WAGO 750-438 User manual

Manual
WAGO-I/O-SYSTEM 750
2DI NAMUR Ex i
750-438
2-
Channel Digital Input Module NAMUR, Ex i,
Proximity sensor acc. to DIN EN 50227
V 1.2.0

2 WAGO-I/O-SYSTEM 750
750-438 2DI NAMUR Ex i
Manual
V 1.2.0
© 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.

WAGO-I/O-SYSTEM 750 Table of Contents 3
750-438 2DI NAMUR Ex i
Manual
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Table of Contents
Table of Contents................................................................................................... 3
1Notes about this Documentation................................................................. 5
1.1 Validity of this Documentation................................................................. 5
1.2 Copyright................................................................................................... 5
1.3 Symbols..................................................................................................... 6
1.4 Number Notation....................................................................................... 8
1.5 Font Conventions ...................................................................................... 8
2Important Notes........................................................................................... 9
2.1 Legal Bases ............................................................................................... 9
2.1.1 Subject to Changes............................................................................... 9
2.1.2 Personnel Qualifications....................................................................... 9
2.1.3 Use of the 750 Series in Compliance with Underlying Provisions...... 9
2.1.4 Technical Condition of Specified Devices......................................... 10
2.2 Safety Advice (Precautions).................................................................... 11
3Device Description ..................................................................................... 13
3.1 View........................................................................................................ 16
3.2 Connectors............................................................................................... 17
3.2.1 Data Contacts/Internal Bus................................................................. 17
3.2.2 Power Jumper Contacts/Field Supply ................................................ 18
3.2.3 CAGE CLAMP®Connections ........................................................... 19
3.3 Display Elements .................................................................................... 20
3.4 Operating Elements................................................................................. 20
3.5 Schematic Diagram................................................................................. 21
3.6 Technical Data ........................................................................................ 22
3.6.1 Device data......................................................................................... 22
3.6.2 Supply................................................................................................. 22
3.6.3 Communication .................................................................................. 22
3.6.4 Inputs.................................................................................................. 23
3.6.5 Explosion Protection .......................................................................... 24
3.7 Approvals................................................................................................ 25
3.8 Standards and Guidelines........................................................................ 26
4Mounting..................................................................................................... 27
4.1 Mounting Sequence................................................................................. 27
4.2 Inserting and Removing Devices ............................................................ 28
4.2.1 Inserting I/O Module.......................................................................... 28
4.2.2 Removing the I/O Module.................................................................. 29
5Connect Devices ......................................................................................... 30
5.1 Connecting a Conductor to the CAGE CLAMP®................................... 30
5.2 Connection Example............................................................................... 31
6Process Image............................................................................................. 32
7Use in Hazardous Environments.............................................................. 33
7.1 Marking Configuration Examples........................................................... 34
7.1.1 Marking for Europe according to ATEX and IEC-Ex........................ 34

4 Table of Contents WAGO-I/O-SYSTEM 750
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7.1.2 Marking for America according to NEC 500..................................... 39
7.2 Installation Regulations........................................................................... 40
7.2.1 Special conditions for safe use (ATEX Certificate TÜV 07 ATEX
554086 X)........................................................................................... 41
7.2.2 Special conditions for safe use (ATEX Certificate TÜV 12 ATEX
106032 X)........................................................................................... 42
7.2.3 Special conditions for safe use (IEC-Ex Certificate TUN 09.0001 X)43
7.2.4 Special conditions for safe use (IEC-Ex Certificate IECEx TUN
12.0039 X).......................................................................................... 44
7.2.5 ANSI/ISA 12.12.01 ............................................................................ 45
List of Figures...................................................................................................... 46
List of Tables........................................................................................................ 47

WAGO-I/O-SYSTEM 750 Notes about this Documentation 5
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1 Notes about this Documentation
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.
1.1 Validity of this Documentation
This documentation is only applicable to the I/O module 750-438
(2DI NAMUR Ex i) of the WAGO-I/O-SYSTEM 750 series.
The I/O module 750-438 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.
1.2 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.

6 Notes about this Documentation WAGO-I/O-SYSTEM 750
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Manual
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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.

WAGO-I/O-SYSTEM 750 Notes about this Documentation 7
750-438 2DI NAMUR Ex i
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Additional Information:
Refers to additional information which is not an integral part of this
documentation (e.g., the Internet).

8 Notes about this Documentation WAGO-I/O-SYSTEM 750
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Manual
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1.4 Number Notation
Table 1: 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 2: 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]

WAGO-I/O-SYSTEM 750 Important Notes 9
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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 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.
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.
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.

10 Important Notes WAGO-I/O-SYSTEM 750
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Manual
V 1.2.0
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.
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.

WAGO-I/O-SYSTEM 750 Important Notes 11
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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 components while energized!
All power sources to the device shall be switched off prior to performing any
installation, repair or maintenance work.
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.
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.
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.
Cleaning only with permitted materials!
Clean soiled contacts using oil-free compressed air or with ethyl alcohol and
leather cloths.

12 Important Notes WAGO-I/O-SYSTEM 750
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Manual
V 1.2.0
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 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).

WAGO-I/O-SYSTEM 750 Device Description 13
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3 Device Description
The digital input module 750-438 receives binary signals from sensors operating
in hazardous environments of zones 0 or 1, e.g. NAMUR sensors, optocouplers,
mechanical contacts or other actuating elements.
Installation only in zone 2 or in non-hazardous environments!
The installation of the WAGO-I/O-SYSTEM 750 fieldbus couplers/controllers
and I/O modules is only to be done in zone 2 or in non-hazardous environments.
The I/O module has 2 input channels, providing a direct, intrinsically safe
connection to 2-wire sensors. The input signals are connected to the DI 1 or DI 2
CAGE CLAMP®terminals and the sensor supplies to the Uv 1 or Uv 2 CAGE
CLAMP®terminals.
The Uv terminals supply a short-circuit proof voltage of 8.2 V to the sensors.
The assignment of the connections is described in the "Connections" section.
Connection examples are shown in section "Connecting Devices" "Connection
Examples".
A green LED indicates the switched status of each channel.
The meaning of the LEDs is described in the “Display Elements” section.
Ex i I/O modules shall only be supplied via Ex i 24VDC power supply
module!
Ex i I/O modules shall only be operated with an Ex i 24VDC power supply
module (see figure below).

14 Device Description WAGO-I/O-SYSTEM 750
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Manual
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Figure 1: Supply principle Ex i
The Ex i I/O module receives the 24V voltage supply for the field level from an
upstream Ex i I/O module or from an Ex i power supply module via the power
contacts used as blade contacts. It then provides this potential to subsequent I/O
modules via the power contacts used as spring contacts.
Do not exceed maximum current via power contacts!
The maximum current available from the 750-606 or 750-625/000-001 Ex-i
Supply Module is 1 A.
When configuring the system, ensure that this current is not exceeded. If
exceeded, an additional potential feed module must be used.
Keep the air and creep distances between intrinsically safe segments!
The maximum current available from the 750-606 or 750-625/000-001 Ex-i
Supply Module is 1 A.
If the use of further DC 24 V Ex i Supply modules is necessary for reasons of
extent of utilization, four Separation Modules (750-616) must be used to
guarantee the distance between the intrinsically safe segments.

WAGO-I/O-SYSTEM 750 Device Description 15
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Use potential feed module for Ground (earth)!
The I/O module has no power contacts for PE intake and transfer. Use a potential
feed module when a PE feed is needed for the subsequent I/O modules.
The field voltage and the system voltage are electrically isolated from each other.
Any configuration of the I/O module is possible within an intrinsically safe
segment when configuring the fieldbus node. An arrangement in groups within the
group of potentials is not necessary.
The I/O module 750-438 can be used with all fieldbus couplers/controllers of the
WAGO-I/O-SYSTEM 750.
Further information about explosion prevention!
Further information about explosion prevention can be found in section "Use in
Hazardous Environments"!

16 Device Description WAGO-I/O-SYSTEM 750
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3.1 View
Figure 2: View
Table 3: Caption acc. to figure “View “
No.
Designation
Description
Details see chapter
1 ---
Marking possibility with
Mini-WSB
---
2 A, E Status-LEDs
„Device description“ >
„Display elements“
3 --- Data contacts
„Assembly“ > „Mounting
device“
4 1, 4, 5, 8
CAGE CLAMP®- supply
Inputs DI 1, DI 2 and Sensor
supply Uv
„Device description“ > „
Connections “
5 --- Power jumper contacts +24 V
„Device description“ > „
Connections “
6 --- Release clip
„Assembly“ > „Mounting
device“
7 --- Power contacts 0 V
„Device description“ > „
Connections

WAGO-I/O-SYSTEM 750 Device Description 17
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3.2 Connectors
3.2.1 Data Contacts/Internal Bus
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 3: 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 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.

18 Device Description WAGO-I/O-SYSTEM 750
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3.2.2 Power Jumper Contacts/Field Supply
Risk of injury due to sharp-edged male contacts!
The male contacts are sharp-edged. Handle the module carefully to prevent injury.
The I/O module 750-438 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 male contacts and the contacts on the right side as spring
contacts.
Table 4: Power jumper contacts
Figure 4: Power
jumper contacts
Connection
Type
Number
Function
1 Blade contact 2 Infeed of the field supply voltage
(UVand 0 V)
2 Spring contact 2 Forwarding of the field supply voltage
(UVand 0 V)
Do not exceed maximum current via power contacts!
The maximum current available from the 750-606 or 750-625/000-001 Ex-i
Supply Module is 1 A.
When configuring the system, ensure that this current is not exceeded. If
exceeded, an additional potential feed module must be used.

WAGO-I/O-SYSTEM 750 Device Description 19
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3.2.3 CAGE CLAMP®Connections
Table 5: Connections
Fig. 5: Connections
Connection
Chann
el
Designation Function
1
1
DI 1 Input DI 1: Signal voltage
4 Uv 1 Input DI 1: Sensor supply
5
2
DI 2 Input DI 2: Signal voltage
8 Uv 2 Input DI 2: Sensor supply
Power
jumper
contacts
- +24 V Field supply 24 V
Power
jumper
contacts
- 0 V Field supply 0 V

20 Device Description WAGO-I/O-SYSTEM 750
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3.3 Display Elements
Table 6: Display elements
Figure 6: Display
elements
LED Channel
Desig-
nation
State Function
A 1 State
DI 1
off Input DI 1: Signal voltage (0)
green Input DI 1: Signal voltage (1)
E 2 State
DI 2
off Input DI 2: Signal voltage (0)
green Input DI 2: Signal voltage (1)
3.4 Operating Elements
The I/O module 750-438 has no operating elements.