.2.2 Power Jumper Contacts/Field Supply
The I/O module 750-637 has no power jumper contacts.

20 Device Description WAGO I/O System 750
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3.2.3 CAGE CLAMP®Connectors
3.2.3.1 Versions 750-637 and 750-637/000-003
Figure 3: CAGE CLAMP®Connectors – Versions 750-637 and 750-637/000-003
Table 8: Legend for Figure “CAGE CLAMP®Connectors – Versions 750-637 and 750-637/000-003“
Designation
Connector
Function
A
1, left
Connection of sensor
B
2, left
C
3, left
/A
5, left
/B
6, left
/C
7, left
5 V
4, left
Sensor supply
0 V
8, left
24 V
1, right
Supply voltage input
0 V
5, right
N1
2, right
Cam outputs
N2
6, right
Latch
3, right
Latch input
Gate
7, right
Gate input
Ref
4, right
Ref input
Shield
(screen)
8, right Shield connection (carrier rail)